WO2018227842A1 - Catalyseur utilisé pour produire un biocarburant riche en aromatiques, et son procédé de préparation - Google Patents
Catalyseur utilisé pour produire un biocarburant riche en aromatiques, et son procédé de préparation Download PDFInfo
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- WO2018227842A1 WO2018227842A1 PCT/CN2017/107943 CN2017107943W WO2018227842A1 WO 2018227842 A1 WO2018227842 A1 WO 2018227842A1 CN 2017107943 W CN2017107943 W CN 2017107943W WO 2018227842 A1 WO2018227842 A1 WO 2018227842A1
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- Prior art keywords
- biochar
- catalyst
- lignin
- rich
- solution
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- 239000003054 catalyst Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000002551 biofuel Substances 0.000 title claims abstract description 16
- 125000003118 aryl group Chemical group 0.000 title claims abstract description 15
- 229920005610 lignin Polymers 0.000 claims abstract description 37
- 238000000197 pyrolysis Methods 0.000 claims abstract description 29
- 239000000843 powder Substances 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 150000003751 zinc Chemical class 0.000 claims abstract description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 239000008367 deionised water Substances 0.000 claims abstract description 7
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 7
- 239000001257 hydrogen Substances 0.000 claims abstract description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 5
- 239000011701 zinc Substances 0.000 claims description 11
- 239000000047 product Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000010453 quartz Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 238000000967 suction filtration Methods 0.000 claims description 5
- 229910052723 transition metal Inorganic materials 0.000 claims description 5
- 150000003624 transition metals Chemical class 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 230000035484 reaction time Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000001354 calcination Methods 0.000 claims description 2
- 239000000356 contaminant Substances 0.000 claims description 2
- 239000012467 final product Substances 0.000 claims description 2
- 239000011236 particulate material Substances 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims description 2
- 230000000717 retained effect Effects 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims 1
- 239000008187 granular material Substances 0.000 claims 1
- 238000001291 vacuum drying Methods 0.000 claims 1
- 239000012075 bio-oil Substances 0.000 abstract description 14
- 238000007233 catalytic pyrolysis Methods 0.000 abstract description 5
- 238000002425 crystallisation Methods 0.000 abstract description 3
- 230000008025 crystallization Effects 0.000 abstract description 3
- 239000002028 Biomass Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical group [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 8
- 229910052725 zinc Inorganic materials 0.000 description 8
- 239000004698 Polyethylene Substances 0.000 description 7
- 229920000573 polyethylene Polymers 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- JMFRWRFFLBVWSI-NSCUHMNNSA-N coniferol Chemical compound COC1=CC(\C=C\CO)=CC=C1O JMFRWRFFLBVWSI-NSCUHMNNSA-N 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000002290 gas chromatography-mass spectrometry Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 235000005985 organic acids Nutrition 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 239000012265 solid product Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- LZFOPEXOUVTGJS-ONEGZZNKSA-N trans-sinapyl alcohol Chemical compound COC1=CC(\C=C\CO)=CC(OC)=C1O LZFOPEXOUVTGJS-ONEGZZNKSA-N 0.000 description 2
- 229910000314 transition metal oxide Inorganic materials 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 229920002488 Hemicellulose Polymers 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 240000000111 Saccharum officinarum Species 0.000 description 1
- 235000007201 Saccharum officinarum Nutrition 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011942 biocatalyst Substances 0.000 description 1
- 238000001833 catalytic reforming Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- LZFOPEXOUVTGJS-UHFFFAOYSA-N cis-sinapyl alcohol Natural products COC1=CC(C=CCO)=CC(OC)=C1O LZFOPEXOUVTGJS-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229940119526 coniferyl alcohol Drugs 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000002366 mineral element Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000004626 scanning electron microscopy Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical class [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
Images
Classifications
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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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/06—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of zinc, cadmium or mercury
-
- 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
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
-
- 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
- B01J37/02—Impregnation, coating or precipitation
-
- 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
- B01J37/06—Washing
-
- 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
- B01J37/08—Heat treatment
- B01J37/082—Decomposition and pyrolysis
- B01J37/084—Decomposition of carbon-containing compounds into carbon
-
- 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
- B01J37/34—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
- B01J37/341—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation
- B01J37/344—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation of electromagnetic wave energy
- B01J37/346—Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation of electromagnetic wave energy of microwave energy
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G3/00—Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids
- C10G3/42—Catalytic treatment
- C10G3/44—Catalytic treatment characterised by the catalyst used
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G3/00—Production of liquid hydrocarbon mixtures from oxygen-containing organic materials, e.g. fatty oils, fatty acids
- C10G3/42—Catalytic treatment
- C10G3/44—Catalytic treatment characterised by the catalyst used
- C10G3/48—Catalytic treatment characterised by the catalyst used further characterised by the catalyst support
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
- Y02P30/20—Technologies relating to oil refining and petrochemical industry using bio-feedstock
Definitions
- the invention belongs to the technical field of biomass catalytic pyrolysis, and in particular relates to a catalyst for producing an aromatic-rich biofuel and a preparation method thereof.
