CN109317186B - High-dispersion supported nickel-based catalyst and preparation method thereof - Google Patents
High-dispersion supported nickel-based catalyst and preparation method thereof Download PDFInfo
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 197
- 239000003054 catalyst Substances 0.000 title claims abstract description 87
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 74
- 239000006185 dispersion Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims abstract description 66
- 235000019353 potassium silicate Nutrition 0.000 claims description 51
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 47
- 238000003756 stirring Methods 0.000 claims description 45
- 239000008367 deionised water Substances 0.000 claims description 43
- 229910021641 deionized water Inorganic materials 0.000 claims description 43
- SHWZFQPXYGHRKT-FDGPNNRMSA-N (z)-4-hydroxypent-3-en-2-one;nickel Chemical compound [Ni].C\C(O)=C\C(C)=O.C\C(O)=C\C(C)=O SHWZFQPXYGHRKT-FDGPNNRMSA-N 0.000 claims description 34
- 239000012298 atmosphere Substances 0.000 claims description 31
- 239000002243 precursor Substances 0.000 claims description 31
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 30
- 239000002002 slurry Substances 0.000 claims description 30
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 17
- 239000001257 hydrogen Substances 0.000 claims description 17
- 229910052739 hydrogen Inorganic materials 0.000 claims description 17
- 238000001035 drying Methods 0.000 claims description 16
- -1 polytetrafluoroethylene Polymers 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 15
- 239000012065 filter cake Substances 0.000 claims description 15
- 238000010907 mechanical stirring Methods 0.000 claims description 15
- 230000007935 neutral effect Effects 0.000 claims description 15
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 15
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 15
- 238000005406 washing Methods 0.000 claims description 15
- KZPXREABEBSAQM-UHFFFAOYSA-N cyclopenta-1,3-diene;nickel(2+) Chemical compound [Ni+2].C=1C=C[CH-]C=1.C=1C=C[CH-]C=1 KZPXREABEBSAQM-UHFFFAOYSA-N 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- JMWUYEFBFUCSAK-UHFFFAOYSA-L nickel(2+);octadecanoate Chemical compound [Ni+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O JMWUYEFBFUCSAK-UHFFFAOYSA-L 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims 1
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 abstract description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 16
- 238000005984 hydrogenation reaction Methods 0.000 abstract description 13
- 239000011148 porous material Substances 0.000 abstract description 12
- 239000002105 nanoparticle Substances 0.000 abstract description 10
- 239000003795 chemical substances by application Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 9
- 238000011065 in-situ storage Methods 0.000 abstract description 8
- 239000000693 micelle Substances 0.000 abstract description 7
- 238000003786 synthesis reaction Methods 0.000 abstract description 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 238000005538 encapsulation Methods 0.000 abstract description 5
- 230000002209 hydrophobic effect Effects 0.000 abstract description 5
- 239000004094 surface-active agent Substances 0.000 abstract description 5
- 238000001308 synthesis method Methods 0.000 abstract description 5
- 238000006555 catalytic reaction Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 230000002194 synthesizing effect Effects 0.000 abstract description 4
- 125000003118 aryl group Chemical group 0.000 abstract description 3
- 238000004873 anchoring Methods 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 30
- 239000011734 sodium Substances 0.000 description 14
- 239000007864 aqueous solution Substances 0.000 description 11
- 239000002245 particle Substances 0.000 description 9
- 230000003197 catalytic effect Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 229910000510 noble metal Inorganic materials 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- NNBZCPXTIHJBJL-UHFFFAOYSA-N decalin Chemical compound C1CCCC2CCCCC21 NNBZCPXTIHJBJL-UHFFFAOYSA-N 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 4
- 101150116295 CAT2 gene Proteins 0.000 description 3
- 101100326920 Caenorhabditis elegans ctl-1 gene Proteins 0.000 description 3
- 101100494773 Caenorhabditis elegans ctl-2 gene Proteins 0.000 description 3
- 101100112369 Fasciola hepatica Cat-1 gene Proteins 0.000 description 3
- 101100005271 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) cat-1 gene Proteins 0.000 description 3
- 101100005280 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) cat-3 gene Proteins 0.000 description 3
- 101100126846 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) katG gene Proteins 0.000 description 3
- AOPCKOPZYFFEDA-UHFFFAOYSA-N nickel(2+);dinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O AOPCKOPZYFFEDA-UHFFFAOYSA-N 0.000 description 3
- 101100392078 Caenorhabditis elegans cat-4 gene Proteins 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000007210 heterogeneous catalysis Methods 0.000 description 1
- 125000001165 hydrophobic group Chemical group 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- LAIZPRYFQUWUBN-UHFFFAOYSA-L nickel chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Ni+2] LAIZPRYFQUWUBN-UHFFFAOYSA-L 0.000 description 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000010951 particle size reduction Methods 0.000 description 1
- MBUJACWWYFPMDK-UHFFFAOYSA-N pentane-2,4-dione;platinum Chemical compound [Pt].CC(=O)CC(C)=O MBUJACWWYFPMDK-UHFFFAOYSA-N 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 description 1
- NNBZCPXTIHJBJL-MGCOHNPYSA-N trans-decalin Chemical compound C1CCC[C@@H]2CCCC[C@H]21 NNBZCPXTIHJBJL-MGCOHNPYSA-N 0.000 description 1
- PXXNTAGJWPJAGM-UHFFFAOYSA-N vertaline Natural products C1C2C=3C=C(OC)C(OC)=CC=3OC(C=C3)=CC=C3CCC(=O)OC1CC1N2CCCC1 PXXNTAGJWPJAGM-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/03—Catalysts comprising molecular sieves not having base-exchange properties
- B01J29/0308—Mesoporous materials not having base exchange properties, e.g. Si-MCM-41
