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Displaying 181 - 200 of 1630 stories.
October 1, 2012
Vacuum conditions for many unit operations — including distillation, evaporation, drying, crystallization, filtration and more — are typically achieved using the following three approaches: • Steam ejector systems • Mechanical vacuum pumps • Integrated vacuum systems (which combine steam ejectors and mechanical vacuum pumps) This article is the second part of a two-part series,1...
http://www.che.com/extras/pdf/Reduce-Hazards-in-Process-Vacuum-Systems_9787.html
October 1, 2012
Increasing production of natural gas from hydraulic fracturing of shale deposits has fundamentally altered the landscape of chemical production in North America. The higher margins on steam-cracking ethane to produce ethylene have resulted in significant feedstock shifts in the U.S. over the past two years. Numerous chemical producers are expanding ethylene capacity to take advantage of the increased...
http://www.che.com/extras/pdf/Shale-Gas-Ushers-In-Ethylene-Feed-shifts_9834.html
September 1, 2012
Reviewed by David Hill, Chemstations Inc., Houston   The authors of this text are leaders in chemical engineering thermodynamics. Based on their status, I recommended this book in a blog entry before even seeing a review copy — and I’m glad I did. The book is aimed at both students and professionals who work with process simulators. It assumes a prior understanding of thermodynamics, and...
http://www.che.com/extras/pdf/Thermodynamics-for-process-simulation-reviewed-by-ChemStations-Hill_9615.html
September 1, 2012
Last month, we ran a letter from reader, Jason Makansi, commenting on our June story, Chemical Engineering Education Evolution ( Chem. Eng., June 2012, pp. 22–25), which highlighted, among other things, the need for a more-meaningful connection between academia and industry. Makansi’s letter was passionate in itself, expressing frustration at the slow pace of progress over the past 30 years or...
http://www.che.com/extras/pdf/Opinions-on-ChE-education_9625.html
September 1, 2012
It was clear at the recent Chemical Sector Security Summit (Baltimore, Md., July 31-Aug. 1) that awareness of and activity in security for the chemical process industries (CPI) are growing. The annual summit, now in its sixth year, was held at its largest venue ever and brought together about 650 participants from industry, academia and the government to network with other security professionals, share...
http://www.che.com/extras/pdf/Chemical-Plant-Security-Gating-more-than-the-perimeter_9655.html
September 1, 2012
Endress+Hauser A flowmeter designed for biogas The Proline Prosonic B200 ultrasonic flowmeter (photo) measures flowrate and methane content of wet biogas, landfill or digester gas, and other types of low-pressure, wet or contaminated gas. The company has optimized transit-time ultrasonic technology for biogas applications. The B200’s body is made from 316L stainless steel and is suitable for wet...
http://www.che.com/extras/pdf/Focus-on-Flowmeters_9659.html
September 1, 2012
Contact agitated dryers are used for drying wet powders, slurries, filter cakes, and applications where off-gases during the drying cycle must be contained. If the applications are also heat-sensitive, such as specialty chemicals, polymers, food products and pharmaceuticals, contact drying must take place at low heating temperatures, at residence times in tune with the tolerance of the product, and...
http://www.che.com/extras/pdf/Thin-Film-Drying-Offers-Deep-Benefits_9680.html
September 1, 2012
Sparging refers to the process of injecting a gas through a diffuser into a liquid phase. It is used in both physical and chemical process applications. In physical process applications, the gas is used to either dissolve gas into liquid (such as aeration and carbonation) or to remove contaminants from the liquid phase (such as oxygen stripping, volatile organic compound stripping and water stripping). In...
http://www.che.com/extras/pdf/Gas-Sparging_9681.html
September 1, 2012
Pumps are among the most commonly used machines in the chemical process industries (CPI). Condition monitoring tests and predictive maintenance can help pump operators determine when to overhaul pumps in a way that minimizes costs. Despite pumps’ ubiquity and large energy demands, however, relatively little information is available on how to apply predictive maintenance approaches and condition...
http://www.che.com/extras/pdf/Condition-Monitoring-Methods-for-Pumps_9682.html
September 1, 2012
Corrections: From the October 2012 Letters page: This original article, which appeared in the print edition of Chemical Engineering (September 2012), had two errors: Equation (19) should read D = log (TH)-0.4, and Table 2 was missing decimal points in all numbers on both the x- and y-axes. The corrections are shown here. Recirculating cooling-water systems are essential parts of many facilities throughout...