- biomass energy resources including crops such as corn, wheat and rice, and residues of rice husk and sugar cane agricultural products, which can reach several hundred million tons per year.
- Biomass has been identified as the most promising raw material for the production of renewable energy.
- the yield and quality of the obtained liquid oil are low, the selectivity is poor, the catalyst activity is low, and it is easy to be deactivated. Therefore, it is necessary to increase the biomass pyrolysis liquid. The yield and quality of the product.
- Biochar is a solid product formed by high-temperature pyrolysis of biomass under anaerobic anoxic state, which itself contains some mineral elements. Alkali metal elements such as Ca, Mg, Zn, etc., in addition, biochar has developed voids and specific surface area. Therefore, this study is based on biochar products formed by microwave pyrolysis biomass and is subjected to transition metal oxides. Modification, preparation of a biochar catalyst, using this biochar catalyst to solve the problem of bio-oil yield and quality in pyrolysis experiments.
- Biomass consists mainly of cellulose, hemicellulose and lignin.
- lignin accounts for 25% and is the second most abundant organic matter in the world (cellulose is the first).
- Lignin is a complex phenolic polymer formed from three alcohol monomers (coumaryl alcohol, coniferyl alcohol, sinapyl alcohol).
- coumaryl alcohol, coniferyl alcohol, sinapyl alcohol a complex phenolic polymer formed from three alcohol monomers.
- coumaryl alcohol, coniferyl alcohol, sinapyl alcohol coumaryl alcohol, coniferyl alcohol, sinapyl alcohol
- this study intends to prepare lignin-derived biochar by microwave-assisted pyrolysis and load transition metal oxygen on the surface of biochar produced to regulate the physicochemical properties of lignin-derived biochar catalyst.
- the conversion rate of raw materials is increased, the formation of carbon deposits is reduced, and the activity, selectivity and service life of the catalyst are improved.
- the object of the present invention is to provide a catalyst for producing an aromatic hydrocarbon-rich biofuel and a preparation method thereof, so as to obtain a modified catalyst, thereby improving liquid yield and quality in biomass catalytic pyrolysis reaction, specifically in improving raw materials.
- the conversion rate and the chemical component selectivity of the bio-oil reduce the formation of catalyst coke and increase the activity and selectivity of the catalyst.
- the present invention uses lignin microwave pyrolysis to derive biochar as a catalyst carrier raw material, reveals the influence of the supported transition metal oxide on the prepared biochar catalyst, and analyzes the prepared transition metal by XRD, SEM and other analytical means.
- the microscopic morphology of the modified biochar catalyst, the combination of the active component and the carrier, and the distribution state are as follows:
- a method for preparing a catalyst for producing an aromatic-rich biofuel characterized by comprising the steps of:
- Step one microwave pyrolysis of lignin to obtain biochar;
- the lignin raw material is weighed according to the required amount and placed in a quartz flask reactor, and the microwave pyrolysis parameter is set to a reaction temperature of 500 ° C, and the microwave power is 750 W,
- the lignin pyrolysis reaction occurs more completely, so that pure biochar is obtained, and the reaction time is set to 30 minutes;
- Step 2 Preparation of biochar powder: The biochar is poured out from the quartz flask reactor and cooled to room temperature; since the lignin is pyrolyzed in the microwave, it is easy to form a block-like biochar product.
