Method and device for preparing high-purity hydrogen from biomass

A biomass, high-purity technology, applied in the fields of biofuels, production of combustible gas, chemical instruments and methods, etc., can solve the problems of many components in hydrogen-rich gas products, complicated reaction process, quantitative hydrogen production process, etc., to achieve simplification Pressure swing adsorption purification system, high yield, the effect of increasing the reactivity

Inactive Publication Date: 2013-04-03
TIANJIN UNIV
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Problems solved by technology

The current biomass thermochemical hydrogen production methods mainly include biomass gasification hydrogen production, pyrolysis product catalytic reforming hydrogen production, supercritical water gasification hydrogen production and other methods, but the reaction process is generally complicated (the hydrogen production process cannot be fully analyzed). Quantitative description and analysis of the reaction process), there are too many components in the hydrogen-rich gas product (except H 2 , CO, CO 2 、CH 4 In addition, it also contains a variety of organic gas components such as alkanes, olefins, and aromatics), the hydrogen content is low (usually the hydrogen content is between 30% and 60%), and technical problems such as difficulty in later purification and excessive energy consumption

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  • Method and device for preparing high-purity hydrogen from biomass

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Embodiment 1

[0044] Using sawdust as biomass raw material, the process is as described above, and the main reaction parameters are as follows:

[0045] (1) Biomass gasification process:

[0046] The gasification equivalent ER is 0.2, and the gasification reaction temperature is 700°C. The temperature of the generated gasified gas is 680°C, and the gas yield is 2.3Nm 3 (gas) / kg (wood chips).

[0047] (2) Slow low temperature carbonization process:

[0048] The carbonization heating rate is 5°C / min, and the carbonization temperature is 350°C. The yield of low-temperature charcoal is 0.4kg (low-temperature charcoal) / kg (wood chips).

[0049] (3) Rapid high-temperature carbonization process:

[0050] The carbonization heating rate is 100°C / min, and the carbonization temperature is 900°C. The yield of high-reactivity high-temperature charcoal is 0.9kg (high-temperature charcoal) / kg (low-temperature charcoal).

[0051] (4) Carbon water reaction process

[0052] The molar ratio of water v...

Embodiment 2

[0056] Using rice husk as biomass raw material, the main reaction parameters are as follows:

[0057] (1) Biomass gasification process:

[0058] The gasification equivalent ER is 0.22, and the gasification reaction temperature is 740°C. The temperature of the generated gasification gas is 690°C, and the gas yield is 1.9Nm 3 (gas) / kg (rice husk).

[0059] (2) Slow low temperature carbonization process:

[0060] The carbonization heating rate is 7°C / min, and the carbonization temperature is 370°C. The yield of low-temperature charcoal is 0.3kg (low-temperature charcoal) / kg (rice husk).

[0061] (3) Rapid high-temperature carbonization process:

[0062] The carbonization heating rate is 148°C / min, and the carbonization temperature is 930°C. The yield of high-reactivity high-temperature charcoal is 0.7kg (high-temperature charcoal) / kg (low-temperature charcoal).

[0063] (4) Carbon water reaction process

[0064] The molar ratio of water vapor to carbon is 6:1, and the sup...

Embodiment 3

[0068] With crushed cotton stalks as biomass raw material, the main reaction parameters are as follows:

[0069] (1) Biomass gasification process:

[0070] The gasification equivalent ER is 0.25, and the gasification reaction temperature is 800°C. The temperature of the generated gasification gas is 720°C, and the gas yield is 2.1Nm 3 (gas) / kg (cotton straw).

[0071] (2) Slow low temperature carbonization process:

[0072] The carbonization heating rate is 10°C / min, and the carbonization temperature is 400°C. The yield of low-temperature charcoal is 0.33kg (low-temperature charcoal) / kg (cotton straw).

[0073] (3) Rapid high-temperature carbonization process:

[0074] The carbonization heating rate is 200°C / min, and the carbonization temperature is 1000°C. The yield of high-reactivity high-temperature charcoal is 0.8kg (high-temperature charcoal) / kg (low-temperature charcoal).

[0075] (4) Carbon water reaction process

[0076] The molar ratio of water vapor to carbon...

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Abstract

The invention discloses a method and a device for preparing high-purity hydrogen from biomass. A thermal chemical hydrogen preparation process of biomass is divided into three steps, namely biomass gasification, step-by-step biomass carbonization and water-charcoal reaction. The combustible gas generated by biomass gasification provides heat energy required by the whole production line, and electricity is generated by gas to provide electric energy required by all power equipment, so that biomass is the only energy source of the whole process and ensures zero consumption of external power. The step-by-step biomass carbonization process overcomes the defects of low yield and low biomass charcoal reaction activity of the conventional carbonization process, and greatly improves the reaction activity of the biomass charcoal while ensuring a high yield of biomass charcoal by coupling a slow low-temperature carbonization reaction and a fast high-temperature carbonization reaction; therefore, the water-charcoal reaction is accelerated and the energy consumption in the water-charcoal reaction process is reduced. The content of hydrogen of the generated primary hydrogen-rich gas is over 85%, and can even be more than or equal to 99.99% after purification of a hydrogen purification device.

Description

technical field [0001] The invention relates to a process method and a device for producing high-purity hydrogen from biomass. Including biomass gasification and step-by-step carbonization coupling process, carbon water thermochemical reaction hydrogen production process and pressure swing adsorption process and corresponding device systems. The purity of the hydrogen product is above 99.99%. Background technique [0002] Hydrogen is a high-quality clean energy, and the development of hydrogen energy has far-reaching significance for the future development of human society. At present, the main ways of hydrogen production are: hydrogen production from fossil fuels, hydrogen production from water electrolysis, hydrogen production from methanol, hydrogen production from biomass, etc. Among them, hydrogen production from fossil fuels (coal, oil, natural gas, etc.) accounts for more than 90% of the market. However, fossil fuel itself is a non-renewable energy source, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/02C01B3/50C01B3/00C10J3/20C10J3/60C10J3/66C10J3/84C10J3/72C10J3/80C10B53/02C10B57/02C10B49/02
CPCY02E50/14Y02E50/10
Inventor 张卫江杨肖徐姣
Owner TIANJIN UNIV
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