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Method and device for preparing biomass hydrogen-rich combustion gas

A preparation device and biomass technology, which are applied in the preparation of biofuels, liquid hydrocarbon mixtures, chemical instruments and methods, etc., to achieve the effects of reducing carbon deposition, realizing energy conservation and emission reduction, and reducing difficulty

Inactive Publication Date: 2008-01-09
ENERGY RES INST OF SHANDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a method for preparing high-efficiency biomass hydrogen-rich gas with relatively mild reaction conditions, normal pressure operation and no introduction of air in the process

Method used

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  • Method and device for preparing biomass hydrogen-rich combustion gas
  • Method and device for preparing biomass hydrogen-rich combustion gas
  • Method and device for preparing biomass hydrogen-rich combustion gas

Examples

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Embodiment 1

[0031] Example 1: rice husk powder is the raw material, the moisture content of the raw material is 12%, the pyrolysis temperature is 550°C, the residence time in the pyrolysis reaction chamber is 6.5 minutes, the cracking temperature is 850°C, the cracking reaction time is 3 seconds, a dolomite catalyst is used, and water vapor is added The amount is 10% of the biomass mass, and the gas composition (volume content) is: hydrogen 35.9%, carbon monoxide 24.0%, carbon dioxide 25.5%, methane 12.1%.

Embodiment 2

[0032] Example 2: rice husk powder is the raw material, the moisture content of the raw material is 12%, the pyrolysis temperature is 600°C, the residence time in the pyrolysis reaction chamber is 6.5 minutes, the cracking temperature is 900°C, the cracking reaction time is 4.5 seconds, a dolomite catalyst is used, and water vapor is added The amount is 20% of the biomass mass, and the gas composition (volume content) is: hydrogen 45.6%, carbon monoxide 14.7%, carbon dioxide 30.8%, methane 7.4%.

Embodiment 3

[0033] Example 3: rice husk powder is the raw material, the moisture content of the raw material is 12%, the pyrolysis temperature is 650°C, the residence time in the pyrolysis reaction chamber is 8 minutes, the cracking temperature is 950°C, the cracking reaction time is 4.5 seconds, and the secondary cracking section adopts dolomite catalyst , the amount of steam added is 30% of the biomass mass, and the gas composition (volume content) is: hydrogen 52.1%, carbon monoxide 9.8%, carbon dioxide 33.2%, methane 3.2%. It can be seen that the increase of the secondary cracking temperature and the addition of water vapor can significantly increase the hydrogen yield and reduce the methane content.

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Abstract

Production of biomass hydrogen-enriching fuel gas is carried out by thermal cracking for biomass raw materials at 550-650 deg. C under isolated air, converting it into gas-phase product and residual carbon, separating residual carbon from gas-phase product, transferring out of reacting system, burning to obtain heat energy, cracking at 800-950 deg. C and reforming into hydrogen, methane and other light hydrocarbons. It combines bitter spar catalyst and steam; it can eliminate tar, decrease methane content and increase hydrogen content. Hydrogen content reaches to 30%-55 wt%.

Description

technical field [0001] The invention relates to a method for preparing biomass hydrogen-rich gas and a device for realizing the method. technical background [0002] The utilization process of hydrogen is clean and efficient, and has the potential to be an important follow-up energy source after the depletion of fossil fuels. The hydrogen production process using conventional fossil fuels such as oil, natural gas, and coal generally has serious environmental pollution, especially the large amount of carbon dioxide and other emissions that cause the greenhouse effect, causing irreversible deterioration of the environment and ecology. Biomass resources are huge in quantity and in various forms, including agricultural and forestry residues, leftovers from food processing and forest product processing, and municipal solid waste. At the same time, biomass energy is a clean energy source with low sulfur and zero carbon dioxide emissions, which can avoid environmental pollution du...

Claims

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Application Information

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IPC IPC(8): C10L3/00C10B53/02C10G1/00C01B3/26
CPCY02E50/14Y02E50/10
Inventor 张晓东孙立陈雷赵保峰张杰许敏
Owner ENERGY RES INST OF SHANDONG ACAD OF SCI
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