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Method for performing catalytic pyrolysis on tar in biomass gasifier

A catalytic cracking and biomass technology, applied in the field of energy and chemical industry, can solve the problems of increased gas flow resistance, complex gasification furnace design, accelerated catalyst deactivation, etc., to achieve improved efficiency, long contact time, and high dispersion Effect

Inactive Publication Date: 2010-04-07
HEFEI UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

It has been clarified that the catalyst is placed in the gasification furnace or an independent tar catalytic reactor, the tar cracking rate of the above invention is above 75%, the gasification rate is increased by 15%, and the calorific value of gas is increased by 20%, but this kind of gasification The design of the furnace is relatively complicated, and it is also affected by the particle size of the catalyst and the adsorbed filtrate, resulting in an increase in the resistance of the gas flow, and in severe cases, the pipeline will be blocked, and the adsorbate such as sulfide, alkali metal sodium, etc. is easy to cover the active center of the catalyst. Thereby accelerating the deactivation of the catalyst, so the catalyst needs to be replaced frequently, which is inconvenient to use

Method used

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  • Method for performing catalytic pyrolysis on tar in biomass gasifier
  • Method for performing catalytic pyrolysis on tar in biomass gasifier
  • Method for performing catalytic pyrolysis on tar in biomass gasifier

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Experimental program
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Effect test

Embodiment 1

[0025] (1), the attapulgite clay is pre-stocked and homogenized, and then water is added. The weight percentage of water and attapulgite clay is 30-50%: 50-70%. Cutting and extruding into attapulgite clay flakes to promote the depolymerization and dispersion of attapulgite crystal bundles;

[0026] (2), drying the attapulgite-type clay flakes and pulverizing them into attapulgite clay powders passing through a 200-mesh sieve (that is, the particle size is less than 0.075mm);

[0027] (3), the attapulgite clay powder and biomass are uniformly mixed in a weight ratio of 5: 100, and enter the moving bed biomass gasifier through a screw feeder to carry out catalytic cracking tar reaction, and the heat in the gasifier The solution temperature is 900-1000°C. The simulated experimental results of attapulgite clay catalytic pyrolysis of tar are shown in figure 1 .

Embodiment 2

[0029] (1), pulverizing dolomite attapulgite clay into dolomite attapulgite clay powder by 200 mesh sieve (that is, particle diameter is less than 0.075mm);

[0030] (2), uniformly mix dolomite attapulgite clay powder and biomass at a weight ratio of 3:100, enter the moving bed biomass gasifier through a screw feeder for catalytic cracking tar reaction, and The pyrolysis temperature is 900-1000°C. The simulation experiment results of the catalytic cracking of tar with dolomite attapulgite clay are shown in figure 2 .

Embodiment 3

[0032] (1), pulverizing the calcined magnesite into a calcined magnesite powder passing through a 200-mesh sieve (that is, the particle size is less than 0.075 mm);

[0033] (2), calcined magnesite powder and biomass are uniformly mixed in a weight ratio of 3:100, and enter the moving bed biomass gasifier through a screw feeder to carry out catalytic cracking tar reaction, and the heat in the gasifier The solution temperature is 900-1000°C. The simulation experiment results of calcined magnesite catalytic cracking tar are shown in image 3 .

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Abstract

The invention discloses a method for performing catalytic pyrolysis on tar in a biomass gasifier, which comprises the following steps: placing a de-tarring catalyst and a biomass into the biomass gasifier in a weight part ratio of 0.1:100 to 5:100 to perform a tar catalytic pyrolysis reaction; controlling a pyrolysis temperature in the biomass gasifier between 700 and 1,000 DEG C; and contacting a biomass pyrolysis gas obtained after gasification in the biomass gasifier with the de-tarring catalyst at a high temperature so as to carry out the catalytic pyrolysis on the tar. Therefore, the method for performing the catalytic pyrolysis on the tar in the biomass gasifier reduces the content of the tar in a gas produced by the gasifier, increases the yield and lowers the cost, and is simple in operating steps and environmentally-friendly.

Description

technical field [0001] The invention relates to the field of energy and chemical industry, in particular to a method for catalytically cracking tar in a biomass gasification furnace. Background technique [0002] Biomass resources, as a kind of renewable energy, can realize C0 2 Zero emissions can greatly reduce the greenhouse effect and environmental pollution, and it has attracted people's attention. As a result, the development and utilization of biomass energy with high technology has become one of the important ways to replace mineral energy such as petroleum and coal and to solve energy and environmental problems. Judging from the current research progress, biomass pyrolysis gasification technology has the advantages of high efficiency, strong raw material adaptability, simple equipment, and low investment, and is more suitable for the current and future technical and economic levels of rural areas in my country. And it is not restricted by region and climate. Among ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/64B01J21/16
CPCY02P20/52
Inventor 陈天虎刘海波宋磊陈冬李金虎张先龙
Owner HEFEI UNIV OF TECH
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