- B01J29/0316—Mesoporous materials not having base exchange properties, e.g. Si-MCM-41 containing iron group metals, noble metals or copper
- B01J29/0333—Iron group metals or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/20—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
- B01J35/23—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/391—Physical properties of the active metal ingredient
- B01J35/393—Metal or metal oxide crystallite size
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
- B01J37/0018—Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat)
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/02—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by hydrogenation
- C07C5/10—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by hydrogenation of aromatic six-membered rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2529/00—Catalysts comprising molecular sieves
- C07C2529/03—Catalysts comprising molecular sieves not having base-exchange properties
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2602/00—Systems containing two condensed rings
- C07C2602/02—Systems containing two condensed rings the rings having only two atoms in common
- C07C2602/14—All rings being cycloaliphatic
- C07C2602/26—All rings being cycloaliphatic the ring system containing ten carbon atoms
- C07C2602/28—Hydrogenated naphthalenes
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- Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention relates to a high-dispersion supported nickel-based catalyst and a preparation method thereof. According to the invention, the encapsulation of Ni nanoparticles by MCM-41 is realized by in-situ encapsulation of water-insoluble organic nickel (Ni) in the synthesis process of MCM-41, so that the activity and selectivity of naphthalene hydrogenation saturation catalytic reaction are improved. Owing to the separation and anchoring of MCM-41 to Ni, the catalyst has high Ni dispersity, average grain size of only 2.4 nm and good thermal stability. The main innovation point is that non-water-soluble organic nickel is used as a nickel source, a template agent (CTAB) used for synthesizing MCM-41 is used as a surfactant of the organic nickel, the organic nickel is wrapped in a hydrophobic core of a template micelle through an in-situ synthesis method, and then Ni nanoparticles are packaged and anchored in a pore channel of the MCM-41. The catalyst shows high activity of aromatic hydrogenation reaction and product selectivity, and has high industrial application value.
Description
Technical Field
The invention provides a preparation technology of a high-dispersion supported nickel-based catalyst, belonging to the technical field of preparation of catalysts for organic synthesis.
Background
In metal-supported catalyst applications, particle size reduction tends to be beneficial in promoting catalytic activity and selectivity. There are many methods for supporting metal particles on a porous carrier, including: impregnation, ion exchange, anchoring, etc. Although these methods can obtain metal components with small size, there are problems of uncontrollable size of metal particles, relatively low stability, complicated preparation process, etc. Therefore, it is a difficult task to improve the stability of the particles and reduce agglomeration and sintering while ensuring small size. To solve these problems, encapsulation methods have been applied to synthesize catalysts, such as deng et al (Angew Chem Int Ed Engl, 2013, 2: 371-. This work provides a new idea for designing efficient, sustainable catalysts.
MCM-41 has regular ordered mesoporous pore canals, high specific surface area and narrow pore size distribution, and is a preferred carrier of the catalyst. The synthesis of MCM-41 involves the bonding and interaction of silicate oligomers with surfactants. And thus has been applied to in-situ encapsulation of nano-precious metal particles. For example, in the in-situ synthesis of Pd/B-MCM-41 by Maya (Green Chemistry, 2012, 14: 3415-3422), the particle size of Pd particles is 10.9-22.6 nanometers, and the catalyst shows good catalytic performance. Lin (Chemical Communications, 2015, 51: 7482-. The stability of the nano particles is effectively protected by the carrier pore channels in the method. The method comprises the steps of injecting acetylacetone platinum into acetone liquid drops by Piotr Krawiec and the like, and introducing a Pt precursor into a pore channel of MCM-41 by using acetone as a transmission medium, so as to obtain the MCM-41-packaged Pt nano particles. These synthesis methods generally result in large particle size or complicated synthesis processes or in uncontrollable metal loadings, which render them unsuitable for mass promotion in industrial production.
The hydrogenation of aromatic hydrocarbon is favorable for reducing the cetane number of diesel oil and reducing environmental pollution. Naphthalene is often used as a model compound for hydrodearomatization as a bicyclic aromatic hydrocarbon. Further, tetrahydronaphthalene and decahydronaphthalene obtained by hydrogenation of naphthalene are important raw materials in chemical industry, and thus hydrogenation of naphthalene is also an important chemical process in industry. In the catalytic reaction of naphthalene hydrogenation, noble metals exhibit excellent catalytic activity, but are expensive, have limited reserves, and are easily sulfided. Non-noble metal nickel has inexpensive and sulfur-resistant qualities and has shown great potential for use in heterogeneous catalysis. However, it is known that it is difficult to form a non-noble metal into ultra-small particles, and the non-noble metal catalyst has problems such as poor stability and low activity compared with noble metals. Therefore, the synthesis of the nano nickel catalyst with high dispersity, good stability and high activity has very important significance for reducing the cost of the hydrogenation dearomatization catalyst and improving the catalytic efficiency. The invention provides a high-dispersion supported nickel-based catalyst synthesized by an in-situ packaging method.