- the lignin-derived biochar produced by microwave pyrolysis is first pulverized into fine powder, and then sieved to ensure uniformity of size, thereby obtaining a biochar powder;
- Step three repeatedly washing the biochar powder with deionized water to remove contaminants from the biochar powder structure and open the surface pores of the biochar to obtain pure biochar powder;
- Step 4 drying the pure biochar powder in an oven at 105 ° C for 15 h to remove excess water to obtain a dried biochar powder;
- Step 5 dissolving the weighed zinc salt in deionized water to obtain a solution A, and adding the dried biochar powder to the solution A under continuous stirring to obtain a solution B; the metal element in the zinc salt The mass ratio is 5% of the selected biochar;
- Step six using a magnetic stirrer to continuously stir the solution B, to obtain a solution C;
- Step 7 the solution C is subjected to suction filtration and molding to obtain a shaped columnar particulate material, which is then dried in an oven to obtain a product 1;
- Step 8 calcining the product one through a high-temperature tube furnace in a mixed gas atmosphere of nitrogen and hydrogen to crystallize and shape, thereby preparing a final product, that is, a modified biochar catalyst loaded with a transition metal;
- the volume ratio of nitrogen to hydrogen in the mixture is 99:1.
- the lignin raw material in the first step is a commercial lignin.
- the zinc salt in the fifth step is Zn(NO 3 ) 2 .6H 2 O, and the mass ratio of the zinc salt to the dried biochar powder is 5%.
- Step 6 specifically, the solution B was placed on a magnetic stirrer, a magnetic stir bar was added to the solution, and stirring was continued for 6 hours in a water bath at 60 ° C.
- the step 7 is specifically: suction filtration, molding is to put a layer of filter paper in the Buchner funnel and then connect the Buchner funnel to the vacuum pump, and the solution C is suction filtered in the prepared Buchner funnel, and the filter paper is retained after the suction filtration.
- the residue was then made into a columnar particle having a diameter of 5 mm and a length of 7 mm using a plastic tube to facilitate use in experiments.
- Step 7 The drying conditions were specifically vacuum dried in an electric oven at 105 ° C for 15 h.
- step 8 in a tube furnace, a mixed gas having a flow rate of 60 mL/min was used to maintain an oxygen-deficient atmosphere, and crystallization was performed at a temperature of 550 ° C for 4 hours.
- a catalyst for producing an aromatic-rich biofuel which is produced by the above method.
- the present invention has a beneficial effect.
- the transition metal modified biochar catalyst prepared in the invention maintains the characteristic mode of the biochar topology, and the modified biochar catalyst still maintains a regular structure. It shows that the dispersibility of the modified biochar catalyst is still good.
- the XRD pattern of the biochar modified with zinc salt has a more prominent peak than the unmodified biochar catalyst, which is a high crystal formed by substances other than the framework material, and also indicates the peak. It is caused by the addition of zinc, while the other peaks are consistent with the peak of the biochar catalyst. From the SEM analysis, the main crystal particles and their agglomerates can be slightly changed in the sample with the addition of zinc salt. Compared with the biochar without metal addition, the single crystal size of the zinc-doped sample is slightly reduced, and the surface is slightly reduced. More smooth.
- Figure 1 is an XRD diffraction pattern of the effect of the zinc salt of the present invention on a modified biochar catalyst
- FIG. 3 is an analysis diagram of the bio-oil component of the modified catalyst and the un-catalyzed lignin/PE microwave co-pyrolysis reaction product of the present invention
- FIG. 4 is a flow chart of a method of the present invention.
- FIG. 40 g of the lignin biomass feedstock was weighed and placed in the reaction flask without the addition of a heating agent, so that the resulting coke was as pure as possible. Nitrogen gas was introduced for 15 min before the start of the experiment to maintain an oxygen-free atmosphere.
- the microwave pyrolysis parameter was set to a reaction temperature of 500 ° C and a microwave power of 750 W. In order to make the lignin pyrolysis reaction more complete, a relatively pure biochar was obtained, and the reaction time was set to 30 minutes. Since lignin is pyrolyzed in the microwave, it is easy to form a block-like biochar product.
- the lignin-derived biochar produced by microwave pyrolysis is first pulverized into fine powder and then sieved to ensure uniformity of size. Then, the biochar powder was repeatedly washed with deionized water. After washing, it was dried in an oven at 105 ° C for 15 h to remove excess water. This gave a biochar raw material for the preparation of the catalyst.
