Biomass gasification hydrogen-producing system and method

A hydrogen production system and biomass technology, which is applied in the field of hydrogen production, can solve problems such as system complexity, and achieve the effect of energy efficiency and economical utilization

Inactive Publication Date: 2010-07-14
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of calcium oxide can be used to solidify carbon dioxide, but adding calcium oxide at the same time will also make the system more complicated

Method used

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  • Biomass gasification hydrogen-producing system and method

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Experimental program
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Effect test

Embodiment 1

[0030] Use metal oxide Fe 2 o 3 As an oxygen carrier and heat carrier, it is oxidized in the air reactor 1 to obtain oxygen. Due to the high reaction temperature and its exothermic oxidation reaction, Fe 2 o 3 When leaving the air reactor 1, it carries a large amount of heat, and enters the fuel reactor 2 as a heat carrier and oxygen carrier to provide heat and oxygen for the reaction. Since the temperature of the moving bed gasifier 3 is lower than that of the fuel reactor 2, the Fe provided by the fuel reactor 2 3 o 4 Entering the moving bed gasifier 3 can still provide heat for gasification.

[0031] The main reactions in the moving bed gasifier are as follows:

[0032] Biomass Volatile Reactions:

[0033] CO+H 2 O→CO 2 +H 2

[0034] CH 4 +H 2 O→CO+3H 2

[0035] Biomass gasification: C+H 2 O→CO+H 2

[0036] Biomass (the biomass is particles with a water content lower than 15wt% after crushing) is added to the moving bed gasifier 3, and steam is fed into the g...

Embodiment 2

[0049] The metal oxide NiO is selected as the oxygen carrier and heat carrier. Ni is oxidized in the air reactor 1 to obtain oxygen. Because the reaction temperature is high and it is an exothermic oxidation reaction, NiO carries a large amount of heat when it leaves the air reactor 1, and is used as the heat carrier. And the oxygen carrier enters the fuel reactor 2 to provide heat and oxygen for the reaction. Since the temperature of the moving bed gasifier 3 is lower than that of the fuel reactor 2, the Ni provided by the fuel reactor 2 enters the moving bed gasifier 3 and can still provide heat for gasification.

[0050] Biomass (the biomass is particles with a water content lower than 15wt% after crushing) is added to the moving bed gasifier 3, and steam is fed into the gasification at 550°C. The main component of the combustible gas obtained from the gasification is h 2 , CO, CH 4 , CO 2 、H 2 O and a small amount of hydrocarbons, the combustible gas obtained by gasifi...

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Abstract

The invention discloses a biomass gasification hydrogen-producing system and a method, which belongs to the technical field of hydrogen production. Biomass gasification hydrogen production and chemical-looping combustion are combined to realize low-cost separation of carbon dioxide; and the fractional utilization of matter and energy is realized via the circulation among three beds with metal oxide as a heat carrier and an oxygen carrier. The system mainly comprises an air reactor, a fuel reactor, a moving bed gasifier, a gas-solid separation device, a gas purification device, a hydrogen separation device and a follow-up hydrogen-producing device. The system not only can realize hydrogen production, but also can realize hydrogen production with near zero emission of CO2, thereby realizing efficient cleaning and utilization of biomass.

Description

technical field [0001] The invention belongs to the technical field of hydrogen production, and in particular relates to a biomass gasification hydrogen production system and method. Background technique [0002] From December 7th to 18th, 2009, the Copenhagen World Climate Conference was held in Copenhagen, the capital of Denmark. The world's climate change and greenhouse gases received unprecedented attention again. The issue of reducing greenhouse gas emissions from traditional fossil fuel combustion has become the focus of focus issues. In addition, with the increasing depletion of traditional fossil energy, it is urgent to seek new clean energy, and among many new energy, hydrogen is one of the most suitable forms. [0003] Hydrogen, as a new type of clean energy with great application potential, can not only be used as fuel, but also an important chemical raw material. The most important thing is that the product of hydrogen energy conversion is water, which can reali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/02
Inventor 董长青蒋景周杨勇平张俊姣
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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