CN109225230A - It is a kind of to prepare high-performance Ni/Al2O3The method of aerogel catalyst - Google Patents

It is a kind of to prepare high-performance Ni/Al2O3The method of aerogel catalyst Download PDF

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Publication number
CN109225230A
CN109225230A CN201811219658.6A CN201811219658A CN109225230A CN 109225230 A CN109225230 A CN 109225230A CN 201811219658 A CN201811219658 A CN 201811219658A CN 109225230 A CN109225230 A CN 109225230A
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China
Prior art keywords
catalyst
performance
aerogel catalyst
aeroge
aerogel
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CN201811219658.6A
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Chinese (zh)
Inventor
毛林强
吴韵秋
周欢
张文艺
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Changzhou University
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Changzhou University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/74Iron group metals
    • B01J23/755Nickel
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/60Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/08Heat treatment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/16Reducing
    • B01J37/18Reducing with gases containing free hydrogen

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Catalysts (AREA)

Abstract

High-performance Ni/Al is prepared the invention discloses a kind of2O3The method of aerogel catalyst.It comprises the concrete steps that using improved sol-gal process and prepares wet gel, restore to obtain aerogel catalyst further across drying and roasting.With it is traditional prepare the method for catalyst compared with, this method economical and efficient and reproducible is suitable for large-scale industrial production.The aerogel catalyst of preparation compared to traditional catalyst there is large specific surface area, the load capacity of metal, utilization rate and catalysis performance to have many advantages, such as being substantially improved.The aerogel catalyst of this method preparation has important practical value and good application prospect.

