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Displaying 341 - 360 of 899 stories.
August 1, 2011
An alternative desalination process that reduces energy consumption by over 50% compared to best available technology (BAT) has been successfully piloted by the Industry Sector of Siemens AG (Munich, Germany; www.siemens.com), in collaboration with Singapores national water agency, PUB, and Singapores Environment and Water Industry Program (EWI). Results of the Siemens demonstration unit, which has been...
http://www.che.com/chementator/A-step-forward-for-an-energy-saving-desalination-process_8275.html
August 1, 2011
In June, the U.S. Environmental Protection Agency (EPA; Washington, D.C.; www.epa.gov) announced the winners of the 2011 Presidential Green Chemistry Challenge Awards. Winners of the Challenge, which promotes R&D of less hazardous alternatives to existing technologies that reduce or eliminate waste in industrial production, are selected by an independent panel convened by the Americal Chemical Soc...
http://www.che.com/chementator/Green-honors_8278.html
August 1, 2011
The Fine Chemicals Div. of Takasago International Corp. (Takasago; Tokyo, Japan; www.takasago.com) has commercialized a new, highly efficient asymmetric hydrogenation catalyst for producing chiral alcohols — key chemicals for the production of pharmaceuticals, fragrances and agrochemicals. The ruthenium-complex catalyst is tradenamed RUCY after its molecular structure, ruthenabicycle...
http://www.che.com/chementator/Commercial-launch-of-a-new-asymmetric-hydrogenation-catalyst_8279.html
August 1, 2011
The use of solar energy to split water into hydrogen and oxygen is an appealing idea, given that sunlight is abundant in many parts of the world, but one of the challenges to its development is to find a suitable electrode material. Silicon, the popular photovoltaic material, seems like a logical choice, but when it is exposed to O2 it is rapidly...
http://www.che.com/chementator/Silicon-passes-a-test-in-water-splitting_8280.html
August 1, 2011
Last month, BASF SE (Ludwigshafen, Germany; www.basf.com) launched a new crosslinking acrylate monomer, hydroxpropl carbamate acrylate (HPCA), which is said to shorten the processing time for the manufacture of...
http://www.che.com/chementator/A-new-HPCA-monomer_8281.html
August 1, 2011
Forward osmosis (FO) has been recognized as a valuable technology for many applications including wastewater reclamation, seawater desalination, and energy production, due to the low energy input required. The osmotic pressure gradient across a semipermeable FO membrane causes water to diffuse naturally through the membrane, leaving impurities behind. However, when water diffuses through the selective...
http://www.che.com/chementator/A-promising-new-forward-osmosis-membrane_8282.html
August 1, 2011
Practically all of the coal-fired power plants in the U.S. collect ash from the bottoms of their boilers using a wet system — the ash falls into hoppers that are partially filled with water, and once or twice per shift the slurry is pumped to a settling pond or solid-liquid separation tanks (dewatering bins). In a break from that norm, Seminole Electric Cooperative, Inc. is switching its two 650-MW...
http://www.che.com/chementator/U-S-power-plant-goes-dry-for-handling-bottom-ash_8283.html
August 1, 2011
A new anode material with nanostructured interfaces between barium oxide and nickel prevents deactivation by coking in solid-oxide fuel cells (SOFCs) using carbon-containing fuels. The material offers a path to low-cost, low-emission SOFCs that can convert gasified carbon fuels...
http://www.che.com/chementator/Fuel-cell-anode_8287.html
August 1, 2011
A newly introduced cryogenic grinding mill from Air Products and Chemicals Inc. (Allentown, Pa.; www.airproducts.com/ultrafine) can generate consistent yields of particles between 45 and 250 µm, and in some applications can achieve particle sizes of 10 µm. The ultrafine grinding mill also achieves narrower particle size distributions than conventional impact mills. Known as the PolarFit...
http://www.che.com/chementator/Three-mechanism-grinding-mill-achieves-finer-more-uniform-particles_8288.html
August 1, 2011
  Graphene from dry ice Researchers at Northern Illinois University (NIU; DeKalb, Ill.; www.niu.edu) discovered a new method for producing graphene that involves burning pure magnesium metal in dry ice. The method, which is capable of producing large quantities of graphene in sheets less than ten atoms thick, is simpler than conventional methods for generating graphene, and avoids hazardous chemicals...
http://www.che.com/chementator/August-Chementator-Briefs_8289.html
August 1, 2011
The properties of gold nanoparticles could be combined with those of polydimethylsiloxane (PDMS) to provide a sustainable and practical solution for water treatment, according to a team from the Jawaharlal Nehru Center for Advanced Scientific Research (Bangalore, India; www.jncasr.ac.in). The team, headed by professor Giridhar U. Kulkarni, has synthesized low-density, highly compressible, porous foams of...