This patent introduces a method for in-situ encapsulation of non-noble metal Ni nanoparticles with MCM-41. Cetyl Trimethyl Ammonium Bromide (CTAB) forms hexagonally packed micelles in water and is a common template for synthesizing MCM-41. The organic group of the water-insoluble organic nickel is skillfully used in the patent and can interact with the organic end of CTAB. Therefore, although the water-insoluble organic nickel is insoluble in water, it is soluble in an aqueous solution of CTAB and can enter micelles of CTAB. Therefore, CTAB is not only a template agent for preparing MCM-41, but also a surfactant of organic nickel, and is also a template agent for preparing MCM-41SiO for connecting organic Ni with MCM-412A medium of a skeleton. In the invention, cheap water glass is used as a raw material, and conditions such as pH, temperature and the like of a reaction system are controlled, so that water-insoluble organic nickel can be effectively prevented from being hydrolyzed and firmly anchored in the CTAB micelle. After subsequent heat treatment and reduction, Ni particles are encapsulated in the pore channels, and the size of the Ni particles is only 2-4 nanometers. The synthesized high-dispersion supported nickel-based catalyst has higher thermal stability and shows high activity in the naphthalene hydrogenation dearomatization reaction. In particular, the selectivity to trans-decalin is as high as 95%, and this selectivity ratio is the highest as we know.
Disclosure of Invention
In order to prepare the ultra-small Ni nano-particles with good stability and high dispersity and further improve the aromatic hydrogenation activity and the product selectivity of the catalyst, the invention provides a novel high-dispersity supported nickel-based synthesis method and a use method thereof in aromatic hydrogenation catalysis.
The technical scheme adopted by the invention is as follows:
scheme 1: a preparation method of a high-dispersion supported nickel-based catalyst is characterized by comprising the following steps:
(1) completely dissolving Cetyl Trimethyl Ammonium Bromide (CTAB) in deionized water under mechanical stirring at 60 ‒ 80 deg.C, adding water-insoluble organic nickel, stirring for no more than 2 hr to dissolve completely, adding water glass solution, and stirring for no more than 0.5 hr to obtain solution A; wherein the mol ratio of the addition amount of the water-insoluble organic nickel, the water glass, the hexadecyl trimethyl ammonium bromide and the deionized water is 0.005 ‒ 0.08Ni to 1SiO2 : 0.08‒0.15CTAB : 40‒80H2O; wherein the silicon content of the water glass is within the range of 2.4 ‒ 2.6.6 mol/kg, and the molar ratio of Si to Na is within the range of 3.2 ‒ 3.6.6;
(2) dropwise adding analytically pure concentrated hydrochloric acid to adjust the pH value of the solution A to 9 ‒ 11, and continuously mechanically stirring for at least 1 hour to obtain slurry B;
(3) putting the slurry B into an autoclave with a polytetrafluoroethylene lining, crystallizing at 130 ℃ for 3 ‒ 7 hours, cooling to room temperature, washing the obtained sample to be neutral by using deionized water, and drying the obtained filter cake at 120 ℃ to obtain a precursor;
(4) roasting the precursor for 2 ‒ 3 hours at 550 ‒ 600 ℃ in a muffle furnace under the air atmosphere, and then reducing the obtained sample for at least 1 hour at 450 ‒ 550 ℃ in a hydrogen atmosphere to obtain a high-dispersion supported nickel-based catalyst; wherein the mass of Ni accounts for 0.1 percent ‒ 5 percent of the mass of the catalyst.
Scheme 2: the preparation method of the high-dispersion supported nickel-based catalyst in the scheme 1 is characterized in that the water-insoluble organic nickel is one or more of nickel acetylacetonate, nickelocene and nickel stearate.
Scheme 3: a preparation method of a high-dispersion supported nickel-based catalyst is characterized by comprising the following steps:
(1) completely dissolving Cetyl Trimethyl Ammonium Bromide (CTAB) in deionized water under mechanical stirring at 60-80 deg.C, adding water-insoluble organic nickel, stirring for no more than 2 hr to dissolve completely, adding water glass solution, and stirring for no more than 0.5 hr to obtain solution A; wherein the mol ratio of the addition amount of the water-insoluble organic nickel, the water glass, the hexadecyl trimethyl ammonium bromide and the deionized water is 0.005 ‒ 0.08Ni to 1SiO2 : 0.08‒0.15CTAB : 40‒80H2O; wherein the silicon content of the water glass is within the range of 2.4 ‒ 2.6.6 mol/kg, and the molar ratio of Si to Na is within the range of 3.2 ‒ 3.6.6;
(2) dropwise adding analytically pure concentrated hydrochloric acid to adjust the pH value of the solution A to 9 ‒ 11, and continuously mechanically stirring for at least 1 hour to obtain slurry B;
(3) putting the slurry B into an autoclave with a polytetrafluoroethylene lining, crystallizing at 130 ℃ for 3 ‒ 7 hours, cooling to room temperature, washing the obtained sample to be neutral by using deionized water, and drying the obtained filter cake at 120 ℃ to obtain a precursor;
(4) roasting the precursor for 2 ‒ 3 hours at 350 ‒ 400 ℃ in the air atmosphere of a tubular furnace, and then reducing the obtained sample for at least 1 hour at 450 ‒ 550 ℃ in the hydrogen atmosphere to obtain a high-dispersion supported nickel-based catalyst; wherein the mass of Ni accounts for 0.1 percent ‒ 5 percent of the mass of the catalyst.
Scheme 4: the preparation method of the high-dispersion supported nickel-based catalyst in the scheme 3 is characterized in that the water-insoluble organic nickel is one or more of nickel acetylacetonate, nickelocene and nickel stearate.
