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Parallel GC for Complete RGA Analysis
Abstract:
A previous application brief (5989-6103EN) has shown that a 7890A GC configured with three parallel channels provides a complete refinery gas analysis (RGA) within six minutes. The configuration for fast RGA in the brief has been updated by adding a fifth valve, which can now be supported by the 7890A GC. The updated configuration is almost the same as the previous one except for the third channel (TCD) for hydrogen analysis using nitrogen or argon as carrier gas to improve hydrogen detectability and linearity. The updated configuration uses a 10-port valve with a pre-column for backflushing late-eluting components while hydrogen is separated on a molsieve column instead of a three-way splitter plus split/splitless inlet.
Keywords:
RGA, Refinery gas, NGA, Natural gas, Parallel GC, Third detector (TCD), Light hydrocarbons, Permanent gas, Refinery Gases/Distillates, Petroleum Composition
Publication Number:
5989-7438EN
Last Updated:
10/29/2009
Number of Pages:
2
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