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Method for preparing integral biomass gasified tarcracking catalyst

A technology of tar cracking and biomass, which is applied in the field of preparation of integral biomass gasification tar cracking catalysts, can solve problems such as environmental hazards, gasification efficiency reduction, waste, etc., and achieve high catalytic activity, small amplification effect, and reaction space. big effect

Active Publication Date: 2007-03-28
茂名市泓宇能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In terms of gasification, tar reduces gasification efficiency, because the energy of tar products in gasification generally accounts for 5-15% of the total energy, and this part of energy is difficult to be utilized together with combustible gas at low temperature, and most of it is wasted; in addition , tar condenses into a liquid state at low temperature, and it is easy to combine with water, coke, etc. to block the gas supply pipeline and make the operation of the gasification equipment difficult.
In terms of environment, since the water washing method is currently the main way to treat tar oil, it will inevitably produce secondary pollution and cause serious harm to the environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Step (1): Take a piece of cordierite (outer diameter 40mm, height 50mm) and place it in 100ml of 35% oxalic acid solution for 20min. After taking it out, dry it at 100°C for 8h, and then bake it at 300°C for 5h.

[0016] Step (2): 10g γ-Al 2 o 3 , 90ml ethanol, and 50ml water to form a mixed solution, and grind the mixed solution in a mortar until there is no γ-Al 2 o 3 Flocs appear. Immerse the cordierite treated in step (1) in the mixed solution, and vacuum it for 50 minutes, then take it out and blow off the residual solution. The cordierite with the residual liquid blown out was aged in air for 24 hours, then dried at 60°C for 6 hours, and then transferred to a muffle furnace at 500°C for 6 hours of calcination.

[0017] Repeat step (2) 2-3 times until the coating rate of γ-Al2O3 reaches 8-15%.

[0018] Step (3): prepare 1mol / l Ni(NO 3 ) 2 , with its vacuum impregnation coated with Al 2 o 3 The cordierite carrier was aged in the air for 40-60min for 12h and...

Embodiment 2

[0021] Step (1): Take a piece of cordierite (outer diameter 40mm, height 50mm) and place it in 120ml of 30% oxalic acid solution for 30min. After taking it out, dry it at 100°C for 8h, and then bake it at 300°C for 5h.

[0022] Step (2): 10g γ-Al 2 o 3 , 100ml of ethanol and 60ml of water are mixed to form a mixed solution, and the mixed solution is ground in a mortar until there is no γ-Al 2 o 3 Flocs appear. Immerse the cordierite treated in step 1 in the mixed liquid, and vacuum it for 40 minutes, then take it out and blow off the residual liquid. The cordierite with the residual liquid blown out was aged in air for 24 hours, then dried at 60°C for 6 hours, and then transferred to a muffle furnace at 500°C for 6 hours of calcination.

[0023] Repeat step (2) 2-3 times until the coating rate of γ-Al2O3 reaches 8-15%.

[0024] Step 3: Prepare 1mol / l Ni(NO 3 ) 2 , with its vacuum impregnation coated with Al 2 o 3 The cordierite carrier was aged for 50 minutes in the a...

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Abstract

The present invention provides a preparation method of integral type biomass tar cracking catalyst with high reaction intensity, high tar cracking rate and good selectivity. Said method includes the following steps: (1), using oxalic acid to treat carrier: placing the cordierite in the constant-boiling oxalic acid solution whose concentration is 30-40%, treating for 20-30 min, drying and calcining; (2),coating liquor coating: making nano-grade gamma-Al2O3 be mixed with ethyl alcohol and water, grinding them, placing the above-mentioned cordierite into the above-mentioned solution, soaking said cordierite, at the same time vacuum pumping for 40-60 min, taking out residue, ageing, drying, calcining and repeatedly coating to make the coating rate be reached to 8-15%; (3), soaking by using active component solution: preparing Ni(NO3)2 solution, soaking the above-mentioned cordierite in the above-mentioned solution, ageing, drying, calcining and repeatedly coating to make its coating rate be up to above 5%.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a preparation method of an integral biomass gasification tar cracking catalyst. technical background [0002] Biomass thermochemical gasification is an advanced biomass energy conversion method, and its goal is to obtain as many combustible gas products as possible. According to the different gasification agents used, biomass gasification can be divided into air gasification, water vapor gasification, oxygen-enriched gasification, etc.; according to the different reactors used, it can be divided into down-suction furnace gasification and up-suction furnace Gasification and fluidized bed gasification, etc. No matter in any gasification process, coke and tar are unavoidable by-products. Among them, tar is gaseous at high temperature and completely mixed with combustible gas, but condenses into liquid at low temperature (generally lower than 200°C), so its separation and...

Claims

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Application Information

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IPC IPC(8): B01J37/025B01J23/835B01J21/16
Inventor 吕鹏梅袁振宏王忠铭马隆龙吴创之李海滨
Owner 茂名市泓宇能源科技有限公司
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