www.chemengonline.com March 2017 Cover Story 42 Control Engineering for Chemical Engineers Chemical engineers who are aware of process control requirements and challenges are in a position to improve process designs In the News 7 Chementator Single-step production of high-purity silicon demonstrated; Making bio-ethanol from cassava pulp; Spinning miles of synthetic spider silk; This project aims for high-efficiency enzyme production; A new filter mesh with reduced erosion - by design; and more 13 Business News AkzoNobel announces startup of bio-steam facility at Delfzijl plant; Chandra Asri selects Unipol PE process technology for new polyethylene plant; Veolia to build iron-removal watertreatment plant in Senegal; and more 15 Newsfront Refrigerants: New Rules Reinforce Innovation As new regulations take effect, familiar refrigerants are being phased out, introducing a variety of next-generation materials and processes to make them 20 Newsfront Building a Better Burner Burner manufacturers provide low-NOx equipment that meets both emissions and performance goals Technical and Practical 38 Facts at your Fingertips Fermentation This one-page reference provides information on a host of potential advantages for using fermentation-based processes to manufacture chemicals, as well as some of the unique challenges associated with fermentation 40 Technology Profile Sulfuric Acid Production from Elemental Sulfur This process description outlines a method for making sulfuric acid via a double-contact process 51 Feature Report Part 1 Beyond Basic Eye Safety How to protect, preserve and enhance workers' safety 56 Feature Report Part 2 How to Avoid Fogging in Protective Eyewear A look at the hidden dangers of lens fogging and how to prevent them 69 69 Solids Processing Particle Impact Problems in Pneumatic Conveying Pneumatically conveyed solid materials inevitably impact pipe walls and other particles, which can create processing and equipment problems. Provided here is an outline of potential problems related to particle impacts and the physics behind them 77 Engineering Practice Designing Atmospheric Storage Tanks Insights into the basics of process design of atmospheric storage tanks and an example of how to prepare a process datasheet are presented here CHEMICAL ENGINEERING WWW.CHEMENGONLINE.COM MARCH 2017 1 56 51 Volume 124 | no. 3 42http://www.chemengonline.com http://WWW.CHEMENGONLINE.COM