DECEMBER 2021 | Volume 100 Number 12 HydrocarbonProcessing.com 10 45 SPECIAL FOCUS: CATALYSTS 23 Choosing an FCCU CO promoter is no longer driven by NOx D. Foote, A. Shackleford and A. Vjunov 25 Establish the maximum allowable pressure drop across the catalyst bed structure in a hydrocracker reactor vessel A. Kittur 29 The phosphorus trap is renewed S. A. Robledo PROCESS OPTIMIZATION 31 Using ANN modeling to predict the melt flow index in real time N. C. Chakrabarti and R. Sinha 35 Impact plant performance by improving the steam system J. P. Walter 41 Design and scale-up of gaseous Group A fluid bed systems for chemical synthesis B. Jazayeri HP TOP PROJECT AWARDS 2021 45 Details on high-impact refining and petrochemical projects, as chosen by HP editors and readers ENVIRONMENT AND SAFETY 51 Consequence modeling and risk analysis for safeguarding against jet fires S. Jadeja, N. Haris and A. Selirio 57 Safety and environmental benefits of reliability engineering D. Troyer and C. O'Malley 61 Stack gas scrubbing to meet IMO's 0.5% sulfur bunkering requirement P. Ott and R. H. Weiland 65 Assessment of independent protection layers in an LOPA study-Part 2 H. J. Patel PROCESS CONTROLS, INSTRUMENTATION AND AUTOMATION 68 How one analyzer technology can improve a semi-regenerative catalytic reforming process A. Garza VALVES SHOWCASE 71 Valves market research analysis details industry leaders in valves manufacturing VALVES, PUMPS AND TURBOMACHINERY 73 Aging pressure relief valves: Are you managing history well? J. Younas 75 Practical engineering mitigation actions to prevent vibration during factory tests of SAGD boiler feedwater pumps S. Zardynezhad emissions DEPARTMENTS 4 Industry Perspectives 10 81 Business Trends Advertiser Index 82 Events COLUMNS 7 Editorial Comment HPI spending forecast to reach nearly $490 B in 2022 15 Reliability Disregarding storage preservation has consequences 18 Process Controls, Instrumentation and Automation Improved methods for trace element analysis of challenging petrochemical samples 20 Corrosion Maintaining profitability with opportunity crudes while mitigating naphthenic acid corrosion WEB EXCLUSIVE People Cover Image: The Suhar Refinery Improvement Project, Oman. Picture courtesy of Petrofac. GAS PROCESSING SUPPLEMENT GP-1 Technology and Business Information for the Global Gas Processing Industryhttp://www.HydrocarbonProcessing.com http://www.hydrocarbonprocessing.com