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Preparation method for tar-removing catalyst of nickel-based nanometer compound carrier

A nano-composite and catalyst technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of secondary pollution, high energy consumption, conversion of tar, etc.

Active Publication Date: 2017-05-10
广东国能中林实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the physical filtration method, water washing method, and electric coke capture method cannot fundamentally convert tar, which is likely to cause secondary pollution. The thermal cracking method has the disadvantage of high energy consumption, and there are problems in its promotion.

Method used

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  • Preparation method for tar-removing catalyst of nickel-based nanometer compound carrier
  • Preparation method for tar-removing catalyst of nickel-based nanometer compound carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] The preparation method of the present embodiment comprises the following steps:

[0085] Step 1: Mix 20ml of tetrabutyl titanate with 60ml of absolute ethanol and stir evenly to obtain a tetrabutyl titanate ethanol mixed solution. Mix 20ml of deionized water and 20ml of absolute ethanol, add a small amount of nitric acid, adjust PH = 3, and obtain a mixed aqueous solution of ethanol and nitric acid; at room temperature, use a peristaltic pump 1ml / min to slowly add tetrabutyl titanate ethanol dropwise to the mixed aqueous solution of ethanol and nitric acid The solution was vigorously stirred at 1500 rpm to hydrolyze the tetrabutyl titanate, and the stirring was continued for 3 hours to obtain a sol.

[0086] Step 2: drying the obtained sol at 85°C for 24 hours to form a gel, and placing the gel in a muffle furnace for calcination at 550°C for 4 hours to obtain nano-TiO2 powder.

[0087]Step 3: Mix 20g of commercial molecular sieve HZSM-5 with Si / Al=38 and 2000ml of NaO...

Embodiment 2

[0092] The preparation method of the present embodiment comprises the following steps:

[0093] Step 1: Mix 20ml of tetrabutyl titanate with 60ml of absolute ethanol and stir evenly to obtain a tetrabutyl titanate ethanol mixed solution. Mix 20ml of deionized water and 20ml of absolute ethanol, add a small amount of nitric acid, adjust PH = 3, and obtain a mixed aqueous solution of ethanol and nitric acid; at room temperature, use a peristaltic pump 1ml / min to slowly add tetrabutyl titanate ethanol dropwise to the mixed aqueous solution of ethanol and nitric acid The solution was vigorously stirred at 1500 rpm to hydrolyze the tetrabutyl titanate, and the stirring was continued for 3 hours to obtain a sol.

[0094] Step 2: drying the obtained sol at 85°C for 24 hours to form a gel, and placing the gel in a muffle furnace for calcination at 550°C for 4 hours to obtain nano-TiO2 powder.

[0095] Step 3: Mix 20g of commercial molecular sieve HZSM-5 with Si / Al=38 and 2000ml of Na...

Embodiment 3

[0100] The preparation method of the present embodiment comprises the following steps:

[0101] Step 1: Mix 20ml of tetrabutyl titanate with 60ml of absolute ethanol and stir evenly to obtain a tetrabutyl titanate ethanol mixed solution. Mix 20ml of deionized water and 20ml of absolute ethanol, add a small amount of nitric acid, adjust PH = 3, and obtain a mixed aqueous solution of ethanol and nitric acid; at room temperature, use a peristaltic pump 1ml / min to slowly add tetrabutyl titanate ethanol dropwise to the mixed aqueous solution of ethanol and nitric acid The solution was vigorously stirred at 1500 rpm to hydrolyze the tetrabutyl titanate, and the stirring was continued for 3 hours to obtain a sol.

[0102] Step 2: drying the obtained sol at 85°C for 24 hours to form a gel, and placing the gel in a muffle furnace for calcination at 550°C for 4 hours to obtain nano-TiO2 powder.

[0103] Step 3: Mix 20g of commercial molecular sieve HZSM-5 with Si / Al=38 and 2000ml of Na...

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Abstract

The invention discloses a preparation method for a tar-removing catalyst of a nickel-based nanometer compound carrier. The preparation method for a catalyst containing no auxiliary comprises the following steps: 1) acquiring a tetrabutyl titanate and ethyl alcohol mixed solution and preparing an ethyl alcohol and nitric acid mixed aqueous solution; 2) preparing nanometer TiO2 powder; 3) preparing a modified molecular sieve; 4) preparing a gamma-Al2O3-TiO2 / HZSM-5 catalyst carrier; and 5) adopting a saturated impregnation method for steeping gamma-Al2O3-TiO2 / HZSM-5 carrier with a nickel nitrate solution, drying and staying overnight, drying 6h at 105 DEG C, putting into a calcining furnace and calcining for 3-8h at 400-600 DEG C, thereby acquiring a NiO / gamma-Al2O3-TiO2 / HZSM-5 catalyst. The preparation method has the effects of promoting the reactivity and anti-carbon capacity of the catalyst and prolonging the service life of the catalyst.

Description

technical field [0001] The invention relates to the technical field of biomass gasification gas purification, in particular to a preparation method of a nickel-based nanocomposite carrier tar removal catalyst. Background technique [0002] Biomass gasification is one of the important ways to utilize biomass. It converts biomass into CO, H2, CH4 and other gaseous fuels through thermochemical methods. Gas fuel deep processing. As an inevitable by-product in the gasification process, tar has problems such as corroding equipment, blocking pipelines, reducing the calorific value of gas, and polluting the environment. The tar needs to be removed before the gas is used. The current tar removal technologies include thermal cracking, catalytic cracking, physical filtration, water washing, and electric coke capture. Among them, the physical filtration method, water washing method, and electric coke capture method cannot fundamentally convert tar, which is likely to cause secondary p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/46C10K1/34
CPCB01J29/46C10K1/34
Inventor 林进猛蒋彪王源艺姜辉胡洪
Owner 广东国能中林实业有限公司
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