- the weighed 10.13 g of Zn(NO 3 ) 2 .6H 2 O was dissolved in excess deionized water, and 40 g of a biochar raw material was added thereto with constant stirring. The solution was placed on a magnetic stirrer and continuously stirred in a water bath at 60 ° C for 6 h.
- the mixture was filtered, molded, and the formed material was vacuum dried in an electric oven at 105 ° C for 15 h. Then, an oxygen-deficient atmosphere was maintained at a flow rate of 60 mL/min in a nitrogen-hydrogen mixed atmosphere (99:1), and crystallization was carried out at a temperature of 550 ° C for 4 hours to prepare a metal-supported biochar catalyst.
- XRD characterization was performed to compare the crystal characteristics of the metal zinc modified catalyst and the untreated catalyst, as shown in FIG.
- the modified molecular sieve catalyst maintains the characteristic pattern of the topological structure of the procatalyst, but a prominent peak formed by the addition of metallic zinc appears, indicating that the modified metallic zinc is loaded into the biochar catalyst.
- a catalytic pyrolysis experiment was carried out by using a catalytic fixed bed reactor in combination with a microwave pyrolysis apparatus.
- the raw material used in the test was lignin: firstly weighed 20 g of lignin and 5 g of PE as raw materials in a quartz flask reactor with a capacity of 500 ml, and then added 1 g of activated carbon as a microwave absorbing material and lignin/polyethylene (PE). The mixture was mixed, and the quartz flask reactor was placed in a microwave oven, and 1 g of the prepared catalyst was placed in a catalytic fixed bed reactor.
- the reaction temperature for setting microwave pyrolysis is 500 ° C, the time is 8 min, and the microwave power is 750 W.
- the pyrolysis gas is subjected to catalytic reforming reaction through a catalytic fixed bed after microwave pyrolysis reaction, and then rapidly condensed.
- the bio-oil was collected, and the organic components and catalysts of the bio-oil after the reaction were collected and analyzed by means of GC/MS, SEM and XRD.
- the microwave pyrolysis experiments of the uncharged catalyst and the added metal zinc modified biochar catalyst were compared. It was found that the catalyst used was significantly more than the bio-oil obtained without the catalyst.
- the effect of the catalyst on the bio-oil yield was: zinc-bio Carbon catalyst > no catalyst.
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Abstract
L'invention concerne un catalyseur utilisé pour produire un biocarburant riche en aromatiques, et son procédé de préparation. Le procédé comprend les étapes consistant à: former une matière première de biocharbon de lignine par pyrolyse par micro-ondes. Le sel de zinc pesé est dissous dans de l'eau désionisée en excès, et broyé, lavé, et la poudre de biocharbon séché est ajoutée pendant l'agitation; la solution est agitée en continu à l'aide d'un agitateur magnétique dans un bain d'eau à 60°C pendant 6 h; puis la solution est filtrée et formée, et est séchée pendant 15 h dans un four à 105°C; ensuite, la cristallisation et la formation sont effectuées dans une atmosphère de gaz mixte, d'azote et d'hydrogène (99 :1), dans un four à tube à 550°C, et un catalyseur à base de zinc-biocharbon modifié est ainsi préparé. Le catalyseur modifié augmente le rendement en bio-huile et la sélectivité des aromatiques obtenus par pyrolyse catalytique de lignine, et peut être appliqué à la technologie associée de conversion catalytique de pyrolyse.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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CN201710450449.1A CN107469802B (zh) | 2017-06-15 | 2017-06-15 | 一种用于生产富芳烃生物燃油的催化剂及其制备方法 |
CN201710450449.1 | 2017-06-15 |
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WO2018227842A1 true WO2018227842A1 (fr) | 2018-12-20 |
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PCT/CN2017/107943 WO2018227842A1 (fr) | 2017-06-15 | 2017-10-27 | Catalyseur utilisé pour produire un biocarburant riche en aromatiques, et son procédé de préparation |
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CN102239112A (zh) * | 2008-06-18 | 2011-11-09 | 阿肯色大学理事会 | 碳-金属纳米复合物和其应用 |
CN104437361A (zh) * | 2014-10-24 | 2015-03-25 | 东华大学 | 一种原位担载制备功能性生物炭的方法 |
CN106335901A (zh) * | 2016-09-20 | 2017-01-18 | 中国环境科学研究院 | 利用单户庭院含重金属生物质制备的生物炭及制法和应用 |
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