Scheme 5: a preparation method of a high-dispersion supported nickel-based catalyst is characterized by comprising the following steps:
(1) completely dissolving Cetyl Trimethyl Ammonium Bromide (CTAB) in deionized water under mechanical stirring at 60-80 deg.C, adding water-insoluble organic nickel, stirring for no more than 2 hr to dissolve completely, adding water glass solution, and stirring for no more than 0.5 hr to obtain solution A; wherein the mol ratio of the addition amount of the water-insoluble organic nickel, the water glass, the hexadecyl trimethyl ammonium bromide and the deionized water is 0.005 ‒ 0.08Ni to 1SiO2 : 0.08‒0.15CTAB : 40‒80H2O; wherein the silicon content of the water glass is within the range of 2.4 ‒ 2.6.6 mol/kg, and the molar ratio of Si to Na is within the range of 3.2 ‒ 3.6.6;
(2) dropwise adding analytically pure concentrated hydrochloric acid to adjust the pH value of the solution A to 9 ‒ 11, and continuously mechanically stirring for at least 1 hour to obtain slurry B;
(3) putting the slurry B into an autoclave with a polytetrafluoroethylene lining, crystallizing at 130 ℃ for 3 ‒ 7 hours, cooling to room temperature, washing the obtained sample to be neutral by using deionized water, and drying the obtained filter cake at 120 ℃ to obtain a precursor;
(4) roasting the precursor for 4 ‒ 6 hours at 400 ‒ 600 ℃ in a tubular furnace under the atmosphere of inert gas, and then reducing the obtained sample for at least 1 hour at 450 ‒ 550 ℃ in a hydrogen atmosphere to obtain a high-dispersion supported nickel-based catalyst; wherein the mass of Ni accounts for 0.1 percent ‒ 5 percent of the mass of the catalyst.
Scheme 6: the preparation method of the high-dispersion supported nickel-based catalyst in the scheme 5 is characterized in that the water-insoluble organic nickel is one or more of nickel acetylacetonate, nickelocene and nickel stearate.
Scheme 7: a highly dispersed supported nickel-based catalyst, characterized by being prepared using the preparation method of any one of scheme 1 ‒ 6.
Compared with the prior hydrogenation catalyst and the preparation method thereof, the invention has the following innovation:
(1) a template agent (CTAB) used for synthesizing MCM-41 is used as a surfactant and an encapsulant of organic nickel, and the organic nickel is wrapped in hydrophobic cores of template micelles by an in-situ synthesis method.
CTAB has hydrophobic end and hydrophilic end at the same time, when dissolved in water, the hydrophobic ends are gathered together to form micelles, and the micelles are in hexagonal close packing. CTAB is used as MCM-41 template agent and is coated with SiO in the process of synthesizing MCM-412Wrapping the inner part, and then roasting and removing CTAB to obtain SiO with ordered pore canals2A porous material. In the process of this patent, CTAB is used ingeniously as a surfactant for organic nickel. The water-insoluble organic nickel is insoluble in water because it has a hydrophobic group. But the organo-nickel is soluble in aqueous solutions of CTAB because it can enter into the hydrophobic gel core of CTAB. The organic nickel is thus SiO together with CTAB2And (4) wrapping. After subsequent heat treatment and reduction, the Ni nanoparticles are packaged and anchored in the MCM-41 pore channels, and the obtained Ni particles have high dispersity and the size of only 2-4 nanometers.
(2) Cheap water glass is used as a raw material, and the modulus of the water glass needs to be strictly limited within a certain range.
The traditional MCM-41 synthesis method utilizes tetraethoxysilane as a silicon source, and has high cost. In the method of the patent, water glass is used as a silicon source, and the price is relatively low. The sodium ion of the water glass affects the combination of the silicon oxide group and the CTAB positive ion, so the sodium content in the water glass cannot be too high, and the molar ratio of Si to Na needs to be strictly limited within the range of 3.1 ‒ 3.6.6.
(3) The template agent in the pore channel is carbonized, so that the Ni nano particles can be fixed, and the thermal stability of the catalyst is greatly improved.
The traditional method is generally to completely remove the template agent in the pore channel and then apply the template agent in the catalytic reaction. The patent proposes that the template agent is carbonized, the Ni nano particles in the pore channels are stabilized spatially, and the thermal stability of the catalyst is greatly improved.
The prepared supported nickel-based catalyst has high-dispersion ultra-small Ni nano-particles. The small size of the active component can expose more catalytically active sites, resulting in a substantial increase in catalytic activity. The high-dispersion supported nickel-based catalyst shows high activity and selectivity in naphthalene hydrodearomatization reaction.
Drawings
FIG. 1: scanning electron micrograph of Cat-2 prepared in example 2.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the embodiments. It should be noted that the following examples are only for explaining the present invention and should not be construed as limiting the scope of the practice of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Example 1
(1) Under the mechanical stirring of 65 ℃, 4.4 g of CTAB is completely dissolved in 86.4 g of deionized water, then 0.79 g of nickel acetylacetonate is added into the CTAB aqueous solution, and the stirring is continued for 1 hour to completely dissolve the nickel acetylacetonate; wherein the molar ratio of nickel acetylacetonate, CTAB and deionized water is 0.025 Ni: 0.1 CTAB: 80H2O；
(2) Adding 48.0 g of water glass into the solution, and mechanically stirring for 0.5 hour; wherein the Si content of the water glass is 2.5 mol/g, and the molar ratio of Si to Na is 3.6; wherein the molar ratio of the water glass to the nickel acetylacetonate is 1 Si: 0.025 Ni;
(3) dropwise adding analytically pure concentrated hydrochloric acid to adjust the pH value of the solution to 10, and continuously stirring for 1 hour to obtain slurry;
(4) putting the obtained slurry into an autoclave with a polytetrafluoroethylene lining, crystallizing for 5 hours at 130 ℃, cooling to room temperature, washing the obtained sample to be neutral by using deionized water, and drying the filter cake at 120 ℃ to obtain a precursor;
(5) roasting the precursor for 2 hours at 600 ℃ in a muffle furnace under the air atmosphere, and then reducing the obtained sample for 2 hours at 500 ℃ in a hydrogen atmosphere to obtain a high-dispersion supported nickel-based catalyst; wherein the mass of Ni comprises 2.5 wt.% of the catalyst; the obtained catalyst was numbered Cat-1.
