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Displaying 341 - 360 of 804 stories.
March 15, 2008
Although nanoporous silica membranes are promising systems for the molecular separation of gases and liquids, they lack microstructural stability in the presence of water at temperatures as low as 60°C. Prolonged exposure to water causes hydrolysis, resulting in the formation of large, non-selective pores and cracks in the membrane. On the other hand, polymeric membranes are less prone to damage by...
http://www.che.com/news/Chementator-A-promising-nanosieve-for-dehydrating-solvents-and-biofuels_3739.html
March 15, 2008
Ateam of researchers at the U.S. Department of Energy’s Argonne National Laboratory (ANL, Argonne, Ill.; edlinks.che.com/7370-568) has developed a membrane capable of producing olefins from alkanes, and reducing wasted energy and pollutants while improving selectivity and yield. Steam cracking, or pyrolysis, has long been the widespread production method for olefins including ethylene, propylene, and...
http://www.che.com/news/Chementator-Ceramic-ethane-to-ethylene-membrane-could-replace-pyrolysis_3740.html
March 15, 2008
Flowserve Corp. (Dallas, Tex.; edlinks.che.com/7370-569) has introduced a new noise-attenuating valve-trim for gaseous applications, one that simultaneously lowers the device’s manufacturing costs while improving its noise reduction capabilities. Like prior noise-attenuation trim, Flowserve’s Valtek Stealth is designed to reduce the velocity at the vena contracta (the point in a fluid stream...
http://www.che.com/news/Chementator-This-valve-trim-combines-multiple-noise-control-mechanisms_3741.html
March 15, 2008
The behavior of many different phenomena can be modeled by systems of ordinary differential equations (ODEs), but most ODEs cannot be solved analytically, in which case an approximation to the solution is found by applying numerical integration methods. Dutch-sponsored mathematician Valeriu Savcenco has developed new "multirate" numerical methods that can significantly reduce the CPU time and...
http://www.che.com/news/Chementator-New-methods-for-solving-differential-equations_3742.html
March 15, 2008
Alstom Power, Inc. (Windsor, Conn.; edlinks.che.com/7370-571) and The Dow Chemical Co. (Midland, Mich.; edlinks.che.com/7370-572) have established a joint development and...
http://www.che.com/news/Chementator-Amine-scrubbing_3743.html
March 15, 2008
Scientists at the Science and Technology Facilities Council (STFC) Rutherford Appleton Laboratory (Chilton, Didcot, U.K.; edlinks.che.com/7370-573) have developed a laser-based method for the characterization of the bulk-chemical content of pharmaceutical capsules — without opening the capsules. In...
http://www.che.com/news/Chementator-Non-invasive-detector_3744.html
March 15, 2008
Researchers at the Fraunhofer Institute for Solar Energy Systems (ISE; Freiburg, Germany; edlinks.che.com/7370-575) have developed a solar-cell prototype that is semi-transparent, color-tunable and (thus far) resistant to weather degradation. A "classical Grätzel cell" according to Andreas Gombert head of Fraunhofer’s Materials Research and Applied Optics department, the prototype is...
http://www.che.com/news/Chementator-Gratzel-cell_3745.html
March 15, 2008
Scientists from the Center Biology at University College Dublin (Ireland; edlinks.che.com/7370-576) and the University of Bologna (Italy; edlinks.che.com/7370-577) have developed an enzymatic process that can be applied to the synthesis of...
http://www.che.com/news/Chementator-Chiral-synthesis_3746.html
March 15, 2008
Rohm and Haas Co. (Philadelphia, Pa.; edlinks.che.com/7370-578)and Novasep (Nancy, France; edlinks.che.com/7370-579) are forming an exclusive alliance to market and sell...
http://www.che.com/news/Chementator-Purifying-glycerol_3747.html
March 15, 2008
SulphCo, Inc. (Houston, Tex.; edlinks.che.com/7370-580) has signed an agreement with Pt. Isis Megah (Isis; an Indonesian oil-and-gas services company), which grants Isis an exclusive...
http://www.che.com/news/Chementator-Sonocracking_3748.html
March 15, 2008
Henkel KGaA (Düsseldorf, Germany; edlinks.che.com/7370-581) has developed a new generation of plasticizer-free dispersion adhesives called Adhesin A 78 — a copolymer system whose formulation...
http://www.che.com/news/Chementator-Phthalate-free-glue_3749.html
March 7, 2008
Terracon Lenexa, Kansas Where to Begin? Last month’s column focused on the importance of health and safety compliance and the all the resources that were available to help businesses, particularly small ones, meet their obligations to keep their workers safe. Compliance begins with commitment and a health and safety program tailored to fit the company, to blend with its unique operations and culture...
