Converting mg/Nm3 CH4 to PPBV
Converting mg/Nm3 CH4 to PPBV
(OP)
I am looking at an engine specification that has a maximum limit on organic silicon in the gas to a combustion engine. I know the concentration of the gas in part per billion and need to know whether further treatment is required. The specification allows for "5 mg/Nm3 CH4." How do I convert this to PPB.





RE: Converting mg/Nm3 CH4 to PPBV
Valuable advice from a professor many years ago: First, design for graceful failure. Everything we build will eventually fail, so we must strive to avoid injuries or secondary damage when that failure occurs. Only then can practicality and economics be properly considered.
RE: Converting mg/Nm3 CH4 to PPBV
ppm(V)=(24.45/Molecular Weight)*mg/cu.m.. The value 24.45 is @ 25 deg.C.. Divide the above answer by 1000 to get ppb(V).