Description

It is a kind of to prepare high-performance Ni/Al2O3The method of aerogel catalyst
Technical field
The present invention relates to aerogel catalyst preparation field, specifically a kind of economical and efficient prepares large specific surface area, hole The method for the aerogel catalyst that rate is high and catalytic performance is good.
Background technique
Hydrogen is ideal clean energy resource.Catalytic decomposition methane hydrogen manufacturing is simple with process, low energy consumption, separating step Less and no coupling product COXThe advantages that generation and cause people and greatly pay close attention to.Catalyst is the key that the reaction.Applied to work Catalyst in industry production should have the features such as large specific surface area, activity is high, and stability is good.But using conventional method preparation That there are specific surface areas in terms of methane hydrogen manufacturing is catalytically decomposed is small for catalyst, and actual metal load capacity is small, stability is poor, high temperature is easily burnt The serious problems such as knot, carbon distribution inactivation.Various countries researcher is in the performance for making great efforts raising traditional catalyst all the time.Aeroge (Aerogels) it is many unique to have the advantages that large specific surface area, thermal stability are good, hole is flourishing etc., fireclay insulating refractory, Catalyst carrier, gas and cleanser of water etc. have broad application prospects.Chinese patent CN102443154B is related to One kind contains TiO2And ZrO2Aerogel particle, the aerogel particle diameter be 10-200nm, density 30-600mg/ cm3, have important application value in terms of as catalyst carrier and absorption.Publication number CN103285920B discloses one kind three Fiber base aerogel catalyst carrier and preparation method thereof is tieed up, the present invention is simple, raw material limitation is few, aeroge catalysis Agent carrier product has good flexibility, connectivity and catalyst load capacity, has in catalytic applications and potentially answers With value.Aerogel catalyst prepared by these publications respectively has advantage and disadvantage and optimal using field, but for some Catalysis is reacted but and is not suitable for, such as catalytic methane decomposing hydrogen-production and the reaction for synthesizing ammonia, because of both aerogel catalysts Catalysis performance and stability it is poor.It also needs to develop requirement of a variety of aerogel catalysts to adapt to different catalysis reactions thus.
Summary of the invention
In view of the above shortcomings of the prior art, the object of the present invention is to provide a kind of economical and efficient preparation large specific surface area, The Ni/Al that porosity height and catalytic performance are excellent in2O3The preparation method of aerogel catalyst, to achieve the above object, this hair It is bright to use following technical scheme:
It is a kind of to prepare high-performance Ni/Al2O3The method of aerogel catalyst, includes the following steps:
Step 1: preparing the mixed liquor of aluminium chloride and nickel chloride;
Step 2: propylene oxide is added into the mixed liquor that above-mentioned steps prepare, by the mixing after addition propylene oxide Liquid heated sealed, then cools to room temperature to be put into stand in baking oven and obtains wet gel;
Step 3: obtaining aeroge after the wet gel that above-mentioned steps are prepared is dried, and obtained aeroge is existed Muffle kiln roasting;
Step 4: the aeroge of above-mentioned steps preparation is first purged under inert gas atmosphere, hydrogen reducing is then used again Obtain aerogel catalyst;
In step 1, the mass percentage concentration for preparing aluminium chloride and nickel chloride in aluminium chloride and nickel chloride mixed liquor Range is respectively as follows: 1wt%-90wt%, 1wt%-90wt%.
In step 2, the volume of propylene oxide is added into the mixed liquor that above-mentioned steps prepare are as follows: 1mL-90mL.
In step 3, the temperature of aeroge that above-mentioned steps are prepared in Muffle kiln roasting are as follows: 50 DEG C -2500 ℃.In step 4, aeroge prepared by above-mentioned steps is purged under inert gas atmosphere, then uses the temperature of hydrogen reducing again Are as follows: 50 ° -2500 DEG C, time 0-60h.
The beneficial effects of the present invention are:
Method of the invention is to be prepared for height using sol-gel method in the preparation method by improving traditional catalyst Performance Ni/Al2O3Aerogel catalyst.This method has the advantages that simple step, economical and efficient, reaction condition are mild;Preparation Ni/Al2O3Aerogel catalyst has the characteristics that large specific surface area, porosity are high and catalytic performance is good.Therefore, the present invention provides Aerogel catalyst have important practical value and good application prospect.
Detailed description of the invention
Fig. 1 is that the invention prepares Ni/Al2O3The process flow chart of aerogel catalyst;
Fig. 2 is the Ni/Al of the embodiment of the present invention preparation2O3The catalysis expression effect figure of aerogel catalyst.
Specific embodiment
