C2 from methane

Figure 33.22 Simplified scheme of one of the indirect routes to produce C2 from methane.

The most promising new membrane-based vapor separation applications include (i) separation of higher hydrocarbons (C2+) from methane for dewpoint and heating value control of natural gas, (ii) recovery of hydrogen and/or hydrocarbons from petroleum refinery waste gases, and (iii) separation of olefins (ethylene or propylene) from polyolefin polymerization purge gas streams. In all of these applications, the higher hydrocarbons are the minor components in the feed gas. To minimize... 

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