A number of issues have to be taken into account, which would ultimately dictate what process route you go.
1. Small gas volumes, hence keep away from HP sweetening/membranes/molecular sieves etc. 1st criteria is to consider a process that will have revenue generation to pay back for the cost of the plant.
2. As part of the Guideline 60 Flare Reduction Program in Alberta, we have put together a low cost process for treating sour or sweet gas. Prime market is solution gas and casing gas. Process can accomplish any combination of A. Gas Sweetening B. Dehydration C. Hydrocarbon Dew Point Control. Will produce gas at LHV > 950 Btu/SCF + meet sales gas CO2/H2S specs. 75 psig pressure achieved at IBL without reciprocating or screw compressors. Brand new skidded plant in building would cost about Can$220,000 +/- 5 %. Hence, you can do your calculations for payback.
3. You can not have the best of both worlds. The first objective is to recover the methane and forget about CO2. Our processs will treat the off gas so that you have zero emission of hydrocarbons.
4. This technology will compete against micro-turbines. It will clean up the gas for gas turbines, reciprocating engines, furnaces etc. You do not put a flame to the gas and get 20 % efficincy with a single cycle micro-turbine. You make clean natural gas (LHV and Wobbe number exceed turbine vendor requirements) which is suitable for fired equipment and if the need be, you can compress it and sell it to Novagas, Atco etc.
If you respond, we can continue the discussions. I am currently out of Canada in Belgium and will be on the move to the UK on business next week. Use contact EMail: courtneydehn@canada.com
Courtney Dehn
Process Manager
TG Engineering Inc,
Calgary
Canada