Example 2
(1) Under the mechanical stirring of 65 ℃, 4.4 g of CTAB is completely dissolved in 86.4 g of deionized water, then 1.01 g of nickel acetylacetonate is added into the CTAB aqueous solution, and the stirring is continued for 1 hour, so that the nickel acetylacetonate is completely dissolved; wherein the molar ratio of nickel acetylacetonate, CTAB and deionized water is 0.03 Ni: 0.1 CTAB: 80H2O；
(2) Adding 48.0 g of water glass into the solution, and mechanically stirring for 0.5 hour; wherein the Si content of the water glass is 2.5 mol/g, and the molar ratio of Si to Na is 3.6; wherein the molar ratio of the water glass to the nickel acetylacetonate is 1 Si: 0.03 Ni;
(3) dropwise adding analytically pure concentrated hydrochloric acid to adjust the pH value of the solution to 10, and continuously stirring for 1 hour to obtain slurry;
(4) putting the obtained slurry into an autoclave with a polytetrafluoroethylene lining, crystallizing for 5 hours at 130 ℃, cooling to room temperature, washing the obtained sample to be neutral by using deionized water, and drying the filter cake at 120 ℃ to obtain a precursor;
(5) roasting the precursor for 2 hours at 600 ℃ in a muffle furnace under the air atmosphere, and then reducing the obtained sample for 2 hours at 500 ℃ in a hydrogen atmosphere to obtain a high-dispersion supported nickel-based catalyst; wherein the mass of Ni comprises 3.5 wt.% of the catalyst; the resulting catalyst was numbered Cat-2.
Example 3
(1) Under the mechanical stirring of 80 ℃, 6.6 g of CTAB is completely dissolved in 86.4 g of deionized water, then 1.58 g of nickel acetylacetonate is added into the CTAB aqueous solution, and the stirring is continued for 1 hour, so that the nickel acetylacetonate is completely dissolved; wherein the mol of nickel acetylacetonate, CTAB and deionized waterThe molar ratio was 0.05 Ni: 0.15 CTAB: 80H2O；
(2) Adding 48.0 g of water glass into the solution, and mechanically stirring for 0.5 hour; wherein the Si content of the water glass is 2.5 mol/g, and the molar ratio of Si to Na is 3.6; wherein the molar ratio of the water glass to the nickel acetylacetonate is 1 Si: 0.05 Ni;
(3) dropwise adding analytically pure concentrated hydrochloric acid to adjust the pH value of the solution to 10, and continuously stirring for 1 hour to obtain slurry;
(4) putting the obtained slurry into an autoclave with a polytetrafluoroethylene lining, crystallizing for 5 hours at 130 ℃, cooling to room temperature, washing the obtained sample to be neutral by using deionized water, and drying the filter cake at 120 ℃ to obtain a precursor;
(5) roasting the precursor for 2 hours at 600 ℃ in a muffle furnace under the air atmosphere, and then reducing the obtained sample for 2 hours at 500 ℃ in a hydrogen atmosphere to obtain a high-dispersion supported nickel-based catalyst; wherein the mass of Ni comprises 5 wt.% of the catalyst; the obtained catalyst was numbered Cat-3.
Example 4
(1) Under the mechanical stirring of 80 ℃, 5.2 g of CTAB is completely dissolved in 86.4 g of deionized water, then 1.58 g of nickel acetylacetonate is added into the CTAB aqueous solution, and the stirring is continued for 1 hour, so that the nickel acetylacetonate is completely dissolved; wherein the molar ratio of nickel acetylacetonate, CTAB and deionized water is 0.03 Ni: 0.12 CTAB: 80H2O；
(2) Adding 28.8 g of water glass into the solution, and mechanically stirring for 0.5 hour; wherein the Si content of the water glass is 4.2 mol/g, and the molar ratio of Si to Na is 3.1; wherein the molar ratio of the water glass to the nickel acetylacetonate is 1 Si: 0.03 Ni;
(3) dropwise adding analytically pure concentrated hydrochloric acid to adjust the pH value of the solution to 10, and continuously stirring for 1 hour to obtain slurry;
(4) putting the obtained slurry into an autoclave with a polytetrafluoroethylene lining, crystallizing for 5 hours at 130 ℃, cooling to room temperature, washing the obtained sample to be neutral by using deionized water, and drying the filter cake at 120 ℃ to obtain a precursor;
(5) roasting the precursor for 2 hours at 550 ℃ in a muffle furnace under the air atmosphere, and then reducing the obtained sample for 2 hours at 500 ℃ in a hydrogen atmosphere to obtain a high-dispersion supported nickel-based catalyst; wherein the mass of Ni comprises 3.5 wt.% of the catalyst; the resulting catalyst was numbered Cat-4.
Example 5
(1) Under the mechanical stirring of 80 ℃, 6.6 g of CTAB is completely dissolved in 86.4 g of deionized water, then 1.13 g of nickelocene is added into the CTAB aqueous solution, and the stirring is continued for 1 hour, so that the nickelocene is completely dissolved;
(2) adding 28.8 g of water glass into the solution, and mechanically stirring for 0.5 hour; wherein the Si content of the water glass is 4.2 mol/g, and the molar ratio of Si to Na is 3.1; wherein the molar ratio of the water glass to the nickelocene is 1 Si: 0.05 Ni;
(3) dropwise adding analytically pure concentrated hydrochloric acid to adjust the pH value of the solution to 10, and continuously stirring for 1 hour to obtain slurry;
(4) putting the obtained slurry into an autoclave with a polytetrafluoroethylene lining, crystallizing for 5 hours at 130 ℃, cooling to room temperature, washing the obtained sample to be neutral by using deionized water, and drying the filter cake at 120 ℃ to obtain a precursor;
(5) roasting the precursor for 2 hours at 350 ℃ in a muffle furnace under the air atmosphere, and then reducing the obtained sample for 2 hours at 450 ℃ in a hydrogen atmosphere to obtain a high-dispersion supported nickel-based catalyst; wherein the mass of Ni comprises 5 wt.% of the catalyst; the obtained catalyst was numbered Cat-5.
