Method for producing synthesis gas for conversion to products

Abstract

The invention relates to a method for producing synthesis gas for conversion to products, in particular for synthesis gas liquefaction. In order to develop the method further in such a manner that an increase in the synthesis gas production is achieved, the following method steps are carried out: a) feeding a carbon-containing fuel (1) into a reactor (6) in which the fuel (1) is converted to a crude synthesis gas (2); b) purifying the crude synthesis gas (2), wherein the purified synthesis gas (2) with resulting methane is fed as main synthesis gas flow (3) to the synthesis gas conversion, during which an exhaust gas (4) is also produced; c) converting the produced exhaust gas (4) into a pure synthesis gas (5) and feeding the pure synthesis gas into the main synthesis gas flow (3).

Description

technical field [0001] The present invention relates to a method of producing synthesis gas for conversion into products, and in particular to synthesis gas liquefaction. Background technique [0002] Methods of the type mentioned at the outset are known in the prior art. [0003] Thus, a carbonaceous fuel, such as biomass or coal, is fed to a reactor where the gas is converted by means of, for example, entrained-bed gasification, fluidized-bed gasification, or other gasification methods (e.g., fixed-bed gasification) etc.) etc., at high temperature (preferably high temperature in the range of 800°C to 1200°C or more), carbonaceous fuel is reacted with air, oxygen or oxygen-enriched air and also with steam and carbon dioxide to produce mainly Crude synthesis gas composed of hydrogen, carbon dioxide and carbon monoxide. [0004] In a further step of a method of the type described at the outset, the raw synthesis gas produced is purified by removing components such as chlori...

AI Technical Summary

Problems solved by technology

However, there is the problem that in the case of a process of the type described at the outset, the raw synthesis gas always still contains part of methane, which, based on experience, has a methane content of about 4% to 10%

This means that a pure syngas (i.e., made of pure CO and H 2 Composition gas) production, which in turn causes a lot of chemical energy to continue to be stored in methane and higher hydrocarbons, therefore, the efficiency of the overall process of gas liquefaction is impaired

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