Some methane always goes to the exhaust stream and this methane slip can be even larger than in a Combined Heat and Power engine — if you are not managing the process correctly. Should more than 2% of incoming methane end up in the atmosphere, your greenhouse gas emissions would be the same or worse than CO2 emissions from fossil fuels. In fact, emission limits for methane are usually even stricter. Offgas without RTO or other forms of methane removal typically consists of over 95% CO2, ~1% CH4, with the rest typically being nitrogen and traces of oxygen and water vapor.

CH4 emissions can be reduced by carefully adjusting your upgrading process with inline process monitoring, and the MGP262 is a perfect tool for that. If you use Regenerative Thermal Oxidation (RTO) to further reduce methane emissions, an inline methane measurement before the RTO will be useful. The bottom line is that unless you pay attention to CH4 emissions in the offgas you will lose money and harm the environment.