Mixing MDEA, TEA shows benefit for gas-sweetening operations

Wael A. Fouad Abdallah S. Berrouk Cornelis J. Peters Petroleum Institute Abu Dhabi Studies have demonstrated how mixing primary-tertiary or secondary-tertiary amines have improved the efficiency of amine-sweetening processes in terms of gas purification and process energy requirements. This article discusses the use of amine solvents that consist of two tertiary amines, methyl-diethanolamine (MDEA) and triethanolamine (TEA). A kinetic approach was used to explain results obtained from a process simulation of the Habshan gas sweetening unit in Abu Dhabi. Results show that up to a 3% reduction in unit running cost can be obtained with a mixture consisting of 40 wt % MDEA and 5 wt % TEA), wh...

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