Oxy-co-gasification is similar to oxy-gasification but replacing part of the coal by biomass, which implies an
additional CO2 emissions reduction. Oxy-co-gasification of coal with straw or sewage sludge in an IGCC has
been studied by British Coal. The University of Essen researched the use of coal/biomass combinations for
IGCC applications, concluding that up to 10% biomass in an oxygen-blown entrained blown gasifier is
technically feasible although net electrical efficiencies would be slightly lower due to energy needed for biomass
pre-treatment [11]. Oxy-co-gasification of coal and biomass in Buggenum IGCC Power Plant has also been
proposed in a study that consists of two parts: preliminary desk study [12] and exploratory experimental
work [13].