Method for preparing hydrogen-riched gas by solid fuel catalytic gasification

A solid fuel, catalytic gasification technology, applied in the manufacture of combustible gas, hydrogen production, petroleum industry, etc., can solve the problems of difficult control of deactivated catalyst reduction and regeneration, complex reactor structure, limited application conditions, etc., to achieve energy balance Effects that are easy to achieve, highly adaptable to raw materials, and easy to control

Inactive Publication Date: 2007-10-03
DALIAN UNIV OF TECH
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Problems solved by technology

Its shortcoming is that the pyrolysis and gasification of biomass and the steam catalytic decomposition of biomass pyrolysis tar are carried out in the same down-flowing bed and co-current moving bed reactor, and the reaction processes with different properties are optimized and controlled separately. There are difficulties, especially when using catalysts containing nickel active components, that is, nickel-based catalysts, their application conditions are limited
Due to the internal circulation mode, the reduction and regeneration of deactivated catalysts is difficult to control
Even if a nickel-based catalyst is used, due to the short residence time of the pyrolysis tar in the fluidized bed reactor, further reduction of the tar content in the produced gas is still limited, and the hydrogen-rich gas produced still contains a relatively high tar content, which is not suitable for direct used as syngas
In addition, the structure of the internal circulating fluidized bed reactor is more complicated

Method used

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  • Method for preparing hydrogen-riched gas by solid fuel catalytic gasification
  • Method for preparing hydrogen-riched gas by solid fuel catalytic gasification

Examples

Experimental program
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Effect test

Embodiment 1

[0021] In the atmospheric pressure experimental device with a biomass treatment capacity of 1kg / h shown in Figure 1, the biomass raw material used is white pine sawdust, with a particle size of 1-3mm, and its element mass composition on a dry, ash-free basis is: C 50.3%, H 6.7% , O 42.7%, N 0.1%, S 0.2%. The solid thermal carrier catalyst used is natural olivine calcined at 900° C. for 4 hours, and the particle size is 1-2 mm. The temperature of the pyrolysis reactor is controlled to be 600-650°C, the temperature of the riser combustion reactor 1 is 900-950°C, and the temperature of the catalytic reforming reactor 3 is 750-800°C. The biomass feed rate is 0.24-0.30kg / h, the solid heat carrier catalyst circulation rate is 6-8kg / h, the water vapor / biomass mass ratio is 0.3-0.6, and the air volume is 8.0-9.0Nm 3 / h. The data of gas composition and yield are shown in Table 1.

Embodiment 2

[0023] The raw material used is lignite, and its element mass composition on a dry ash-free basis is: C 72.2%, H 5.6%, O 21.1%, N 1.0%, S 0.1%. , all the other are with embodiment 1.

Embodiment 3

[0025] Used solid heat carrier catalyst is limestone, and all the other are the same as embodiment 1.

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Abstract

A process for preparing the H2-enriched gas by catalytic gasification of solid fuel features that the solid catalyst used also as the heat carrier is circulating through riser combustion reactor, solid catalyst storage tank, catalytic reforming reactor and pyrolyzing reactor. In said pyrolyzing reactor, the biomass or coal and the solid heat carrier (catalyst) take part in fast pyrolytic reaction. Its resultant and the water steam take part in catalytic decomposing and reforming reaction to generate H2-enriched gas or synthetic gas.

Description

technical field [0001] The invention belongs to the technical field of energy and chemical industry, and relates to a method for preparing hydrogen-rich gas from solid fuels such as biomass, lignite, non-caking coal, and long-flame coal, or their mixtures through steam catalytic gasification, especially a method Method for producing hydrogen-rich gas by catalytic gasification of solid fuel Background technique [0002] The present invention is an improvement of the prior art ZL03133799.6. ZL03133799.6 provides a method for producing hydrogen-rich gas and high calorific value gas from biomass through steam catalytic gasification by heating with solid heat carrier. Its shortcoming is that the pyrolysis and gasification of biomass and the steam catalytic decomposition of biomass pyrolysis tar are carried out in the same down-flowing bed and co-current moving bed reactor, and the reaction processes with different properties are optimized and controlled separately. There are di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/02C10B49/18C10J3/00
Inventor 徐绍平穆家华于建华扬小芹广家旭刘淑琴刘长厚
Owner DALIAN UNIV OF TECH
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