A helium plant processes a gas stream containing 3mol% helium from an NRU at an LNG plant. The balance of the feed contains about 2mol% methane and the remainder is nitrogen. (a) If the plant produces...

A helium plant processes a gas stream containing 3mol% helium from an NRU at an LNG plant. The balance of the feed contains about 2mol% methane and the remainder is nitrogen. (a) If the plant produces a nominal 150 MMscf/year, what is the feed daily gas rate to the plant? (b) How much air would have to be processed to obtain the same He production rate? Assume the helium content of air is 5 ppmv