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Displaying 521 - 540 of 1612 stories.
August 1, 2010
A process that promises a significant reduction in the cost of removing sulfur from coal-derived synthesis gas (syngas) will be tested in a 50-MWe demonstration unit at Tampa (Fla.) Electric Company’s 250-MWe integrated gasification-combined cycle (IGCC) power plant. RTI International (Research Triangle Park, N.C.; www.rti.org), the developer of the technology, has awarded a contract for front-end...
http://www.che.com/extras/pdf/High-temperature-process-cuts-the-cost-of-syngas-cleanup_5874.html
August 1, 2010
A next-generation, carbon-enhanced membrane-bioreactor (MBR) system improves treatment of industrial wastewater with high organic content and containing compounds that resist microbial breakdown. The system allows economic reuse of wastewater or discharge to meet stringent environmental standards. The new MBR, dubbed EcoRight, will be commercially available in early 2011. First envisioned by Saudi Aramco...
http://www.che.com/extras/pdf/Membrane-bioreactor-technology-improves-treatment-of-high-organic-content-water_5875.html
August 1, 2010
Last month, Pittsburgh Iron Oxides, LLC (Pirox; New Brighton, Pa.; www.piroxllc.com) was granted U.S. patent No. 7,744,848 for its process of producing high-purity magnetite (Fe3O4). The company produces synthetic magnetite, tradenamed SuperMagnetite, which has greater than 99% purity and exhibits a unique combination of magnetic properties (such as remnance, saturation and, coercivity) that are derived...
http://www.che.com/extras/pdf/A-new-production-route-to-high-purity-magnetite_5876.html
August 1, 2010
Flyanic LLC (Newark, N.J.; www.flyanic.com) has developed an industrial-scale and economical process for grinding cement, flyash and other cementitious materials to a median particle size of 1 micron, making them suitable for use in concrete and mortar. For example, flyash and slag ground less than 10 microns are highly reactive pozzolans for...
http://www.che.com/extras/pdf/Size-reduction-of-cementitious-material_5877.html
August 1, 2010
The research group of Kazuo Tajima at Kanagawa University (Yokohama, Japan; apchem2.kanagawa-u.ac.jp) have developed a new emulsification process that enables biodiesel fuels (BDFs) to be used without any purification process, thereby reducing production costs by one fourth. Tajima estimates that the process...
http://www.che.com/extras/pdf/Super-emulsion-slashes-biodiesel-production-costs-by-25-percent_5878.html
August 1, 2010
Researchers at the Fraunhofer Institute for Mechanics of Materials (IWM; Halle, Germany; www.fraunhofer.de) have developed ceramic membranes with uniform pore structure and tight pore-size distribution, which makes them more stable and delivers considerably higher...
http://www.che.com/extras/pdf/Nanopores-improving-sterile-filtration_5879.html
August 1, 2010
Strata Technology Ltd. (Sunbury-on-Thames, U.K.; www.stratatec.co.uk) has commercialized the Cambridge Multipass Rheometer (MPR), which was developed by professor Malcolm Mackley at the Dept. of Chemical Engineering and Biotechnology, Cambridge University (www.ceb.cam.ac.uk) for advanced studies of the rheological properties of melts, liquids and soft solids. The device consists of two...
http://www.che.com/extras/pdf/This-rheometer-performs-multipass-measurements_5880.html
August 1, 2010
ADA-ES, Inc. (Littleton, Colo.; www.adaes.com) and Arch Coal, Inc. (St. Louis, Mo.), the U.S.’s second-largest coal producer, have signed an exclusive development and licensing agreement for an ADA-ES process that reduces mercury emissions from coal-fired plants by pretreating the coal. Designed for use with sub-bituminous coals, the process has reduced Hg emissions by up to 80% in full-scale tests...
http://www.che.com/extras/pdf/Control-mercury-emissions-from-coal-fired-plants-without-treating-the-fluegas_5881.html
August 1, 2010
  Graphene Researchers at Rensselaer Polytechnic Institute (RPI; Troy, N.Y.; www.rpi.edu) have developed an inexpensive way to produce large quantities of graphene. Using acid treatment and ultrasound, the method is a step toward mass production of the atom-thick, honeycomb-shaped nanomaterial, which is being studied as a possible replacement for silicon in nanoelectronics. The scientists dissolved...
http://www.che.com/extras/pdf/August-chementator-briefs_5882.html
August 1, 2010
Considering that a large fraction of the synthesis gas (syngas) produced today is made by steam reforming of natural gas, it might seem curious that in some parts of the world, syngas is being converted into substitute natural gas (SNG). Nevertheless, such role reversal is common where coal is abundant and gas is expensive. China, for example, imports most of its gas, either via pipeline from Russia or...