Example 6
(1) Under the mechanical stirring of 80 ℃, 6.6 g of CTAB is completely dissolved in 86.4 g of deionized water, then 1.58 g of nickel acetylacetonate is added into the CTAB aqueous solution, and the stirring is continued for 1 hour, so that the nickel acetylacetonate is completely dissolved;
(2) adding 28.8 g of water glass into the solution, and mechanically stirring for 0.5 hour; wherein the Si content of the water glass is 4.2 mol/g, and the molar ratio of Si to Na is 3.1; wherein the molar ratio of the water glass to the nickel acetylacetonate is 1 Si: 0.05 Ni;
(3) dropwise adding analytically pure concentrated hydrochloric acid to adjust the pH value of the solution to 10, and continuously stirring for 1 hour to obtain slurry;
(4) putting the obtained slurry into an autoclave with a polytetrafluoroethylene lining, crystallizing for 5 hours at 130 ℃, cooling to room temperature, washing the obtained sample to be neutral by using deionized water, and drying the filter cake at 120 ℃ to obtain a precursor;
(5) roasting the precursor for 2 hours at 400 ℃ in a muffle furnace under the air atmosphere, and then reducing the obtained sample for 2 hours at 500 ℃ in a hydrogen atmosphere to obtain a high-dispersion supported nickel-based catalyst; wherein the mass of Ni comprises 4.8 wt.% of the catalyst; the resulting catalyst was numbered Cat-6.
Example 7
(1) Under the mechanical stirring of 65 ℃, 4.4 g of CTAB is completely dissolved in 86.4 g of deionized water, then 0.79 g of nickel acetylacetonate is added into the CTAB aqueous solution, and the stirring is continued for 1 hour to completely dissolve the nickel acetylacetonate; wherein the molar ratio of nickel acetylacetonate, CTAB and deionized water is 0.025 Ni: 0.1 CTAB: 80H2O；
(2) Adding 48.0 g of water glass into the solution, and mechanically stirring for 0.5 hour; wherein the Si content of the water glass is 2.5 mol/g, and the molar ratio of Si to Na is 3.6; wherein the molar ratio of the water glass to the nickel acetylacetonate is 1 Si: 0.025 Ni;
(3) dropwise adding analytically pure concentrated hydrochloric acid to adjust the pH value of the solution to 10, and continuously stirring for 1 hour to obtain slurry;
(4) putting the obtained slurry into an autoclave with a polytetrafluoroethylene lining, crystallizing for 5 hours at 130 ℃, cooling to room temperature, washing the obtained sample to be neutral by using deionized water, and drying the filter cake at 120 ℃ to obtain a precursor;
(5) roasting the precursor for 4 hours at 600 ℃ in a tubular furnace under the nitrogen atmosphere, and then reducing the obtained sample for 2 hours at 500 ℃ in the hydrogen atmosphere to obtain a high-dispersion supported nickel-based catalyst; wherein the mass of Ni comprises 2.5 wt.% of the catalyst; the resulting catalyst was numbered Cat-7.
Example 8
(1) Under mechanical stirring at 65 DEG CCompletely dissolving 4.4 g of CTAB in 86.4 g of deionized water, then adding 1.01 g of nickel acetylacetonate into the CTAB aqueous solution, and continuously stirring for 1 hour to completely dissolve the nickel acetylacetonate; wherein the molar ratio of nickel acetylacetonate, CTAB and deionized water is 0.03 Ni: 0.1 CTAB: 80H2O；
(2) Adding 48.0 g of water glass into the solution, and mechanically stirring for 0.5 hour; wherein the Si content of the water glass is 2.5 mol/g, and the molar ratio of Si to Na is 3.6; wherein the molar ratio of the water glass to the nickel acetylacetonate is 1 Si: 0.03 Ni;
(3) dropwise adding analytically pure concentrated hydrochloric acid to adjust the pH value of the solution to 10, and continuously stirring for 1 hour to obtain slurry;
(4) putting the obtained slurry into an autoclave with a polytetrafluoroethylene lining, crystallizing for 5 hours at 130 ℃, cooling to room temperature, washing the obtained sample to be neutral by using deionized water, and drying the filter cake at 120 ℃ to obtain a precursor;
(5) roasting the precursor for 6 hours at 400 ℃ in a helium atmosphere in a tube furnace, and then reducing the obtained sample for 2 hours at 500 ℃ in a hydrogen atmosphere to obtain a high-dispersion supported nickel-based catalyst; wherein the mass of Ni comprises 3.5 wt.% of the catalyst; the obtained catalyst was numbered Cat-8.
Comparative example 1
Nickel nitrate hexahydrate is used as a nickel source to synthesize the supported nickel-based catalyst in situ, and the purpose is to compare with example 3 and understand the influence of the synthesized catalyst on the hydrogenation and dearomatization activity and selectivity.
