摘要:
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.
摘要:
A method for naphthalene removal from a gas using a solid adsorbent material including benzene for the removal. The removal can be applied to, for example, a crude syngas main stream and/or a carbon dioxide exhaust side stream. The adsorption to the adsorbent material can be reversible so that the material can be reused and naphthalene and possibly benzene can be recovered after regeneration.
摘要:
A method for adjusting hydrogen to carbon monoxide ratio of syngas contaminated by sulfur impurities involving a water gas shift (WGS) reaction. In light of the presence of the sulfur impurities, the WGS can be implemented as a sour gas shift. WGS can provide good results by using a non-sulfided catalyst. Conditions can be employed which contribute to further enhanced CO-conversion in the reaction. The hydrocarbons or derivatives thereof obtainable from the method can further be refined and used for production of fuels or lubricants for combustion engines.
摘要:
Method of producing a hydrocarbon composition in which a biomass raw-material is gasified to produce a raw syngas containing carbon monoxide, carbon dioxide and hydrogen, the hydrogen-to-carbon monoxide ratio being about 0.5 to 1.7. A part of the impurities is removed to produce a clean syngas which is fed into a Fischer-Tropsch reactor where a significant part of the carbon monoxide and hydrogen is converted to a hydrocarbon composition containing C4-C90 hydrocarbons. A hydrocarbon composition is recovered which mainly contains hydrocarbons which are solid or semisolid at ambient temperature and pressure and an off-gas of the Fischer-Tropsch reactor, including hydrocarbons which are gaseous at ambient temperature and pressure, is used for producing hydrogen gas. By introducing hydrogen into the clean syngas, the hydrogen to carbon monoxide ratio can be increased and by using off-gas-produced hydrogen, the capacity of the process is significantly improved.