by
GasMan » Mon Jan 09, 2017 1:53 pm
Your two 'peaks' are as follows.
peak 1 CO,CH4,H2,N2
peak 2 CO2
The best column to separate CO,CH4,H2 and N2 is a molecular sieve column. However, this column will absorb CO2. The usual way to analyze this type of sample is to use the two columns with two valves. One valve injects the sample and the other is configured to isolate the mol sieve column. You inject the sample into the Porapak Q column where CO,CH4,H2 and N2 will pass through quickly into the mol sieve column. The mol sieve column is then isolated, allowing the CO2 to elute and bypass the mol sieve column and go to the detector. The mol sieve column is then switched back into the carrier gas stream allowing H2,N2, CH4 and CO to elute in that order.
The post above mentioned Shincarbon. You should look at the following web site which gives chromatograms on Shincarbon columns.
http://www.hichrom.com/assets/Products/ ... N-ST_E.PDFGasman