February 2009

Special Report: Clean Fuels

Measuring total hydrocarbon and H2S in amine acid gas streams

Gas analyzer uses both ultraviolet and infrared spectroscopy

Harris, K., Hauer, R., AMETEK Process Instruments

A mine gas treating, or sweetening, is a process using amine solutions to remove acid gases [hydrogen sulfide (H2S) and carbon dioxide (CO2)] from hydrocarbon (HC) gas in refineries and gas plants. Once the acid gases have been removed, they are further treated in a Claus sulfur recovery unit (SRU). The perfect process would completely separate acid gases from the HCs. The treated gas would not contain acid gases and the gas sent to the SRU would have no HCs. Unfortunately, HCs do end up in the acid gas, creating SRU operating issues including unstable off-ratio operation and reduction in catalyst activity. The unstable operation can reduce efficiency and potentially damage downstream equipm

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