http://www.che.com/extras/pdf/Substitute-natural-gas-deja-vu_5885.html
August 1, 2010
In any given chemical processing facility, there may be literally hundreds of operational environments that require protection from excessive pressure. Both rupture disks and pressure relief valves, or the two used in combination, help protect against damage to equipment and injury to personnel. While the basic technology for either type of mechanism has not changed much in recent years, tweaking the...
http://www.che.com/extras/pdf/Pressure-relief-Oh-What-a-Relief-It-Is!_5886.html
August 1, 2010
Get improved precision in batching and filling applications 3i’s Technologies This company’s Rotary Scalpel technology (photo) can deliver small increments of a wide variety of solid materials with precisions of ±0.5 g. The technology consists of a large inlet area designed for consistent material flow feeding into a rotary feed drum, and a pneumatically controlled “scalpel”...
http://www.che.com/extras/pdf/Get-improved-precision-in-batching-and-filling-applications-_5887.html
August 1, 2010
OVERVIEW Indirect heating of processes by organic thermal-liquid fluids offers highly reliable operation, and the heat transfer systems are generally treated as low-maintenance utilities. Occasionally, the heat transfer fluid can become contaminated, resulting in the formation of sludge particles, or other sources of dirt can infiltrate the system. This contamination can cause operational problems. The...
http://www.che.com/extras/pdf/Heat-Transfer-Fluids-System-Filtration_5888.html
August 1, 2010
My first distillation dream occurred about 30 years ago, and yet, I recall it as vividly as if it were yesterday. In it, my distillation-column design work started with a vapor-liquid thermodynamic model that was widely regarded as perfect. I had operating data from ten similar columns. The feed composition was precisely known, and there were no alternative feedstocks. The overhead specification was easy...
http://www.che.com/extras/pdf/Successful-revamps_5889.html
August 1, 2010
Feeder combines speed with accuracy Hapman The PosiPortion feeder (photo) offers a 2-in-1 feed screw option that dramatically improves batch accuracy without compromising speed. A two-speed delivery scheme, consisting of a fast turning “bulk-mode” and a slower “dribble-mode”, are used to meet batch set points. The system comes with a performance guarantee, and additional equipment...
http://www.che.com/extras/pdf/Focus-on-Feeding-and-Conveying_5893.html
August 1, 2010
The mechanical design and material science of pH-sensor technology have evolved dramatically over the last century. Current-day uses include a wide range of applications from high-purity pharmaceutical processing to wastewater treatment. Some of these applications pose high challenges to pH measurement, including high-temperature and otherwise harsh measuring environments, stability (particularly in...
http://www.che.com/extras/pdf/pH-Measurement-And-Control_5894.html
August 1, 2010
When it comes to managing regulatory documents such as product labels, bills of lading, and certificates of analysis (COA), virtually all manufacturers in the chemical process industries (CPI) face the same challenge — getting the right information into the right document formats for every shipment. This challenge becomes more complicated when you ship to customers with unique labeling and reporting...
http://www.che.com/extras/pdf/Foolproofing-Regulatory-Document-Generation_5895.html
August 1, 2010
Nakata Hertle Moncrief Stefano Glaser Masaaki Nakata joins Malvern Instruments Ltd. (Malvern, U.K.) as regional sales manager for process systems for Japan and the Asia-Pacific region. Engineering and environmental consulting firm GHD (Sydney, Australia) promotes Chris Hertle to global market leader for the water sector. Total Exploration & Production...
http://www.che.com/extras/pdf/Masaaki-Nakata-joins-Malvern-Instruments-_5897.html
August 1, 2010
To unearth the fundamental causes of vibration-related pump troubles, pump end-users and original equipment manufacturers (OEMs) typically have relied on a concise array of vibration field-test parameters. Conventional trial-and-error vibration troubleshooting methods often fail to achieve the longterm, trouble-free pump operation sought, yet they can be time-consuming and increasingly costly to apply...
http://www.che.com/extras/pdf/Fine-tuning-Pump-Vibration-Diagnostics_5899.html
July 1, 2010
Computational Techniques for Multi-Phase Flows. By Guan H. Yeoh and Jiyuan Tu. Butterworth-Heinemann. 30 Corporate Drive, Burlington, MA 01803. Web: elsevierdirect.com. 2009. 664 pages. $130.00. Reviewed by Simon Lo CD-adapco, Didcot, U.K. This guide effectively covers many complex topics associated with computational fluid dynamics (CFD), multiphase flow turbulence, numerical methods and multiphase flows...
http://www.che.com/extras/pdf/CD-adapcos-Lo-reviews-"Computational-Techniques-for-Multi-phase-Flows"_5787.html
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