http://www.che.com/news/Developing-A-Health-and-Safety-Program_3711.html
February 15, 2008
Asset management means different things to different people in the chemical process industries (CPI). Some take a holistic view in which equipment operations and maintenance, planning and scheduling and all other processing procedures fall under the asset management umbrella. Others focus solely on physical equipment and assets. To make it more diverse, asset management needs differ according to facility...
http://www.che.com/news/Newsfront-Making-the-Most-of-What-Youve-Got_3674.html
February 15, 2008
Hitachi Zosen Corp. (Hitz; Tokyo, Japan; edlinks.che.com/7369-531) is commercializing a new membrane for a hybrid-distillation system (HDS) that is especially suitable for dehydrating ethanol and isopropanol. The HDS can produce 99.7 vol.% ethanol from ethanol-water mixtures with 10 vol.% H2O at a dehydration rate of 50 kg/m2/h/atm (at 130°C), which is more than two times higher than conventional...
http://www.che.com/news/Chementator-New-ceramic-membrane-system-doubles-rate-and-slashes-cost-for-dehydrating-ethanol_3682.html
February 15, 2008
Daihatsu Motor Co., Ltd. (Osaka, Japan; edlinks.che.com/7369-532) has designed a fuel cell for powering automobiles, using nickel and cobalt for the electrodes (instead of conventional platinum and carbon), and hydrazine hydrate (N 2H4. H2O) as its fuel (instead of hydrogen). Although hydrazine is a hazardous material, the company says the hazard level is about the same as gasoline. And unlike H2, which...
http://www.che.com/news/Chementator-This-platinum-free-fuel-cell-runs-on-hydrazine_3683.html
February 15, 2008
Last month, Benefuel, Inc. (Mt. Prospect, Ill.; edlinks.che.com/7369-533) established an exclusive global agreement with Süd-Chemie India Pvt. Ltd. (SCIL; New Delhi) whereby SCIL will manufacture proprietary solid-acid catalysts for Benefuel’s biodiesel production facilities around the world. The patent-pending catalysts — developed by Benefuel in collaboration with the National Chemical...
http://www.che.com/news/Chementator-Commercial-production-and-debut-of-a-new-solid-acid-catalyst-for-making-biodiesel_3684.html
February 15, 2008
Johnson ElectroMechanical Systems, Inc. (Atlanta, Ga.; edlinks.che.com/7369-536) in conjunction with professor Heshmat Aglan of Tuskegee University (Tuskegee, Ala.; edlinks.che.com/7369-537) has received a $75,000 grant from the U.S. Dept. of Energy (DOE; Washington, D.C.) to further develop the firm’s solid-state heat engine technology. The device operates like a fuel cell to generate electricity by...
http://www.che.com/news/Chementator-New-solid-state-heat-engine-cycles-H-2-through-MEA-like-a-fuel-cell_3686.html
February 15, 2008
Biotechnology samples, such as proteins, nucleic acids, biological specimens and pharmaceuticals, are typically stored frozen to extend their shelf life. However, a problem that has plagued researchers for decades is that the buffers used to maintain the pH of the samples lose their efficacy as samples are cooled. Low-temperature biophysical and bioanalytical techniques can also be affected by pH...
http://www.che.com/news/Chementator-Maintain-pH-even-at-cyrogenic-temperatures-with-this-buffer_3687.html
February 15, 2008
Airborne contaminants can be identified within 2 – 3 s with a new sensor developed by researchers at the University of California-Santa Barbara and Stanford University (Calif.). The researchers have founded a company, SpectraFluidics, Inc. (Santa Barbara; edlinks.che.com/7369-539) to commercialize the detector. The instrument employs free-surface microfluidics to absorb molecules directly...
http://www.che.com/news/Chementator-Sensor-uses-microfluidics-to-sniff-for-airborne-contaminants_3688.html
February 15, 2008
A team of researchers from MIT’s (Cambridge, Mass.; edlinks.che.com/7369-540) chemical and mechanical engineering departments, in association with the U.S. Air Force Research Laboratory (Edwards Air Force Base, Calif.), has developed oil-repellent surfaces with likely separations and safety applications for the chemical process industries. Due to the high-surface-tension of water (γlv = 72.1...
http://www.che.com/news/Chementator-Super-oleophobic-materials-promise-revolutionary-membranes_3689.html
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