www.chemengonline.com Sptember 2020 Cover Story 26 Electrolyzer Technologies for Green Hydrogen Hydrogen is a cornerstone in the global energy transition and its production via electrolysis has ignited demand for high-performance electrolyzer units In the News 7 Chementator A new approach makes flexible screw pumps; A steam-stable MOF for high-capacity carbon capture; New Japanese project targets CO2 and brine utilization; Upcycled silicon improves LIB energy storage; CoreTec partners with Evonik to produce cyclohexasilane; and more 12 Business News Phillips 66 to transform petroleum refinery into world's largest renewable-fuels plant; OCP to double phosphoric acid production with construction of new plant; Sabic to operate chemical plant on 100% renewable power; and more Technical and Practical 24 Facts at your Fingertips Cost Estimation and Risk This one-page reference provides information on the concepts of project risk, contingency and accuracy in cost estimation 25 Technology Profile Polypropylene Carbonate Production This one-page process summary describes the production of polypropylene carbonate, a thermoplastic co-polymer made from propylene oxide and carbon dioxide 7 32 Feature Report A Holistic Approach for PumpSystem Analytics A step-by-step approach is presented to address the modern requirements of a pump-system digital solution 39 Feature Report Designing an Integrated Wastewater-Treatment System Meeting the wastewatertreatment demands of an integrated manufacturing complex requires a comprehensive design that addresses a diverse array of contaminants and discharge requirements 50 Environmental Manager Process Changes: Understanding and Mitigating Fire- and Life-Safety Risk Factors When making a change in your process, do not overlook new potential hazards that may arise, as discussed here 56 Engineering Practice Liquid Layers: Measuring Overall Level and Interface Points Accurate interface level measurement is crucial to optimizing separation processes. Today's guidedwave radar technologies make it possible to measure thin liquid layers with greater accuracy than ever ChemiCal engineering www.Chemengonline.Com September 2020 1 39 26 Volume 127 | no. 9 50http://www.chemengonline.com http://www.Chemengonline.Com