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Method for preparing hydrogen from biomass

A biomass and raw material technology, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve problems such as high energy consumption, high gasification temperature, and high equipment requirements, and achieve low equipment investment, high purity, and low operating costs Effect

Inactive Publication Date: 2009-01-21
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a low-energy , Low requirements on equipment, can also improve the purity and yield of hydrogen, no secondary pollution in the production process, and a method for preparing high-purity hydrogen using biomass as a raw material that is conducive to greenhouse gas emission reduction

Method used

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  • Method for preparing hydrogen from biomass
  • Method for preparing hydrogen from biomass

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Experimental program
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Effect test

Embodiment 1

[0051] Explain in conjunction with accompanying drawing 1:

[0052] The raw material biomass less than 50 meshes is added into the hopper, and enters into the normal pressure bubbling fluidized bed rapid pyrolysis reactor 3 through the double screw feeder 2 for rapid pyrolysis. The pyrolysis temperature is 470°C, and the pyrolysis reaction pressure is (gauge pressure) 40mmH 2 O, the amount of raw material added is 100g / h. The fluidization gas from the fluidization gas generator enters the cavity of the reactor and then enters the reactor 3 through the distribution plate to fluidize the biomass and quartz sand. The steam catalytic reforming reaction temperature is 850°C, and the catalyst used is 7% Fe by mass fraction 2 o 3 ; Mass fraction 18% NiO; Mass fraction 75% dolomite catalyst, particle size is 2mm, catalytic pressure is 40mmH 2O (gauge pressure), the medium temperature shift reaction temperature is 450°C, and the low temperature shift reaction temperature is 300°C. ...

Embodiment 2

[0054] Explain in conjunction with accompanying drawing 1:

[0055] The raw material biomass less than 50 meshes is added into the hopper, and enters into the normal pressure bubbling fluidized bed rapid pyrolysis reactor 3 through the double screw feeder 2 for rapid pyrolysis. The pyrolysis temperature is 550°C, and the pyrolysis reaction pressure is (gauge pressure) 65mmH 2 O, the amount of raw material added is 100g / h. The fluidization gas from the fluidization gas generator enters the cavity of the reactor and then enters the reactor 3 through the distribution plate to fluidize the biomass and quartz sand. The steam catalytic reforming reaction temperature is 800°C, and the catalyst used is 7% Fe by mass fraction 2 o 3 ; Mass fraction 18% NiO; Mass fraction 75% dolomite catalyst, particle size is 2mm, catalytic pressure is 40mmH 2 O (gauge pressure), the medium temperature shift reaction temperature is 450°C, and the low temperature shift reaction temperature is 300°C....

Embodiment 3

[0057] The raw material biomass less than 50 meshes is added into the hopper, and enters into the normal pressure bubbling fluidized bed rapid pyrolysis reactor 3 through the double screw feeder 2 for rapid pyrolysis. The pyrolysis temperature is 600°C, and the pyrolysis reaction pressure is (gauge pressure) 60mmH 2 O, the amount of raw material added is 100g / h. The fluidization gas from the fluidization gas generator enters the cavity of the reactor and then enters the reactor 3 through the distribution plate to fluidize the biomass and quartz sand. The steam catalytic reforming reaction temperature is 900°C, the catalyst used is a mixture of YWC-95 and CaO, wherein the content of YWC-95 is 97%, the particle size is 1mm, the content of CaO is 3%, and the size is less than or equal to 100 mesh , the catalytic pressure is 45mmH 2 O (gauge pressure). Water vapor and raw material mass ratio are 4, and the content (volume percentage) of hydrogen in crude gas after reaction reac...

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Abstract

The invention discloses a method for preparing hydrogen gases by taking biomass as a material. The method comprises the following steps that: the biomass materials are subjected to fast thermal cracking, and directly subjected to vapor catalytic reforming. The method is characterized in that the fast thermal cracking temperature is lower and between 350 and 600 DEG C. The preparation method of the invention has the advantages of low energy consumption, low requirement on equipment, high hydrogen purity and yield and no secondary pollution in the production process; moreover, the preparation method facilitates the emission reduction of greenhouse gases.

Description

technical field [0001] The invention relates to a method for preparing hydrogen, in particular to a method for preparing hydrogen by using biomass as a raw material. Background technique [0002] Energy is the material basis for the existence and development of human society. Although coal, oil and natural gas are still the main sources of energy and chemical raw materials in today's world, with the depletion of these fossil energy sources and the increasingly serious environmental problems caused by the use of fossil energy sources, it is necessary to seek and develop new energy sources, especially those with little environmental pollution. Renewable energy is imminent. [0003] Hydrogen energy has many advantages such as abundant resources, diverse sources, no pollution, storability, and regeneration. It has been generally regarded as the most ideal pollution-free green energy in the new century. At present, hydrogen production from various fossil fuels is the most impor...

Claims

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Application Information

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IPC IPC(8): C01B3/32
Inventor 张尤华颜涌捷张素平许庆利王复辛善志戎欣黄清发
Owner EAST CHINA UNIV OF SCI & TECH
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