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What is minimum H2S level maintain in UOP naphtha hydrotreating reactor recycle gas? why naphtha hydrotreating reactor can not purge at what temp?
 
Answers
16/10/2018 A: Dipankar Phukan, Indian Oil Corporation, dipankarphukan79@yahoo.com
500 ppm is what I know, but not very sure. We have a wax hydrotreating unit where feed Sulphur is 50 ppm and we need to inject DMDS to keep the catalyst in Sulphided form.
09/10/2018 A: Virendra Kapoor, Petroleum Refining Consultants, vkkapoor9@yahoo.com
The value is specified by catalyst supplier. It is necessary to keep catalyst active in sulfided state. At lower values sulfur from catalyst is depleted by hydrogen.