A gas separation process for treating exhaust gases from the combustion of gaseous fuels, and gaseous fuel combustion processes including such gas separation. The invention involves routing a first portion of the exhaust stream to a carbon dioxide capture step, while simultaneously flowing a second portion...http://www.google.de/patents/US8177885?utm_source=gb-gplus-sharePatent US8177885 - Gas separation process using membranes with permeate sweep to remove CO2 from gaseous fuel combustion exhaust