Contaminants key to refinery offgas treatment unit design

This article details methods for removing individual contaminants in refinery offgas (ROG). Various configurations of the ROG treatment unit and associated units are compared, depending on the type of product and feedstock. This article also discusses optimization strategies required for design of ROG treatment units.ROG is produced in refinery units such as hydrotreaters, alkylation units, FCCs, and catalytic reformers, that manufacture conversion products. Refiners can recover valuable products including hydrogen, olefins, NGLs, and higher-btu fuel gas from the offgas if an ROG unit is installed. Incremental economics of product recovery as opposed to using the entire offgas for fuel pr...

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