www.chemengonline.com June 2018 Cover Story 42 Photochemical Processes in Stirred-Tank Reactors A general overview of industrial photochemistry and the design of large-scale, stirred-tank photochemical reactors In the News 7 Chementator Highly selective adsorbent tackles complex sulfur species; Harnessing the Joule-Thomson effect; First bio-based FDME pilot plant opens; This wallpaper has built-in fire detection; A platinumfree electrode for making H2 from water; Biologically inspired denitrification catalyst; and more 12 Business News Total and Sonatrach begin engineering studies for joint petrochemicals projects; Jacobs wins services contract for Encina's BTX plant in Wyoming; Eastman plans copolyester capacity expansion; Arkema starts up expanded PVDF unit in Kentucky; and more 14 Newsfront Transformations in Transit: Chemical Logistics Get Smarter Digitalization, sustainability, security and safety are at the forefront of innovations in the logistics and supply-chain sectors of the CPI 18 Newsfront Simplifying Integration of Modular Projects Plug-and-produce concepts for automating modular skids may solve integration challenges Technical and Practical 36 Facts at your Fingertips Seal Material Properties This one-page reference provides information on the major considerations for selecting materials for seals, and the properties of common seal polymers 38 Facts at your Fingertips Pneumatic Conveying Flow Patterns This one-page reference provides information on the factors that affect flow patterns in pneumatic conveying systems 40 Technology Profile Acrylonitrile Production This process description outlines a production route for making acrylonitrile from propylene 58 Feature Report Part 1 Performance Prediction for Industrial Boilers Improved understanding of boiler-performance calculations can allow plant engineers to improve their facility's steam system operation and better engage with boiler-system vendors 67 Feature Report Part 2 Steam Balancing: The First Step in Steam Optimization The ability to achieve an optimal steam balance can help to improve the overall thermal cycle efficiency of any steam-production system CHEMICAL ENGINEERING WWW.CHEMENGONLINE.COM JUNE 2018 1 58 18 14 42 Volume 125 | no. 6http://www.chemengonline.com http://WWW.CHEMENGONLINE.COM