http://www.che.com/extras/pdf/Cooling-Water-Outlet-Temperature-Evaluating-The-Best-Maximum-Value_9683.html
September 1, 2012
Nathan Cooper Duckworth Shana'a Matzen John Nathan becomes director of operations for Magnetic Products (Highland, Mich.).   Intellitect Water (Hants, U.K.) makes two appointments: Mark Duckworth becomes engineering manager in product development; Jo Cooper becomes product and market specialist.   CleanTech Biofuels (St. Louis, Mo.) names James E. Russell...
http://www.che.com/extras/pdf/Nathan-becomes-director-of-operations-at-Magnetic-Products-_9684.html
September 1, 2012
This article is the first in a two-part series, in which the types of process vacuum equipment (steam ejector systems and mechanical vacuum pumps) are discussed.1 Emphasis is given on how they are constructed and operate, and how to design associated parts of the systems (such as foundations, suction piping, discharge piping, and so on), to ensure safe operation. Many unit operations — including...
http://www.che.com/extras/pdf/Vacuum-Systems-Recommendations-For-Safe-Operation_9685.html
September 1, 2012
Plant Watch Air Products to build world’s largest energy-from-waste facility in the U.K. August 7, 2012 — Air Products (Lehigh Valley, Pa.; www.airproducts.com) plans to build and operate a renewable energy plant in the U.K. using advanced-gasification energy-from-waste (EfW) technology. The Tees Valley plant, located at the New Energy and Technology Business Park, near Billingham, Teesside, is...
http://www.che.com/extras/pdf/Air-Products-to-build-worlds-largest-energy-from-waste-facility-in-the-U-K-and-more-business-news_9686.html
August 1, 2012
Achema 2012 — the 30th International Exhibition Congress on Chemical Engineering, Environmental Protection and Biotechnology that occurred in late June in Frankfurt am Main, Germany — took a decidedly forward-looking stance, focusing on a set of topics that the chemical process industries (CPI) will have to address in the future, including increased attention on sustainable processes and...
http://www.che.com/extras/pdf/Achema-2012-takes-a-forward-view_9516.html
August 1, 2012
NORTH AMERICA World Class Process Safety Management for Chemicals, Petrochemicals & Refining. T.A. Cook Consultants (Houston). Phone: 919-510-8142; Web: tacook.com/psmusa Houston, Tex. September 18–20   Plastics in Photovoltaics 2012. Applied Market Information LLC (Wyomissing, Pa.). Phone: 610-478-0800; Web: amiplastics.com/events Phoenix, Ariz. September 19–20   Polyurethanes...
http://www.che.com/extras/pdf/Calendar-September-November-2012_9523.html
August 1, 2012
The main function of the expansion tank in a heat-transfer system is to allow space for the heat-transfer fluid to expand as it is heated. A properly designed, installed and maintained expansion tank will support longer fluid and equipment life, safe operation and easier maintenance. Configuration The expansion tank is best located at the highest point in the system to provide a positive pressure head to...
http://www.che.com/extras/pdf/Heat-transfer-expansion-tank-design_9550.html
August 1, 2012
There is a temptation that steam design engineers find difficult to resist — to put condensate from high-pressure (HP) steam mains directly into the low-pressure (LP), pumped condensate-return (CR) mains. After all, the CR main is so convenient — it is generally laid right next to the outgoing steam main in the same tunnel, trench or racks as the CR main returning to the steam plant. And, the...
http://www.che.com/extras/pdf/Waterhammer-In-Condensate-Return-Lines_9551.html
August 1, 2012
Globe-style control valves are in virtually every chemical processing line where pressure and flow must be controlled. And for the most part, they perform as required, day in and day out, requiring little to no thought or attention. In short, control valves are not an everyday topic of discussion. In fact, the globe valve provides a direct contrast to today’s consumer electronics where major changes...
http://www.che.com/extras/pdf/Control-Valves-An-Evolution-In-Design_9553.html
August 1, 2012
Dearth Scott Palucci Cohen Dalvi   Calgon Carbon Corp. (Pittsfield, Pa.) names Randall Dearth as president and CEO and Seth Schofield as independent chairman of the board. Jörg Krüger joins Orion Engineered Carbons (Kingwood, Tex.) as senior vice president of global operations. Russell Scott becomes president of the U.K.-based Institution of Chemical...
http://www.che.com/extras/pdf/Randall-Dearth-becomes-president-and-CEO-of-Calgon-Carbon-_9557.html
August 1, 2012
The earliest application of the fundamental concepts of fluidization dates back to 16th century when a German scientist (Georgius Agricola) described a process to upgrade ores. However, it was not until the 1930s, with the development of the Winkler coal-gasification process, that commercial use of fluidized beds on an industrial scale was recognized. The need for gasoline during the World War II...
http://www.che.com/extras/pdf/A-Primer-on-Gas-Solids-Fluidization_9573.html
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