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Archives :: Processing & Handling :: Reaction Engineering

Displaying 241 - 260 of 329 stories.
February 1, 2007
Haldor Topsøe A/S (Lyngby, Denmark; edlinks.che.com/6892-531) has relaunched a methanation process, called TREMP, which makes synthetic natural gas (SNG) from synthesis gas (syngas) mixtures derived from coal gasification. The process was developed and extensively tested during the 1970s, when energy costs were expected to increase to previously unseen levels. When this did not happen, interest in...
http://www.che.com/processing_and_handling/reaction_engineering/catalysis/Making-natural-gas-from-coal_3198.html
February 1, 2007
Conventional fluid-catalytic-cracking (FCC) catalysts are based on USY-type of zeolites (having a pore size of about 7.6 Å), which selectively decompose longer-chained hydrocarbons (HCs) into smaller HCs, gasoline components, light and heavy cycle oils and other products. ZSM-type zeolites have been used recently as additives because the smaller pore size (5.5 Å) allows the...
http://www.che.com/processing_and_handling/reaction_engineering/catalysis/This-modified-catalyst-additive-improves-the-yield-and-quality-from-FCC-units_3201.html
February 1, 2007
Nippon Oil Corp. (Tokyo, Japan; edlinks.che.com/6892-538) has completed a confirmation test of a magnetic-separation process that selectively removes spent FCC (fluid-catalytic-cracking) catalysts from actives ones. The process runs continuously and requires no shutdown of the FCC unit; normally, FCC catalysts have to be replaced periodically, which sometimes requires interruption of the FCC operation. The...
http://www.che.com/processing_and_handling/reaction_engineering/catalysis/Continuously-replace-spent-FCC-catalyst-with-this-magnetic-separator_3204.html
February 1, 2007
Mascoma Corp. (Cambridge, Mass.; edlinks.che.com/6892-541) has received a $14.8-million award from the New York State Dept. of Agriculture and Markets and the New York State Energy Research and Development...
http://www.che.com/processing_and_handling/reaction_engineering/biochemistry/Cellulosic-bioethanol_3206.html
February 1, 2007
Advanced Excelsior Co. (Houston, Tex.; edlinks.che.com/6892-545) has launched Bio-Bubble, claimed to be the world’s first 100%...
http://www.che.com/processing_and_handling/reaction_engineering/biochemistry/Degradable-bubblepack_3209.html
January 1, 2007
    Predicting an adiabatic-temperature rise is useful to chemical engineers for a number of purposes. One use is with combustion reactions whereby it is useful for determining the adiabatic-flame temperature. The adiabatic-temperature rise can be calculated for any reaction of interest, and thus it is often useful in the analysis and design of reactors. The adiabatic-temperature rise is also...
http://www.che.com/processing_and_handling/reaction_engineering/Adiabatic-Temperature-Rise-An-Awkward-Calculation-Made-Simple_3127.html
January 1, 2007
Exelus, Inc. (see also story on p. 11) has demonstrated a process that makes styrene monomer (SM) by the side-chain alkylation of toluene with methanol — an energy-neutral process — instead of the conventional dehydrogenation-of-ethylbenzene route, which is energy-intensive and also a major contributer to methane emissions. The change of feedstocks alone can yield...
http://www.che.com/processing_and_handling/reaction_engineering/Step-out-technology-makes-SM-with-less-energy-and-greenhouse-gas-emission_3187.html
January 1, 2007
Researchers from the Laboratory for Sustainable Technology, School of Chemical and Biomolecular Engineering, University of Sydney (Australia; edlinks.che.com/6891-538) have produced spiral and straight carbon nanotubes (CNTs) in a fluidized bed (FB) by adjusting the synthesis temperature, catalyst compostion, and carbon source. The process has the potential to produce large quantities of high-quality CNTs...
http://www.che.com/processing_and_handling/reaction_engineering/A-process-makes-possible-the-large-scale-synthesis-of-carbon-nanomaterials_3189.html
January 1, 2007
Exelus Inc. (Livingston, N.J.; edlinks.che.com/6891-533) has demonstrated the performance of its ExSact solid-acid alkylation process, having achieved over 1,000 hours of pilot-plant operation on an untreated MTBE raffinate feedstock. The pilot-plant testing was performed to prove the robustness of the ExSact catalyst to common feedstock poisons, such as oxygenates, diolefins and nitriles, to furnish the...