Below with reference to example, the invention will be further described, and following embodiment is intended to illustrate invention rather than to this Invention further limits.
Embodiment 1
Weigh 4.74g AlCl3·6H2O and 4.95g Ni (NO3)2·6H2O is put into beaker, be added 10mL distilled water and 15.5mL dehydrated alcohol, stirring 35min are mixed them thoroughly uniformly, and beaker is then enclosed in 80 DEG C of water-bath with three layers of preservative film 15.5mL propylene oxide (PO) is added after being cooled to room temperature in lower heating 1h, then by mixed liquor rest in 50 DEG C of baking ovens 2 days to Its gel, is further dried to obtain aeroge for wet gel.By gained aeroge first in Muffle kiln roasting 8h, temperature 550 DEG C, 35min is then purged in nitrogen atmosphere at 120 DEG C, finally obtains Ni/Al after hydrogen reducing 2.5h at 450 DEG C2O3Gas Gel catalyst.
Embodiment 2
Weigh 4.74g AlCl3·6H2O and 3.89g Ni (NO3)2·6H2O is put into beaker, be added 10mL distilled water and 15.5mL dehydrated alcohol, stirring 35min are mixed them thoroughly uniformly, and beaker is then sealed 80 DEG C of rear water-bath with three layers of preservative film 15.5mL propylene oxide (PO) is added after being cooled to room temperature in lower heating 1h, then by mixed liquor rest in 50 DEG C of baking ovens 2 days to Its gel, is further dried to obtain aeroge for wet gel.By gained aeroge first in Muffle kiln roasting 8h, temperature 550 DEG C, 35min is then purged in nitrogen atmosphere at 120 DEG C, finally obtains Ni/Al after hydrogen reducing 2.5h at 450 DEG C2O3Gas Gel catalyst.
Embodiment 3
Weigh 4.74g AlCl3·6H2O and 4.95g Ni (NO3)2·6H2O is put into beaker, be added 10mL distilled water and 15.5mL dehydrated alcohol, stirring 35min are mixed them thoroughly uniformly, and beaker is then sealed 80 DEG C of rear water-bath with three layers of preservative film 20mL propylene oxide (PO) is added after being cooled to room temperature in lower heating 1h, and mixed liquor is then rested in 50 DEG C of baking ovens 2 days to it Wet gel is further dried to obtain aeroge by gel.By gained aeroge first in Muffle kiln roasting 8h, temperature is 450 DEG C, Then 35min is purged in nitrogen atmosphere at 120 DEG C, finally obtains Ni/Al after hydrogen reducing 2.5h at 450 DEG C2O3Aeroge Catalyst.
Embodiment 4
Weigh 4.74g AlCl3·6H2O and 4.95g Ni (NO3)2·6H2O is put into beaker, be added 10mL distilled water and 15.5mL dehydrated alcohol, stirring 35min are mixed them thoroughly uniformly, and beaker is then sealed 80 DEG C of rear water-bath with three layers of preservative film 15.5mL propylene oxide (PO) is added after being cooled to room temperature in lower heating 1h, then by mixed liquor rest in 50 DEG C of baking ovens 2 days to Its gel, is further dried to obtain aeroge for wet gel.By gained aeroge first in Muffle kiln roasting 8h, temperature 550 DEG C, 35min is then purged in nitrogen atmosphere at 120 DEG C, finally obtains Ni/Al after hydrogen reducing 2h at 450 DEG C2O3Airsetting Glue catalyst.
Embodiment 5
Weigh 4.74g AlCl3·6H2O and 4.95g Ni (NO3)2·6H2O is put into beaker, be added 10mL distilled water and 15.5mL dehydrated alcohol, stirring 35min are mixed them thoroughly uniformly, and beaker is then sealed 80 DEG C of rear water-bath with three layers of preservative film 35mL propylene oxide (PO) is added after being cooled to room temperature in lower heating 1h, and mixed liquor is then rested in 50 DEG C of baking ovens 2 days to it Wet gel is further dried to obtain aeroge by gel.By gained aeroge first in Muffle kiln roasting 8h, temperature is 550 DEG C, Then 35min is purged in nitrogen atmosphere at 120 DEG C, finally obtains Ni/Al after hydrogen reducing 2h at 430 DEG C2O3Aeroge is urged Agent.
Embodiment 6
Weigh 3.76g AlCl3·6H2O and 4.95g Ni (NO3)2·6H2O is put into beaker, be added 10mL distilled water and 15.5mL dehydrated alcohol, stirring 35min are mixed them thoroughly uniformly, and beaker is then sealed 80 DEG C of rear water-bath with three layers of preservative film 15.5mL propylene oxide (PO) is added after being cooled to room temperature in lower heating 1h, then by mixed liquor rest in 50 DEG C of baking ovens 2 days to Its gel, is further dried to obtain aeroge for wet gel.By gained aeroge first in Muffle kiln roasting 8h, temperature 550 DEG C, 35min is then purged in nitrogen atmosphere at 120 DEG C, finally obtains Ni/Al after hydrogen reducing 2h at 450 DEG C2O3Airsetting Glue catalyst.
In above-described embodiment, Ni/Al2O3Aerogel catalyst is made using existing method.
Fig. 2 is the Ni/Al that above-described embodiment is prepared2O3Aerogel catalyst and traditional catalyst (Ni/Al2O3、Ni- Fe/Al2O3、Fe/Al2O3、Ni/SiO2、Ni-Co/SiO2Deng) catalytic decomposition methane activity comparison diagram.All test conditions are all protected It holds consistent.It can be seen that using the Ni/Al of the method preparation2O3The catalytic performance of aerogel catalyst is significantly better than conventional catalyst Agent.This illustrates that aerogel catalyst has many advantages, such as that large specific surface area, porosity are high and catalytic performance is good.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered It is considered as protection scope of the present invention.

