Biomass tar cracking catalyst

A technology of tar cracking and biomass pyrolysis, which is applied in the field of biomass renewable energy utilization, can solve the problems of cumbersome preparation methods, and achieve the effects of simple preparation process, prevention of sintering, and guaranteed stability

Inactive Publication Date: 2012-02-01
HUAZHONG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the cumbersome problem of the existing tar cracking catalyst preparation method, to provide a kind of tar cracking catalyst which is simple to make, high in cracking activity and low in use temperature

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1: Take by weighing 100.45g charcoal after dry distillation pyrolysis by wood block, after crushing, mix with 28.23g metal cobalt oxide Co 2 o 3 After mixing evenly, process it into a 2-3mm spherical shape, and put it in a fixed bed in a catalytic evaluation device as a catalyst for catalytic cracking of tar. The catalytic evaluation device is produced by Tianjin Xianquan Industry and Trade Development Co., Ltd., model WFS-3015 , the inner diameter of the fixed bed is 15mm, the length is 270mm, and the loading amount of the catalyst is 50g. At the beginning of the experiment, nitrogen is used as the carrier gas, and the flow rate is 50ml / min. In the vaporizer of the evaluation device, after being gasified, it enters the fixed catalytic bed together with the carrier gas to undergo a catalytic cracking reaction. The gas generated after the reaction is cooled and then emptied. If there is uncracked tar, it will be condensed and collected. The quality of tar and...

Embodiment 2

[0029] Example 2: Weigh 148.60g of biomass pyrolytic carbon, crush it to 0.5-0.8mm, mix it with 27.88g of metal elemental Co evenly, process it into a 2-3mm spherical shape, and put it in the fixed bed of the catalytic evaluation device , a catalyst for catalytic cracking of tar, when the bed reaches a temperature of 650°C, start adding tar for catalytic cracking reaction. The experimental results are listed in Table 2.

Embodiment 3

[0030] Example 3: Weigh 200.72g of CaO and 37.50g of metallic elemental Co, mix them uniformly physically, process them into 2-3mm spheres and place them in a fixed bed in a catalytic evaluation device, as a catalyst for catalytic cracking of tar, as a bed After the layer reaches a temperature of 650°C, tar is added for catalytic cracking reaction. The experimental results are listed in Table 2.

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Abstract

The invention provides a biomass tar cracking catalyst. The catalyst takes granular calcium oxide or magnesium oxide or biomass pyrolytic carbon or ash formed after husk is gasified or a mixture of the granular calcium oxide, the magnesium oxide, the biomass pyrolytic carbon and the ash as a carrier and takes supported transition metal element Co as an active component, wherein the content of Co is over 15% of the mass of the catalyst, and the transition metal element Co has the grain diameter of 0.5-2mum and the apparent density of 0.6-1.2g / cm<3>. The catalyst is used at the temperature of 650-1000 DEG C. By using the catalyst, tar generated in the biomass gasification process is cracked and mainly converted into H2, CH4 and a small amount of accumulated C, and the cracking rate can be up to 100%. Compared with the traditional tar cracking catalyst, the biomass tar cracking catalyst has low use temperature, high catalytic activity, simple preparation process and easiness in industrialized production.

Description

technical field [0001] The invention relates to biomass energy renewable energy utilization technology. In particular, it relates to the active component and carrier of the pyrolysis catalyst of tar produced in the process of biomass gasification. technical background [0002] Energy and environmental protection are the two major themes in the development of today's society. With the increasing depletion of fossil energy and the environmental pollution caused by its use, people have to look for a renewable and inexhaustible energy. At present, biomass energy, as a renewable and environment-neutral energy source, has attracted more and more attention. Biomass gasification technology is the main technology adopted for large-scale utilization of biomass energy. However, the process of biomass gasification is inevitably accompanied by the generation of tar. Due to the condensation of tar at low temperature and the adhesion of fly ash, the pipeline is blocked, the equipment is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78C10J3/64
CPCY02P20/52
Inventor 吴正舜唐宁路刘晓燕孙婷婷李学慧陈义锋
Owner HUAZHONG NORMAL UNIV
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