PTQ Q2 2023 Issue

All operators aspire to achieve longevity of catalyst ser- vice. With this information, it is possible, through analy- sis of the operation, to recognise an acceptable decline in catalyst activity vs a more severe decline. Modelling with appropriate ageing and poisoning factors provides the opportunity to use the knowledge presented by the model to decide whether to remove the poison or plan for catalyst replacement. With all elements considered, the model lends itself to analysing and predicting the performance and useful life of a reactor based on comparison between simulated and actual temperature profiles, especially over time. Designers now have a tool to specify reactors better, and operators can better quantify what is occurring instead of only simu- lating ideal operations. Improved operation and designs can reduce sulphur emissions, improving quality of life.

dustrial Practice , Alberta Sulphur Research Ltd., Calgary, Alberta. 4 Argyle, Morris D., Bartholomew, Calvin H., Heterogeneous Catalyst Deactivation and Regeneration: A Review; Catalyst 2015. Michael A Huffmaster consults to industry on sulphur recovery, treat- ing, gas processing, advanced control, and CO 2 capture, and has con- tributed to numerous publications and presentations on these topics. His career includes 17 years as a consultant after 36 years with Shell. He holds a BSc degree in chemical engineering, and is a registered P.E. in Texas. Prashanth Chandran is Software Development Team Lead at Opti - mized Gas Treating, Inc. He holds a B.Tech in chemical engineering from Anna University, India and an MS in chemical engineering from Oklahoma State University. Nathan A Hatcher served as Vice-President, Technology Develop - ment for OGT from 2009. For most of his career, he has been involved with some facet of gas treating and sulphur recovery. He holds a BS in chemical engineering from the University of Kansas, is a registered professional engineer in the state of Kansas, and currently a member of the industry Amine Best Practices Group. Daryl Jensen is a Development Engineer at OGT, experienced in de - sign/development, simulation, basic engineering design package proj- ect execution, process control design, and on-site start-up/trouble- shooting. He holds BS and MS degrees in electrical engineering from New Mexico State University and is a registered professional engineer in Texas. Ralph H Welland formed Optimized Gas Treating in 1992. He was OGT’s original President and now serves as Chairman. He holds BASc, MASc, and PhD degrees in chemical engineering from the University of Toronto, and was a post-doctoral fellow in applied mathematics at the University of Western Australia. Email: ralph.weiland@ogtrt.com

ProTreat and SulphurPro are marks of Optimized Gas Treating, Inc.

References 1 Huffmaster, M., Stone, F., Massey, S., SCOT Catalyst Longevity – How Much Longer Can You Last – Puget Sound Refinery SCOT Cata - lyst Activity Tracking and Forecast , Laurence Reid Gas Conditioning Conference, Norman. OK, 2005. 2 Huffmaster, M., Maldonado, F., Time and Temperature Effects on Tail Gas Catalyst Performance , Brimstone Sulphur Symposium, Vail, CO, 2013, and Sulphur, 2014. 3 Clark, P. D., Dowling, N. I., Huang, M., Reaction Pathways for Claus Tail Gas Reduction Catalysts: Relevance to Field Operations and In-

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PTQ Q2 2023