http://www.che.com/chementator/A-touch-of-gold-makes-a-swell-absorbent-foam_8290.html
August 1, 2011
GE Power & Water (Trevose, Penn.; ge.com) has introduced an improved membrane bioreactor (mbr) technology whose productivity is said to be 15% higher than that of its predecessor for wastewater treatment plants. The new system, called LEAPmbr, was derived from innovations to GE’s ZeeWeed 500 mbr. Glenn Vicevic, senior manager, Engineered Systems, says the system has been tested on a commercial...
http://www.che.com/chementator/This-new-membrane-bioreactor-cuts-energy-costs-and-boosts-throughput_8291.html
August 1, 2011
Almost by definition, chemical engineering is a “green” discipline today, as it so often involves efforts to optimize chemical processes in order to reduce the amount of energy and raw materials that are used and the amount of waste that is generated. Today everybody “talks green” but in a lot of cases engineers are the most qualified people to provide the tools required to make...
http://www.che.com/chementator/air_pollution_control/Practice-Green-Chemical-Engineering_8298.html
July 1, 2011
Grace Davison (Columbia, Md.; www.grace.com) has commercialized a set of catalysts and additives for fluid catalytic cracking (FCC) that contain either zero or low rare-earth metal content. The new product family, known as Replacer, includes new catalysts for processing both hydrotreated and residual-fuel-oil (resid) feed, as well as environmental additives for sulfur treatment. The product family employs...
http://www.che.com/chementator/A-catalyst-line-with-low-or-zero-rare-earth-metals_8162.html
July 1, 2011
Sulfur dioxide emissions from metals smelters and other process plants are typically treated by converting the SO2 to sulfuric acid, but this may not be convenient, because of the shipping cost for plants located far from an acid market. WorleyParsons (Monrovia, Calif.; www.worleyparsons.com) offers a solution to this problem with a process that converts SO2 to elemental sulfur, which is easier and safer...
http://www.che.com/chementator/An-innovative-way-to-recover-elemental-sulfur-from-SO2-emissions_8172.html
July 1, 2011
Researchers from the University of Cantabria (Santander, Spain; www.unican.es) have developed a process for incorporating Waelz slag into ceramic clay construction bricks, offering an alternative for disposal of the industrial byproduct. The engineers replaced between 20 and 30% of clay with slag, and found that the inclusion at that level did not have any significant detrimental effect on the physical...
http://www.che.com/chementator/Waelz-slag-used-in-commercial-ceramic-bricks_8173.html
July 1, 2011
The research group of professor Akihiko Kondo at Kobe University (Kobe City, www2.kobe-u.ac.jp/~akondo/index_English.htm) has developed a one-step, pretreatment process for making bioethanol from cellulose and lignocellulose. The process uses an ionic liquid — which converts cellulose into a gel — and a genetically engineered yeast (arming yeast) that...
http://www.che.com/chementator/This-one-step-route-to-cellulosic-ethanol-features-a-multitasking-yeast_8177.html
July 1, 2011
A process for making polyols from soybean oil and glycerin has been licensed by its developer, Battelle (Columbus, Ohio; www.battelle.org), to Emery Oleochemicals Americas (Cincinnati, Ohio; www.emeryoleo.com), who intends to produce the renewably sourced polyols at prices similar to those of petroleum-based polyols. As multifunctional alcohols, polyols are widely used in industry, especially for making...
http://www.che.com/chementator/Process-for-renewably-sourced-polyols-licensed_8180.html
July 1, 2011
Last month, Corning SAS (Avon, France), a subsidiary of Corning Inc. (Corning, N.Y.; www.corning.com), introduced the Advanced-Flow G4 Ceramic Reactor — the latest addition to the company’s line of glass flow reactors. The G4 is made of sintered-ceramic fluidic modules based on the...
http://www.che.com/chementator/A-glass-flow-reactor-is-now-available-in-ceramic_8193.html
July 1, 2011
  Waste-to-biofuels Valero Energy Corp. (San Antonio, Tex.; www.valero.com) is one of five companies that have invested a total of $60 million in new financing in Enerkem Inc. (Montreal, Que.; www.enerkem.com), which has developed a process to produce liquid fuels and chemicals from municipal solid waste. Valero, the largest independent petroleum refiner in the U.S., has made a number of investments...
http://www.che.com/chementator/July-Chementator-Briefs_8194.html
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