(1) Under the mechanical stirring of 80 ℃, 6.6 g of CTAB is completely dissolved in 86.4 g of deionized water, then 0.37 g of nickel nitrate hexahydrate is added into the CTAB aqueous solution, and the stirring is continued for 1 hour to ensure that the nickel nitrate hexahydrate is completely dissolved; wherein the molar ratio of nickel nitrate to CTAB to deionized water is 0.05 Ni: 0.15 CTAB: 80H2O；
(2) Adding 48.0 g of water glass into the solution, and mechanically stirring for 0.5 hour; wherein the Si content of the water glass is 2.5 mol/g, and the molar ratio of Si to Na is 3.6; wherein the molar ratio of the water glass to the nickel nitrate is 1 Si: 0.05 Ni;
(3) dropwise adding analytically pure concentrated hydrochloric acid to adjust the pH value of the solution to 10, and continuously stirring for 1 hour to obtain slurry;
(4) putting the obtained slurry into an autoclave with a polytetrafluoroethylene lining, crystallizing for 5 hours at 130 ℃, cooling to room temperature, washing the obtained sample to be neutral by using deionized water, and drying the filter cake at 120 ℃ to obtain a precursor;
(5) roasting the precursor for 2 hours at 600 ℃ in a muffle furnace under the air atmosphere, and then reducing the obtained sample for 2 hours at 500 ℃ in a hydrogen atmosphere to obtain a supported nickel-based catalyst; wherein the mass of Ni comprises 5 wt.% of the catalyst; the resulting catalyst was numbered Cat-9.
Comparative example 2
The Ni/MCM-41 catalyst is synthesized by a traditional impregnation method, aiming at comparing with the example 3 to understand the influence of the synthesized catalyst on the hydrogenation dearomatization activity and selectivity.
(1) Preparing MCM-41 by adopting the same raw materials and preparation method of Cat-3 except that nickel acetylacetonate is not added;
(2) 0.743 g of nickel chloride hexahydrate is dissolved in 3.3 g of deionized water;
(3) soaking the nickel chloride solution into 3 g of MCM-41 by adopting an isometric soaking method, drying at 120 ℃, and roasting at 600 ℃ for 2 hours in a muffle furnace in air atmosphere;
(4) reducing the obtained sample for 2 hours at 500 ℃ in a hydrogen atmosphere to obtain a Ni/MCM-41 catalyst; wherein the mass of Ni comprises 5 wt.% of the catalyst; the resulting catalyst was numbered Cat-10.
Table 1 shows the results of catalytic evaluation of naphthalene hydrodearomatization with Cat-1 to Cat-10 catalysts. The specific catalyst reaction conditions are as follows: the raw material is 5 wt.% naphthalene/cyclohexane solution, and the reaction temperature of the catalyst is 180 ℃; the pressure is 3.0 MPa, and the volume space velocity of the liquid raw material is 1 h‒1The volume ratio of hydrogen to oil was 500.
TABLE 1
| Catalyst numbering | Naphthalene conversion (%) | Decalin selectivity (%) |
| Cat-1 | 80.1 | 88.5 |
| Cat-2 | 91.9 | 98.9 |
| Cat-3 | 100.0 | 100.0 |
| Cat-4 | 92.1 | 98.3 |
| Cat-5 | 95.3 | 80.9 |
| Cat-6 | 93.1 | 83.2 |
| Cat-7 | 80.6 | 87.2 |
| Cat-8 | 90.8 | 90.3 |
| Cat-9 | 68.2 | 76.1 |
| Cat-10 | 60.1 | 75.6 |
Claims (7)
1. A preparation method of a high-dispersion supported nickel-based catalyst is characterized by comprising the following steps:
(1) completely dissolving Cetyl Trimethyl Ammonium Bromide (CTAB) in deionized water under mechanical stirring at 60 ‒ 80 deg.C, adding water-insoluble organic nickel, stirring for no more than 2 hr to dissolve completely, adding water glass solution, and stirring for no more than 0.5 hr to obtain solution A; wherein the mol ratio of the addition amount of the water-insoluble organic nickel, the water glass, the hexadecyl trimethyl ammonium bromide and the deionized water is 0.005 ‒ 0.08Ni to 1SiO2 : 0.08‒0.15CTAB : 40‒80H2O; wherein the silicon content of the water glass is in the range of 2.4 ‒ 2.6.6 mol/kg, and the molar ratio of Si to Na is in the range of 3.1 ‒ 3.6.6;
(2) dropwise adding analytically pure concentrated hydrochloric acid to adjust the pH value of the solution A to 9 ‒ 11, and continuously mechanically stirring for at least 1 hour to obtain slurry B;
(3) putting the slurry B into an autoclave with a polytetrafluoroethylene lining, crystallizing at 130 ℃ for 3 ‒ 7 hours, cooling to room temperature, washing the obtained sample to be neutral by using deionized water, and drying the obtained filter cake at 120 ℃ to obtain a precursor;
(4) roasting the precursor for 2 ‒ 3 hours at 550 ‒ 600 ℃ in a muffle furnace under the air atmosphere, and then reducing the obtained sample for at least 1 hour at 450 ‒ 550 ℃ in a hydrogen atmosphere to obtain a high-dispersion supported nickel-based catalyst; wherein the mass of Ni accounts for 0.1 percent ‒ 5 percent of the mass of the catalyst.
2. The preparation method of the high-dispersion supported nickel-based catalyst according to claim 1, wherein the water-insoluble organic nickel is one or more of nickel acetylacetonate, nickelocene and nickel stearate.
