Method for synthesizing dimethyl ether by adopting biomass indirect liquification one-step process

A technology of biomass and dimethyl ether, which is applied in the field of synthesizing dimethyl ether by utilizing biogas reforming biomass gasification gas

Inactive Publication Date: 2004-02-25
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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Problems solved by technology

The gasification gas produced by biomass air-steam catalytic gasification is reformed with methane to prepare synthesis gas to directly synthesize clean fuel dimethyl ether. This is a new green synthesis process, which has not been reported so far.

Method used

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  • Method for synthesizing dimethyl ether by adopting biomass indirect liquification one-step process

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Embodiment

[0016] The biomass fir powder enters the fluidized bed gasification furnace (2) from the screw feeder (4), the air is blown in from the lower part of the gasification furnace (2) through the Luo secondary fan, and the high-temperature water produced by the steam generator (3) Steam (400K) enters the gasifier (2) at different heights, and the biomass undergoes air-steam catalytic gasification in the gasifier (2), and the H in the gasification gas 2 :CO:CO 2 :N 2 The ratio is 30:10:20:30; the gasified gas from the gasifier (2) enters the tar cracker (6) for catalytic cracking of tar after the cyclone separator (5) removes dust and coke, and the tar content is lower than 50 mg / N m 3 , the water washing spray tower (7) deeply purifies the gasification gas; the biogas produced by the biogas generator (8) is purified and mixed with the gasification gas through the mixer (9) and then enters the reforming reactor (10) catalytic reforming system Take synthesis gas, H in the synthes...

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Abstract

The present invention relates to a method for synthesizing dimethyl ether by high-effectively cleanly utilizing biomass. It utilizes the gasified gas produced by catalytic gasification of biomass air-water vapor, and makes the gasified gas undergo the process of methane reformation to prepare synthetic gas, and utilizes the synthetic gas to directly synthesize clean fuel dimethyl ether.

Description

Technical field: [0001] The invention relates to a new method for high-efficiency and clean utilization of biomass, and further relates to a new method for synthesizing dimethyl ether by reforming biomass gasification gas with biogas. technical background: [0002] Due to the limited resources of fossil energy such as oil, coal and natural gas, a large amount of exploitation and use will inevitably lead to the depletion of conventional energy in the future, and the production of fuel from syngas has attracted increasing attention. Dimethyl ether is an organic chemical product and clean fuel with great development potential. Experts in the United States believe that dimethyl ether is the first choice among new synthetic fuels in the 21st century. It is mainly used as a propellant for aerosols and as a chemical raw material, to replace diesel as a clean vehicle fuel and to replace liquefied petroleum gas as a domestic fuel. Biomass is a renewable energy with abundant reserve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/01C07C43/04
Inventor 王铁军常杰吕鹏梅祝京旭
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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