Sasol Technology Proprietary Limited

Jan Hendrik Duvenhage Boshoff

Andre Peter Steynberg

Isabella Lodewina Greeff

A process () for co-producing power and hydrocarbons includes gasifying () coal to produce a synthesis gas () and a combustion gas () both comprising at least COHand COand being at elevated pressure, separating CO() from the synthesis gas, and synthesizing () hydrocarbons from the synthesis gas. Power () is generated from the combustion gas, including by combusting () the combustion gas in the presence of oxygen and in the presence of at least a portion of the separated CO2 as moderating agent to produce a hot combusted gas () which includes CO. The CO2 is recycled () or recovered from the combusted gas. In certain embodiments, the process () produces a COexhaust stream () for sequestration or capturing for further use.

Co-production of power and hydrocarbons

A process () for co-producing power and hydrocarbons includes in a wet gasification stage (), gasifying coal to produce a combustion gas () at elevated pressure comprising at least Hand CO; enriching () a first portion of the combustion gas with Hto produce an H-enriched gas (); and generating power () from a second portion of the combustion gas. In a dry gasification stage (), coal is gasified to produce a synthesis gas precursor () at elevated pressure comprising at least Hand CO. At least a portion of the H-enriched gas () is mixed with the synthesis gas precursor () to provide a synthesis gas for hydrocarbon synthesis, with hydrocarbons being synthesized () from the synthesis gas. In certain embodiments, the process () produces a COexhaust stream () for sequestration or capturing for further use.

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Vaalpark, South Africa

Jan Hendrik Duvenhage Boshoff