3. A preparation method of a high-dispersion supported nickel-based catalyst is characterized by comprising the following steps:
(1) completely dissolving Cetyl Trimethyl Ammonium Bromide (CTAB) in deionized water under mechanical stirring at 60 ‒ 80 deg.C, adding water-insoluble organic nickel, stirring for no more than 2 hr to dissolve completely, adding water glass solution, and stirring for no more than 0.5 hr to obtain solution A; wherein the mol ratio of the addition amount of the water-insoluble organic nickel, the water glass, the hexadecyl trimethyl ammonium bromide and the deionized water is 0.005 ‒ 0.08Ni to 1SiO2 : 0.08‒0.15CTAB : 40‒80H2O; wherein the silicon content of the water glass is within the range of 2.4 ‒ 2.6.6 mol/kg, and the molar ratio of Si to Na is within the range of 3.2 ‒ 3.6.6;
(2) dropwise adding analytically pure concentrated hydrochloric acid to adjust the pH value of the solution A to 9 ‒ 11, and continuously mechanically stirring for at least 1 hour to obtain slurry B;
(3) putting the slurry B into an autoclave with a polytetrafluoroethylene lining, crystallizing at 130 ℃ for 3 ‒ 7 hours, cooling to room temperature, washing the obtained sample to be neutral by using deionized water, and drying the obtained filter cake at 120 ℃ to obtain a precursor;
(4) roasting the precursor for 2 ‒ 3 hours at 350 ‒ 400 ℃ in a muffle furnace under the air atmosphere, and then reducing the obtained sample for at least 1 hour at 450 ‒ 550 ℃ in a hydrogen atmosphere to obtain a high-dispersion supported nickel-based catalyst; wherein the mass of Ni accounts for 0.1 percent ‒ 5 percent of the mass of the catalyst.
4. The preparation method of the high-dispersion supported nickel-based catalyst according to claim 3, wherein the water-insoluble organic nickel is one or more of nickel acetylacetonate, nickelocene and nickel stearate.
5. A preparation method of a high-dispersion supported nickel-based catalyst is characterized by comprising the following steps:
(1) completely dissolving Cetyl Trimethyl Ammonium Bromide (CTAB) in deionized water under mechanical stirring at 60 ‒ 80 deg.C, adding water-insoluble organic nickel, stirring for no more than 2 hr to dissolve completely, adding water glass solution, and stirring for no more than 0.5 hr to obtain solution A; wherein the mol ratio of the addition amount of the water-insoluble organic nickel, the water glass, the hexadecyl trimethyl ammonium bromide and the deionized water is 0.005 ‒ 0.08Ni to 1SiO2 : 0.08‒0.15CTAB : 40‒80H2O; wherein the silicon content of the water glass is in the range of 2.4 ‒ 2.6.6 mol/kg, and the molar ratio of Si to Na is in the range of 3.1 ‒ 3.6.6;
(2) dropwise adding analytically pure concentrated hydrochloric acid to adjust the pH value of the solution A to 9 ‒ 11, and continuously mechanically stirring for at least 1 hour to obtain slurry B;
(3) putting the slurry B into an autoclave with a polytetrafluoroethylene lining, crystallizing at 130 ℃ for 3 ‒ 7 hours, cooling to room temperature, washing the obtained sample to be neutral by using deionized water, and drying the obtained filter cake at 120 ℃ to obtain a precursor;
(4) roasting the precursor for 4 ‒ 6 hours at 400 ‒ 600 ℃ under an inert atmosphere in a tube furnace, and then reducing the obtained sample for at least 1 hour at 450 ‒ 550 ℃ under a hydrogen atmosphere to obtain a high-dispersion supported nickel-based catalyst; wherein the mass of Ni accounts for 0.1 percent ‒ 5 percent of the mass of the catalyst.
6. The preparation method of the high-dispersion supported nickel-based catalyst of claim 5, wherein the water-insoluble organic nickel is one or more of nickel acetylacetonate, nickelocene and nickel stearate.
7. A highly dispersed supported nickel-based catalyst, characterized by being produced by the production method according to any one of claims 1 ‒ 6.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103055868A (en) * | 2011-10-24 | 2013-04-24 | 中国石油化工股份有限公司 | Nickel-based catalyst and preparation method thereof |
| CN103861596A (en) * | 2012-12-10 | 2014-06-18 | 正大能源材料(大连)有限公司 | Preparation method of nickel-based hydrogenation catalyst |
| CN105727957A (en) * | 2014-12-09 | 2016-07-06 | 中国科学院大连化学物理研究所 | Loaded type iron-nickel phosphide catalyst material and application thereof |
| CN106975506A (en) * | 2017-03-14 | 2017-07-25 | 上海大学 | Boron nitride composite mesopore oxide nickel-base catalyst and preparation method thereof |
| CN108607600A (en) * | 2016-12-10 | 2018-10-02 | 中国科学院大连化学物理研究所 | A kind of catalyst of molecular sieve carried high dispersive noble metal and its preparation and application |
-
2018
- 2018-11-23 CN CN201811403331.4A patent/CN109317186B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103055868A (en) * | 2011-10-24 | 2013-04-24 | 中国石油化工股份有限公司 | Nickel-based catalyst and preparation method thereof |
| CN103861596A (en) * | 2012-12-10 | 2014-06-18 | 正大能源材料(大连)有限公司 | Preparation method of nickel-based hydrogenation catalyst |
| CN105727957A (en) * | 2014-12-09 | 2016-07-06 | 中国科学院大连化学物理研究所 | Loaded type iron-nickel phosphide catalyst material and application thereof |
| CN108607600A (en) * | 2016-12-10 | 2018-10-02 | 中国科学院大连化学物理研究所 | A kind of catalyst of molecular sieve carried high dispersive noble metal and its preparation and application |
| CN106975506A (en) * | 2017-03-14 | 2017-07-25 | 上海大学 | Boron nitride composite mesopore oxide nickel-base catalyst and preparation method thereof |
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