www.chemengonline.com November 2024 Cover Story 18 Chemical Recycling is Essential for Plastics Circularity, but Faces Challenges Environmental imperatives drive the development of technologies for the chemical recycling of plastic waste, but significant hurdles - including economic viability, collection logistics and feedstock complexity - need to be addressed effectively for chemical recycling to have a larger impact In the News 5 Chementator A low-cost method for bio-based production of acrylic acid; Frugal method adsorbs and destroys PFAS with photocatalyst; Process for electrolytically converting CO2 to carbon materials to be scaled up; A nearly universal electrolyte chemistry for safer and longer-lasting batteries; Destroy PFAS while also producing syngas; and more 11 Business News BASF completes superabsorbent polymers expansion project in Texas; HIF Global announces e-methanol project in Brazil; DuPont completes expansion of photoresist facility in Japan; Evonik breaks ground on major silica expansion in South Carolina; and more Technical and Practical 16 Facts at your Fingertips Milling for Particle Size Control This one-page reference provides information on the mechanical forces involved in size reduction and materials properties important to equipment selection 22 Feature Report Part 1 Selecting Valves for Hydrogen Service With hydrogen's evolution into an alternative fuel requiring production and storage precision, selecting the right valves has never been more important 26 Feature Report Part 2 Rotary Valves Can Prevent Stem Seal Woes Consider the potential for stem seal leakage when selecting a valve 28 28 Feature Report Investigating Decarbonization Strategies for Steam-Cracker Furnaces Significant sustainability benefits can be gained through optimization in steam-cracking furnaces. The study detailed here shows the specific decarbonization strategies that can help improve energy efficiency and reduce emissions 26 5 18 Volume 131 | no. 11 CHEMICAL ENGINEERING WWW.CHEMENGONLINE.COM NOVEMBER 2024 1http://www.chemengonline.com http://WWW.CHEMENGONLINE.COM