Claims (5)

1. a kind of prepare high-performance Ni/Al2O3The method of aerogel catalyst, characterized by the following steps:
Step 1: preparing the mixed liquor of aluminium chloride and nickel chloride;
Step 2: propylene oxide is added into the mixed liquor that above-mentioned steps prepare, the mixed liquor after addition propylene oxide is close Envelope heating, then cools to room temperature to be put into stand in baking oven and obtains wet gel;
Step 3: obtaining aeroge after the wet gel that above-mentioned steps are prepared is dried, and by obtained aeroge in Muffle Kiln roasting;
Step 4: the aeroge of above-mentioned steps preparation is first purged under inert gas atmosphere, then obtained again with hydrogen reducing Aerogel catalyst.
2. preparation high-performance Ni/Al according to claim 12O3The method of aerogel catalyst, it is characterised in that: step In one, the mass percentage concentration range of aluminium chloride and nickel chloride in aluminium chloride and nickel chloride mixed liquor for preparing is respectively as follows: 1wt%-90wt%, 1wt%-90wt%.
3. preparation high-performance Ni/Al according to claim 12O3The method of aerogel catalyst, it is characterised in that: step In two, the volume of propylene oxide is added into the mixed liquor that above-mentioned steps prepare are as follows: 1mL-90mL.
4. preparation high-performance Ni/Al according to claim 12O3The method of aerogel catalyst, it is characterised in that: step In three, the temperature of aeroge that above-mentioned steps are prepared in Muffle kiln roasting are as follows: 50 DEG C -2500 DEG C.
5. preparation high-performance Ni/Al according to claim 12O3The method of aerogel catalyst, it is characterised in that: step In four, aeroge prepared by above-mentioned steps is purged under inert gas atmosphere, then uses the temperature of hydrogen reducing again are as follows: 50 °- 2500 DEG C, time 0-60h.
CN201811219658.6A 2018-10-19 2018-10-19 It is a kind of to prepare high-performance Ni/Al2O3The method of aerogel catalyst Pending CN109225230A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113198547A (en) * 2021-05-27 2021-08-03 淮阴工学院 Preparation method of block metal catalyst using attapulgite-alumina aerogel as carrier
CN115212887A (en) * 2022-07-05 2022-10-21 南京大学 Preparation method of reforming catalyst with high dispersion degree of active metal components

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102145994A (en) * 2010-02-09 2011-08-10 航天材料及工艺研究所 Block alumina aerogel with high temperature resistance and high specific surface area and preparation method thereof
CN105170156A (en) * 2015-09-10 2015-12-23 上海大学 Preparation method of nickel-base methane dry-reforming catalyst of aerogel-like structure
US20160129421A1 (en) * 2014-11-12 2016-05-12 Myongji University Industry And Academia Cooperation Foundation Aerogel for capturing carbon dioxide
CN106430265A (en) * 2016-08-31 2017-02-22 贵州师范大学 Method for preparing alumina aerogel through extracting aluminum from bauxite
CN107159217A (en) * 2017-04-25 2017-09-15 江苏大学 A kind of Cu ZnO/SiO2Aeroge bimetallic catalyst and its production and use

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102145994A (en) * 2010-02-09 2011-08-10 航天材料及工艺研究所 Block alumina aerogel with high temperature resistance and high specific surface area and preparation method thereof
US20160129421A1 (en) * 2014-11-12 2016-05-12 Myongji University Industry And Academia Cooperation Foundation Aerogel for capturing carbon dioxide
CN105170156A (en) * 2015-09-10 2015-12-23 上海大学 Preparation method of nickel-base methane dry-reforming catalyst of aerogel-like structure
CN106430265A (en) * 2016-08-31 2017-02-22 贵州师范大学 Method for preparing alumina aerogel through extracting aluminum from bauxite
CN107159217A (en) * 2017-04-25 2017-09-15 江苏大学 A kind of Cu ZnO/SiO2Aeroge bimetallic catalyst and its production and use

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113198547A (en) * 2021-05-27 2021-08-03 淮阴工学院 Preparation method of block metal catalyst using attapulgite-alumina aerogel as carrier
CN115212887A (en) * 2022-07-05 2022-10-21 南京大学 Preparation method of reforming catalyst with high dispersion degree of active metal components
CN115212887B (en) * 2022-07-05 2023-06-06 南京大学 Preparation method of reforming catalyst with high dispersity of active metal component

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Application publication date: 20190118