Study compares C2-recovery for conventional turboexpander, GSP

12/08/2008
Among the various ethane-recovery processes, the turboexpander process is the most widely used. Proponents of the gas subcooled process (GSP), however, claim it achieves higher recovery than the conventional turboexpander process.Several new processes based on modifications to the GSP have appeared: cold residual recycle (CRR), IPSI LLC’s Enhanced NGL Recovery, Fluor’s Recycle Split Vapor (RSV), and RSV with enrichment (RSVE).This article presents results of a comparison of the two processes for ethane recovery: the GSP and the conventional turboexpander process. To perform a fair comparison, we selected four different feeds, ranging from lean to rich gas, with C2+ contents ra...
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