Nickel-based tar reforming catalyst based on mesoporous zirconia carrier and preparation method thereof

A mesoporous zirconia and tar conversion technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of low catalyst activity and inappropriate pore structure. , easy carbon deposition and other problems, to achieve the effect of superior catalytic activity, good tar catalytic conversion performance, and prevention of deactivation of carbon deposition

Inactive Publication Date: 2012-03-21
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing catalyst supports generally have the problems of small specific surface area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1

[0021] (1) Preparation of mesoporous zirconium-based molecular sieve carrier: Measure 4.55 g of zirconium sulfate (ZrSO 4 ·4H 2 O) and 1.5g of CTAB (hexadecyltrimethylammonium bromide) were dissolved in 60mL of deionized water, and stirred for 2h, then transferred to a stainless steel reactor lined with PTFE, and aged at 100℃ After 2 days, the white precipitate was obtained by filtration, dried in a common blast drying oven at 105°C for 5 hours, and then the dried powder was refluxed in a 0.5mol / L phosphoric acid solution for 8 hours; after filtration, the filter residue was placed in a common blast Drying in a drying oven at 105°C for 12h, and then roasting in a muffle furnace at 500°C (programmed temperature rise rate is 2°C / min, holding time is 3h) to obtain 1.6g of mesoporous ZrO 2 Carrier

[0022] (2) Load of active component NiO: According to the equal volume impregnation method, measure 0.07g of nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O) Dissolve in 8g deionized...

Example Embodiment

[0024] Example 2

[0025] (1) Preparation of mesoporous zirconium-based molecular sieve carrier: 1.6 g of mesoporous ZrO was prepared according to the method of step (1) in Example 1. 2 Carrier

[0026] (2) Load of active component NiO: According to the equal volume impregnation method, measure 0.21g of nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O) Dissolve in 8g deionized water, add 1.6g mesoporous ZrO 2 The carrier was added to the above nickel nitrate solution, ultrasonically treated for 2 hours and left for 3 hours; then the above materials were placed in a common blast drying oven at 100°C for 4 hours, and in a muffle furnace at 550°C for 3 hours (programmed heating rate is 3°C / min , The holding time is 3h), the mesoporous NiO / ZrO is obtained 2 Composite catalyst, in which the content of NiO is 3.3%.

[0027] The performance of the above-mentioned catalyst was evaluated in the biomass pyrolysis gasification unit. When the catalytic reaction temperature is 500-1000℃, the tar conversion ef...

Example Embodiment

[0028] Example 3

[0029] (1) Preparation of mesoporous zirconium-based molecular sieve carrier: Measure 4.55 g of zirconium sulfate (ZrSO 4 ·4H 2 O) and 1.5 g of CTAB (hexadecyl trimethyl ammonium bromide) were dissolved in 60 mL of deionized water and stirred for 3 hours, then transferred to a stainless steel reactor lined with polytetrafluoroethylene and aged at 90°C After 2 days, the white precipitate was obtained by filtration, and it was dried in an ordinary blast drying oven at 110°C for 3 hours, and then the dried powder was refluxed in a 1.0 mol / L phosphoric acid solution for 6 hours; after filtration, the residue was placed in ordinary blast Drying in a drying oven at 105°C for 12h, and then roasting in a muffle furnace at 500°C (programmed temperature rise rate is 2°C / min, holding time is 3h) to obtain 1.6g of mesoporous ZrO 2 Carrier

[0030] (2) Load of active component NiO: According to the equal volume impregnation method, measure 0.45g of nickel acetate (Ni(CH 3 COO...

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Abstract

The invention belongs to the field of utilization of catalyst and biomass energy and particularly relates to a nickel-based tar reforming catalyst based on a mesoporous zirconia carrier and a preparation method thereof. The nickel-based tar reforming catalyst based on a mesoporous zirconia carrier utilizes mesoporous zirconia molecular sieves as carriers and utilizes nickel oxide as an active component, and is a composite catalyst which comprises 70%-99.5% by mass of mesoporous zirconia molecular sieves and 0.5%-30% by mass of nickel oxide. Since the mesoporous zirconia molecular sieves are used as the carriers, the specific surface area of the catalyst is expanded greatly, and an order channel structure suitable for cracking reaction of macromolecular organic matter in tar is provided. By means of interaction between the mesoporous zirconia molecular sieves and the nickel oxide, reactivity of the catalyst is improved, and the catalytic reforming rate to tar can be over 99%.

Description

technical field [0001] The invention belongs to the field of catalyst and biomass energy utilization, and in particular relates to a novel nickel-based tar conversion catalyst based on a mesoporous zirconia carrier and a preparation method. Background technique [0002] Biomass tar is a by-product produced during pyrolysis and gasification. The existence of tar has great harm to the pyrolysis gasification process and related equipment. First of all, the utilization efficiency is reduced. The energy of tar generally accounts for 5-15% of the total energy. This part of energy is difficult to be utilized and is wasted; secondly, tar is condensed during the gas transmission process to form a viscous liquid, which adheres to the pipeline and The wall surface of the equipment will cause the blockage of the pipeline; moreover, the tar is easy to produce carbon black when it is burned, causing pollution and serious damage to the gas utilization equipment. [0003] The removal meth...

Claims

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Application Information

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IPC IPC(8): B01J23/755B01J35/10C10G11/04
Inventor 董长青陶君陆强杨勇平胡笑颖
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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