January 2011

Special Report: Gas Processing Developments

Use online analyzers for successful monitoring

Improved analytics measure moisture and dew points for natural gas components

Benton, A., Michell Instruments Ltd.; Valiz, C., PDVSA

Using advanced online water and hydrocarbon dew-point analysis techniques is critical to the efficient and reliable operation of natural gas liquid-extraction processes, producing valuable light alkane liquids while the remaining gas is suitable for sales distribution. At its San Joaquin facility, Petróleos de Venezuela, S.A. (PDVSA) initially processed raw wellhead natural gas by separating residual hydrocarbon (HC) condensates, followed by glycol dehydration to reduce the water dew point. Reduced temperature separation was used to decrease the HC dew point prior to molecular sieve dehydration. This provided feed gas with moisture controlled to trace levels into the primary liquid-extr

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