The present invention provides a method and {HEAD ~ system} for cooling and liquefying {TAIL ~ a methane rich gas stream} which is at superatmospheric pressure wherein a cascade two refrigeration cycle system is utilized in which an initial refrigeration cycle including a single component refrigerant cools both the methane rich gas stream and the second refrigeration cycle which comprises a multicomponent refrigerant 
for liquefying
The present invention provides a method and { HEAD ~ system } for cooling and liquefying { TAIL ~ a methane rich gas stream } which is at superatmospheric pressure wherein a cascade two refrigeration cycle system is utilized in which an initial refrigeration cycle including a single component refrigerant cools both the methane rich gas stream and the second refrigeration cycle which comprises a multicomponent refrigerant
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH