Conversion of carbonaceous materials to synthetic natural gas by pyrolysis, reforming, and methanation

a carbonaceous material and carbonaceous technology, applied in the direction of combustible gas production, combustible gas purification/modification, sustainable manufacturing/processing, etc., can solve the problems of low efficiency, limited resource and limited resource of the inability to effectively supply electric power from direct combustion of woody biomass

Inactive Publication Date: 2008-01-24
CLEAN ENERGY LLC
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Benefits of technology

[0013]f) passing at least a portion of the liquid fraction and an effective amount of superheated steam to a reforming zone operated at a temperature of about 850° C. to about 1200° C. and a pressure form about 3 psig to about 500 psig wherein said liquid fraction is reformed to produce a synthetic gaseous product comprised of hydrogen, carbon monoxide, carbon dioxide, and methan

Problems solved by technology

The world's energy supplies, particularly liquid and gaseous fuel from fossil fuels, are being depleted faster than they are replaced.
Direct combustion of woody biomass suffers from a limited amount of resource and low efficiency, and, further, only electric power can effectively be supplied from the direct combustion of woody biomass.
At the present time, however, such techniques are not in a practical stage for technical as well as economical reasons.
Also, the use of biomass as t

Method used

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  • Conversion of carbonaceous materials to synthetic natural gas by pyrolysis, reforming, and methanation
  • Conversion of carbonaceous materials to synthetic natural gas by pyrolysis, reforming, and methanation

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Embodiment Construction

[0022]The present invention is directed to the production of synthetic natural gas (predominantly methane) from carbonaceous materials, preferably biomass materials. Synthetic natural gas, also sometimes called “green gas” is a renewable gas from biomass with natural gas specifications. Therefore, it can be transported through the existing gas infrastructure, substituting for natural gas in all existing applications. Another advantage of green gas is that is carbon neutral. That is, using biomass as an energy supply will typically not result in a net CO2 emission since its source can be replanted and uses CO2 from the atmosphere during its growth period.

[0023]While this invention is applicable to a broad range of carbonaceous feedstocks including the traditional naturally occurring solid fossil fuels such as coal, peat, lignite, tar sands, and bitumen from oil shale, the preferred feedstocks for use in the present invention are biomass feedstocks Non-limiting examples of biomass fee...

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Abstract

The production of synthetic natural gas from a carbonaceous material, preferably a biomass material, such as wood. The carbonaceous material is first pyrolyzed, then subjected to steam reforming to produce a syngas, which is then passed to several clean-up steps then to a methanation zone to produce synthetic natural gas.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This is based on Provisional Application 60 / 832803 filed Jul. 24, 2006.FIELD OF THE INVENTION[0002]The present invention relates to the production of synthetic natural gas from a carbonaceous material, preferably a biomass material, such as wood. The carbonaceous material is first pyrolyzed, then subjected to steam reforming to produce a syngas, which is then passed to several clean-up steps then to a methanation zone to produce synthetic natural gas.BACKGROUND OF THE INVENTION[0003]The world's energy supplies, particularly liquid and gaseous fuel from fossil fuels, are being depleted faster than they are replaced. Consequently, the development of techniques for producing energy are urgently needed for avoiding the depletion of limited fossil fuel resources as well as for alleviating the global warming problem. Among various types of natural energy, biomass energy is regarded as one of the most promising natural energy from the viewpoint ...

Claims

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Application Information

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IPC IPC(8): C10J3/46
CPCC10J3/466C10K3/026C10J3/66C10J2300/0916C10J2300/093C10J2300/1662C10K1/003C10K1/004C10K1/005C10K1/024C10K1/026C10K1/101C10K1/12C10K1/143C10K1/165C10K1/18C10K1/20C10L3/08C10L3/102C10K1/002C10K1/02C10K3/00C10J3/62Y02P20/145Y02P20/00
Inventor PEARSON, STANLEY R.
Owner CLEAN ENERGY LLC
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