A gaseous hydrocarbon stream (10) is cooled against a first refrigerant and a second refrigerant, to produce a liquefied hydrocarbon stream (20). The first refrigerant is cycled in a first refrigerant circuit (100), comprising compressing in a first compre...

A fuel stream is fed to a gas turbine. An oxygen-containing stream is chilled to provide a chilled oxydizing stream, which is also fed to the gas turbine. The fuel stream is combusted in the gas turbine with the chilled oxydizing stream. Chilling duty is p...

Method and apparatus for cooling a hydrocarbon stream (520) to produce an at least partially liquefied hydrocarbon stream (530). A cooled main refrigerant stream (245) is further cooled against at least a part of one or more expanded cooled pre-cooling ref...

A fuel composition for use in a homogeneous charge compression ignition (HCCI) engine, comprising a gasoline base fuel and one or more additional components selected from the group consisting of (i) a diesel fuel ignition improver, (ii) a Fischer-Tropsch d...