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Preparation method of biomass gasification tar catalytic cracking supported molecular sieve catalyst

A catalytic cracking and catalyst technology, applied in molecular sieve catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of unsatisfactory catalytic cracking tar effect, etc. The effect of reaction temperature

Active Publication Date: 2017-04-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effect of a single catalyst for catalytic cracking of tar is not ideal, so it is necessary to prepare a composite supported catalyst with active components and additives stacked to give full play to the role of each active substance

Method used

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  • Preparation method of biomass gasification tar catalytic cracking supported molecular sieve catalyst
  • Preparation method of biomass gasification tar catalytic cracking supported molecular sieve catalyst
  • Preparation method of biomass gasification tar catalytic cracking supported molecular sieve catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Pulverize strip-shaped HZSM-5 of Si / Al=25, and sieve out 40~80 mesh particles;

[0024] (2) Put it into a constant temperature drying oven and heat it at 100°C for 5 hours to open the tunnel for later use;

[0025] (3) measure the saturated water absorption of this catalyst with distilled water, record the saturated water absorption of Si / Al=25 0.884mL / g;

[0026] (4) The active components were impregnated by a stepwise equal volume impregnation method, with the aim of preparing catalysts with Ni and MgO loadings of 6% and 2%, respectively. Mg(NO 3 ) 2 ·6H 2 O is dissolved in quantitative distilled water, and Mg(NO 3 ) 2 solution, slowly pour the weighed step (3) catalyst into it, and this process must not be stirred. Then let it stand at room temperature for 12 hours, then put it into a constant temperature drying oven to evaporate to dryness at 80°C, and overnight at 110°C; finally put it into a muffle furnace, bake it at 550°C for 4 hours, and take it out f...

Embodiment 2

[0029] (1) Pulverize strip-shaped HZSM-5 of Si / Al=50, and sieve out 40~80 mesh particles;

[0030] (2) Put it into a constant temperature drying oven and heat it at 100°C for 5 hours to open the tunnel for later use;

[0031] (3) Measure the saturated water absorption of the catalyst with distilled water, and record the saturated water absorption of Si / Al=50 as 0.887mL / g;

[0032] (4) The active components were impregnated by a stepwise equal volume impregnation method, with the aim of preparing catalysts with Ni and MgO loadings of 6% and 2%, respectively. Mg(NO 3 ) 2 ·6H 2 O is dissolved in quantitative distilled water, and Mg(NO 3 ) 2 Solution, slowly pour the weighed catalyst into it, and the process should not be stirred. Then let it stand at room temperature for 12 hours, then put it into a constant temperature drying oven to evaporate to dryness at 80°C, and overnight at 110°C; finally put it into a muffle furnace, bake it at 550°C for 4 hours, and take it out for...

Embodiment 3

[0035] (1) Pulverize strip-shaped HZSM-5 of Si / Al=80, and sieve out 40~80 mesh particles;

[0036] (2) Put it into a constant temperature drying oven and heat it at 100°C for 5 hours to open the tunnel for later use;

[0037] (3) The saturated water absorption of the catalyst was measured with distilled water, and the saturated water absorption of Si / Al=80 was measured to be 0.879mL / g.

[0038] (4) The active components were impregnated by a stepwise equal volume impregnation method, with the aim of preparing catalysts with Ni and MgO loadings of 6% and 2%, respectively. Mg(NO 3 ) 2 ·6H 2 O is dissolved in quantitative distilled water, and Mg(NO 3 ) 2Solution, slowly pour the weighed catalyst into it, and the process should not be stirred. Then let it stand at room temperature for 12 hours, then put it into a constant temperature drying oven to evaporate to dryness at 80°C, and overnight at 110°C; finally put it into a muffle furnace, bake it at 550°C for 4 hours, and ta...

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Abstract

The invention discloses a method for preparing a metal loaded molecular sieve catalyst by using catalytic cracking of biomass gasification tar. The method comprises the following steps: crushing strip-shaped HZSM-5 of different Si / Al ratios, screening the particles with the granularity of 2.67-5.33mm, heating and drying the particles at the temperature of 100 DEG C, and detecting the saturated water absorptivity; preparing 0.55-0.60mol / L of Mg(NO3)2 solution, pouring the catalyst into the solution without stirring, standing at room temperature for 12 hours, evaporating to dryness at the temperature of 80 DEG C, staying the night at the temperature of 110 DEG C, and roasting at the temperature of 550 DEG C; preparing Ni(NO3)2 solution with the concentration of 1.15-1.20mol / L; pouring a catalyst loaded with MgO into the solution, repeating the operations, and finally roasting the catalyst loaded with MgO and NiO at the temperature of 800 DEG C for 10 hours, and performing in-situ reduction on the catalyst before the reaction, thereby obtaining the Ni-MgO / HZSM-5 metal loaded molecular sieve catalyst. According to the method disclosed by the invention, the heat value of gas products is improved, the reaction temperature is reduced, the energy consumption is low, and carbon deposition of the catalyst is reduced.

Description

technical field [0001] The present invention relates to catalysts, in particular to a metal-loaded molecular sieve catalyst for catalytic cracking of biomass gasification tar into high calorific value combustible gas Background technique [0002] As the material basis of human social life and development and progress, energy has always been concerned and valued. In the last century, human energy supply mainly relied on limited fossil energy, such as crude oil, coal, and natural gas. According to the statistics and predictions of the International Energy Agency, coal on the earth can be exploited by human society for about 220 years, while crude oil and natural gas can only be exploited by human beings for 40 to 50 years. Therefore, the exploitation and use of traditional energy has been difficult to meet the development needs of the follow-up society, and the energy issue will become a complex, multi-dimensional, and inter-coupled severe challenge for mankind in the future....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/46C10J3/64
CPCY02P20/52
Inventor 陈冠益刘聪马文超颜蓓蓓李健
Owner TIANJIN UNIV