IGCC technology per se involves the potential of highest efficiencies,
thus reducing the CO2 output accordingly. Moreover, the intermediate
stage of synthesis gas makes it possible to remove most of the carbon
compounds before combustion with acceptable additional auxiliary power
demand. The separated CO2 stream is of highest purity and therefore s
uited for disposal e.g. in the deep sea or for reuse in chemical synth
eses. So, methanol synthesis based on power plant CO2 has been investi
gated. This contribution presents the results of a pre-basic design fo
r a coal-fired 300 MW-class IGCC power plant with methanol production
using an external H-2 source. Based on a Siemens Model V94.3A gas turb
ine-generator, the standard IGCC has been equipped with plant componen
ts including CO shift reactors, CO2 scrubber, methanol synthesis react
ors and distillation unit; additional investment costs amount to appro
x. 25 %. This concept is based solely on proven process engineering me
thods. Primary energy utilization as well as the resulting methanol pr
oduction costs based on appropiate generating costs are discussed. Com
parative CO2 emission figures make the advantage of such a coproductio
n process regarding this perfectly clear. (C) 1997 Elsevier Science Lt
d.