Plant and process for separation of sulfur-containing components, H.sub.2S, COS and mercaptans from methanol which is used as absorbent within the Rectisol process by hot regeneration of the methanol laden in the absorption and an additional step for separation of the mercaptans from the methanol by stripping.

Method and system for the combined production of methanol and of ammonia, and method for producing a fuel using methanol, wherein a carbon-containing energy carrier flow and an oxygen flow from an oxygen-producing assembly are fed to a synthesis gas reactor assembly for obtaining a synthesis gas flow with hydrogen and carbon oxides, wherein the synthesis gas flow is fed to a methanol reactor assembly for the partial conversion into methanol, and wherein, from the methanol reactor assembly, a residual gas flow is obtained from which a hydrogen-containing flow is obtained, which is at least partially fed to an ammonia reactor assembly and at least partially converted into ammonia there. In an enrichment step, the molar fraction of hydrogen in the synthesis gas flow obtained from the synthesis gas reactor assembly is increased relative to the molar fraction of carbon oxides prior to the feeding to the methanol reactor assembly.

In a process for separating a mixture containing carbon monoxide, hydrogen and carbon dioxide, the mixture cooled in a heat exchanger is contacted by a stream of liquid methanol at a temperature below ?40? C. to produce carbon dioxide enriched methanol and a carbon dioxide depleted gas relative to the cooled mixture, the carbon dioxide depleted gas is cooled in the heat exchanger and is sent to a separation unit to produce a carbon monoxide enriched stream and a hydrogen enriched stream and the streams enriched in carbon monoxide and hydrogen are heated in the heat exchanger by exchanging heat with the mixture.

The present invention demonstrates a solid fuel grade gasification-combustion dual bed poly-generation system, comprising a combustion system, a gasification system, a synthesized gas cooling and purifying system and a synthesized gas methanation system. The combustion system is connected with the gasification system through a circulating material return system. The gasification system mainly adapts the circulating fluidized-bed combustion mode. The gasification system adapts the fluidized-bed incomplete gasification method and the generated semi-coke is returned to the combustion system for re-utilization. The synthesized gas purifying and cooling unit adapts water cycling and combustible recycling. The by-products, CO.sub.2 and steam, in the methanation unit can be recovered, so the maximum utilization rate of energy in this system is realized.

The present description is related to the field of hydrocarbon production by gasification of carbonaceous material. It provides a two-stage gas washing method as a part of gas refining. More specifically it discloses a method for hydrogen sulfide and carbon dioxide removal from synthesis gas produced by gasification. It introduces a use of a novel combination of wash approaches for this application. As a specific application, this process is utilized as a part of biomass to liquid (BTL) process.