www.chemengonline.com April 2021 Cover Story 28 Improve Energy Efficiency Using Expanders Expanders can take advantage of pressure reductions to drive rotating machines. Information on how to assess the potential benefits of installing expanders is provided here In the News 5 Chementator Thermal-energy storage system can decarbonize industrial heat; Engineering catalysts with ALD; Methane-pyrolysis leverages natural gas for CO2-free H2 generation; New crushing station makes commercial debut in Brazil; and more 10 Business News Thermo Fisher Scientific plans $600-million bioprocessing expansion; Hexion to expand Portland manufacturing plant; Dow to establish South China Specialties Hub; and more 12 Newsfront Cybersecurity: Continuous Vigilance Required As digitalization becomes more common and remote operations have become necessary, guarding against cybersecurity breaches grows even more critical Technical and Practical 24 Facts at your Fingertips Microbially Influenced Corrosion This one-page reference provides information on the role of microbes in metal corrosion and the importance of biofilms 26 Technology Profile Suspension Polymerization of Polyvinyl Chloride This one-page summary describes the production of polyvinyl chloride 40 40 Feature Report Part 1 Controlling Air Pollution with Ceramic Catalytic Filters Catalyst-impregnated ceramic filter elements can achieve simultaneous removal of multiple air-pollutant species in a modular, space-saving layout 46 Feature Report Part 2 Addressing Problems in Filtration Processes Careful attention to even the smallest details will help to prevent operational problems in filtration processes 50 Solids Processing Operational Best Practices for Rotary Dryers To maximize the service life and reliability of rotary dryers for solid materials, adhere to this set of practices CHEMICAL ENGINEERING WWW.CHEMENGONLINE.COM APRIL 2021 1 46 12 28 Volume 128 | no. 4http://www.chemengonline.com http://WWW.CHEMENGONLINE.COM