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Displaying 541 - 560 of 1625 stories.
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
July 1, 2010
The Industrial Technology Research Institute of Taiwan (ITRI, www.itri.org.tw) is conducting a 10-m3/d pilot-plant project to test the performance of its A2O membrane system for municipal wastewater treatment. The project, which is nearing completion, has already supplied important data, including capital cost, running cost and amount of waste sludge produced. ITRI is conducting negotiations with the...
http://www.che.com/extras/pdf/This-compact-wastewater-treatment-system-reduces-sludge-volumes-and-recovers-biogas_5788.html
July 1, 2010
This Fall, Vantec Co. (Tochigi Prefecture, Japan; www.vantec-jp.com) plans to commercialize a water electrolyzer that incorporates electrodes with a ten-year lifetime — nearly twice that of conventional technology, says the manufacturer. The long-lasting electrodes are expected to reduce the cost of splitting water into hydrogen and oxygen by...
http://www.che.com/extras/pdf/A-hydrogen-generator-featuring-longer-lasting-electrodes_5789.html
July 1, 2010
Nippon Steel Corp. (Tokyo; www.nsc.co.jp) and Kobe Steel, Ltd. (Kobe, Japan; www.kobelco.com) plan to begin construction of a plant to recycle steel-mill dust — a byproduct from the steelmaking process — into direct reduced iron (DRI). The two companies will use steel-mill dust and iron-ore fines from their steel mills as raw materials to recycle the iron from the waste materials into DRI and...
http://www.che.com/extras/pdf/Japanese-JV-to-recycle-steel-mill-dust_5790.html
July 1, 2010
Professor Keiichi Tomishige and colleagues at Tohoku University (Sendai City, Japan; www.che.tohoku.ac.jp/~erec/) have developed a high-performance catalyst for synthesizing 1,3-propanediol (PDO) — a raw material for highly functional poly(trimethyleneteraphthalate) (PPT) fibers — from glycerin as starting material. The catalyst —...
http://www.che.com/extras/pdf/A-new-catalyst-for-the-direct-hydrogenolysis-of-glycerin-into-PDO_5791.html
July 1, 2010
Liquid copper is employed to gasify wastes in a process being developed by Ze-gen (Boston, Mass.; www.ze-gen.com) and will be tested in a small commercial plant in an industrial park in Attleboro, Mass. Scheduled for completion late next year, the plant will convert 150 ton/d of ground wood waste into synthesis gas (syngas). The gas will generate 7 MWth of energy for use by the park, either as electricity...
http://www.che.com/extras/pdf/Novel-gasifier-uses-liquid-copper-as-the-heat-source_5792.html
July 1, 2010
Last month, RWE Power (Cologne, Germany; www.rwe.com) and Linde-KCA-Dresden GmbH (www.linde-kca.com), a subsidiary of The Linde Group (Munich, Germany; www.linde.com), signed a framework agreement on the use of RWE’s WTA technology — a German acronym for fluidized-bed (FB) drying with internal waste-heat utilization. The agreement makes Linde-KCA-Dresden a provider and supplier of WTA. The...
http://www.che.com/extras/pdf/This-lignite-drying-process-increases-the-efficiency-of-power-and-gasification-plants_5793.html
July 1, 2010
A novel catalyst designed by scientists at the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley, Calif.; www.lbl.gov) and the University of California at Berkeley (www.berkeley.edu) has shown the ability to catalyze the electrolysis of water into hydrogen and oxygen, and is 70 times cheaper than platinum ($2,000/oz.), which has also been used to catalyze the reaction. In a...
http://www.che.com/extras/pdf/Molybdenum-oxo-catalyst-offers-cheap-route-to-H2-from-water_5794.html
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