Biomass-gasifying hydrogen generating serial fluid bed apparatus and method

Abstract

The present invention is one method of generating hydrogen via catalytic thermolysis and gasification of biomass. The hydrogen generating apparatus consists of circulating fluidizing bed, cyclonic separator and bubbling fluidizing bed connected serially. The hydrogen generating process the fluidization of biomass with steam in circulating fluidizing bed with catalyst CaO / MgO grains; the catalytic thermolysis and gasification of biomass to produce hydrogen; the fixation reaction of CO2 in gas product with catalyst CaO / MgO grains to form CaCO3 / MgCO3; the separation of CaCO3 / MgCO3 grains and coke grains in cyclonic separator; burning of coke grains to promote the decomposition of CaCO3 / MgCO3 to release CO2 and high temperature CaO / MgO grains; and returning the high temperature CaO / MgO grains to the circulating fluidizing bed as catalyst and heat source.

Description

technical field [0001] The invention relates to a hydrogen production device and method for biomass catalytic pyrolysis gasification, in particular to a biomass hydrogen production device and method using a circulating fluidized bed. Background technique [0002] Hydrogen is not only an important industrial raw material, but also recognized as the most ideal future clean energy carrier. The production, processing and transportation of fossil fuels (coal, oil, natural gas) will cause varying degrees of pollution to the environment, and the gases such as carbon dioxide and sulfur dioxide generated by their combustion will produce greenhouse effect and acid rain respectively; hydrogen production by using renewable biomass resources , to ensure the security of energy supply and meet the requirements of sustainable development of industrial and agricultural production. [0003] As a low-carbon clean fuel, biomass has high volatile content, high carbon...

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Problems solved by technology

[0005] The existing biomass water vapor catalytic pyrolysis / gasification reactors for hydrogen production use fixed beds and fluidized beds. In fixed bed reactors, the heat and mass transfer rate between biomass and catalyst is low, and it is difficult to quickly pyrolyze biomass. , and the problem of catalyst deactivation is serious; the heat and mass transfer rate in the fluidized bed reactor is high, but the surface carbon of the catalyst particles is serious, which makes the catalyst deactivate rapidly

In addition, the biomass steam gasification reaction produces a large amount of carbon dioxide, which inhibits the progress of the biomass hydrogen production reaction, making it difficult to achieve efficient biomass hydrogen production.

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