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Process and method thereof for preparing lower alcohol by biomass

A biomass and low-carbon alcohol technology, applied in the fields of biofuels, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve the problems of reasonable matching and the overall economy needs to be further improved, and achieve obvious social and environmental benefits. , reduce the tar content and methane content, the effect of efficient conversion

Inactive Publication Date: 2010-02-24
青岛生物能源与过程研究所
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Problems solved by technology

Although the main technical units of producing low-carbon mixed alcohol fuels from biomass through syngas have been developed to varying degrees at home and abroad, the reasonable matching of each technical unit and the overall economic efficiency need to be further improved

Method used

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  • Process and method thereof for preparing lower alcohol by biomass

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Embodiment

[0050] Taking corn cob as raw material below, the specific content of the present invention is described in further detail.

[0051] (1) Biomass gasification:

[0052] Biomass corncobs are fed into the gasifier from a quantitative feeder at a rate of 50kg / h, and gasified by a two-stage directional gasification method. The temperature of the pyrolyzer during gasification is 500°C, and the high temperature The zone temperature is controlled at 1000°C, and the H in the resulting syngas 2 / CO=1.02, the tar content is less than 8mg / Nm 3 , methane content 5%, biomass gasification efficiency = 80%, carbon conversion rate = 98%.

[0053] (2) Gas purification:

[0054] Syngas from the gasifier is dry-filtered at 240°C to remove impurities such as ash and carbon black, and finely desulfurized by industrial technology to remove sulfide impurities in the gas. The ash in the gas is 0.09%, and the moisture = 2.0%, sulfur content = 0.1mg / Nm 3 .

[0055] (3) Catalytic synthesis

[0056...

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Abstract

The invention provides a method for preparing lower alcohol by biomass, which uses straws, branches and other agriculture and forestry solid waste as raw materials. The method comprises the steps of biomass gasification, gas purification, catalytic synthesis, catalytic reforming, dehydration, separation, rectification and the like. The process has simple process, has requirement on H2 / CO / CO2 in synthesis gas lower than requirement without water gas transforming adjustment or CO2 pre-desorption, is particularly suitable for biomass based synthesis gas with lower H2 / CO and rich in CO2; after catalytic synthesis, tail gas rich in CO2, methanol and other light hydrocarbons is reformed with water vapor, and enters a catalytic synthesis unit to further synthesize a target product lower alcohol so as to sufficiently utilize carbon and hydrogen resources of the biomass; and the obtained crude alcohol product can be directly used as substitute fluid fuel or clean gasoline additive, and can be prepared into chemical single methanol by further separation and rectification.

Description

technical field [0001] The invention relates to a method for producing low-carbon alcohol from biomass. Background technique [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 manufacture of vehicle liquid fuel and chemical products from renewable energy has attracted increasing attention. Biomass is a renewable energy with abundant reserves. As an alternative energy source, it can realize CO 2 Zero emission, and the low content of S and N in it can greatly reduce the greenhouse effect and environmental pollution. Biomass, as the only renewable energy that can be directly converted into liquid fuel, has attracted widespread attention from governments, enterprises and academia around the world. Biomass liquid fuels mainly include oxygenated fuels such as bioethanol, biodiesel, directly liquefied bio-oil, and indire...

Claims

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Application Information

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IPC IPC(8): C07C29/151C10J3/70B01J23/89
CPCY02E50/18Y02E50/10
Inventor 杨成李建青何涛吴晋沪
Owner 青岛生物能源与过程研究所
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