while the single pass conversion of co2 is 55%, the overall conversion of ch4 is 55%. the overall yield of yield of co2 with respect to ch4 is 90%. the outlet of the reactor is cooled to condense the ch3oh and h2o, while the remaining gases are recycled. 10% excess steam, based on reaction 1, is fed to the reformer. a stochiometric amount of o2, based on reaction 3, is fed to the co converter, which completely converts co to co2. a stream of co2 is later introduced to tune the reactor inlet stream to have a h2:co2 molar ratio of 3:1. the methane feed contains 99 mol/min of ch4 and 1 mol/min of n2 as an impurity. to prevent build-up of nitrogen in the process, a fraction of the recycle stream is purged. this purge stream contains 5% n2.