http://www.che.com/processing_and_handling/reaction_engineering/A-milestone-for-a-new-solid-acid-alkylation-process_3190.html
January 1, 2007
With the aim to commercialize a new process for making solar-cell grade (SOG) silicon, Chisso Corp. (Tokyo, Japan; edlinks.che.com/6891-534) is negotiating the possibility of establishing a joint-venture company with Nippon Mining Holdings, Inc. (Tokyo) and Toho Titanium Co., Ltd. (Chigasaki, both Japan). Chisso plants to begin conformation tests of the process this year. The Chisso SOG-Si (CSS)...
http://www.che.com/processing_and_handling/reaction_engineering/An-improved-production-process-for-solar-cell-Si_3191.html
January 1, 2007
Datang International Power Generation Co. Ltd. and Shenhua Ningxia Coal Industry Group (SNCG; both China) have awarded a contract in excess of €100 million to Lurgi AG (Frankfurt, Germany...
http://www.che.com/processing_and_handling/reaction_engineering/Coal-to-plastics_3192.html
January 1, 2007
Last month, after just two years, Maaike Kroon completed her Ph.D. from the Technical University of Delft (Netherlands; edlinks.che.com/6891-544) for developing a sustainable and inexpensive production process that enables reaction and separation operations to be performed in the same vessel. The process takes advantage of the unique properties of ionic liquids (ILs) and supercritical carbon dioxide by...
http://www.che.com/processing_and_handling/reaction_engineering/Green-chemistry_3195.html
January 1, 2007
Up to now, light-cycle oil (LCO) produced from desulfurized vacuum-gas oil has been used as a base for heavy oil or for blending with straight gas oil (SGO). But a decreasing demand for heavy oil, combined with LCO’s drawbacks as a blending material (such as low cetane number), is drying up these outlets for LCO. Furthermore, existing technology for hydrotreating LCO is energy intensive and consumes...
http://www.che.com/processing_and_handling/reaction_engineering/catalysis/A-more-economical-process-for-hydrotreating-light-cycle-oil_3186.html
January 1, 2007
For a biological denitrification process that selectively converts ammonia into nitrogen gas, Paques B.V. (Balk, Netherlands; edlinks.che.com/6891-536) was among the winners of the EEP environmental award, which was presented at Pollutec 2006 (Lyon, France; 28 November–December 1). Developed in collaboration with Delft University of Technology and the University of Nijmegen (both Netherlands), the...
http://www.che.com/processing_and_handling/reaction_engineering/biochemistry/Red-microbes-make-a-meal-from-ammonia_3185.html
December 1, 2006
Up to now, carbon nanotubes (CNTs) have been produced from hydrocarbons in large, high-temperature furnaces operating in an inert-gas atmosphere. A simpler system that requires only a liquid reagent instead of multiple gas cylinders, has been commercialized by Microphase Co., Ltd. (Tsukuba, Japan...
http://www.che.com/processing_and_handling/reaction_engineering/Make-your-own-batch-of-CNTs-with-this-system_3045.html
December 1, 2006
A medium-temperature pyrolysis process that coproduces coal-tar oil and an upgraded coal-char fuel from low-rank coals is being developed by Convert Coal, Inc. (CCI, Mission Viejo, Calif.; edlinks.che.com/6519-532). The SynCrude-Syncoal (SC2) process was described by CCI president Ebbe Skov at the recent Symposium on Western Fuels in Denver, Colorado. The process is applicable to most low-sulfur, low-rank...
http://www.che.com/processing_and_handling/reaction_engineering/Coal-pyrolysis-process-yields-oil-plus-clean-coal_3046.html
December 1, 2006
Excelsyn Molecular Development (Holywell, U.K.; edlinks.che.com/6519-541) has made a “major” advance in its development of improved technology to produce the unnatural amino acid tert-L-leucine (tert-butyl glycine; TBG) — a precursor for synthesizing...
http://www.che.com/processing_and_handling/reaction_engineering/A-natural-way-to-make-an-unnatural-acid_3052.html
December 1, 2006
Eastman Chemical Co. (Kingsport, Tenn.; edlinks.che.com/6519-549) has launched its next-generation PET (polyethylene terephthalate) resin, tradenamed ParaStar, which...
http://www.che.com/processing_and_handling/reaction_engineering/A-new-PET-resin_3058.html
December 1, 2006
An innovative design of a pulsed-electric-field (PEF) treatment unit for the inactivation of Escherichia coli bacteria has been developed by associate professor Mohammed Farid and Sally Alkhafaji at the Chemical and Materials Engineering Department of the School of Engineering, the University of Auckland, New Zealand; edlinks.che.com/6519-542). The system includes multipass PEF treatment chambers that were...
http://www.che.com/processing_and_handling/reaction_engineering/biochemistry/Use-electric-fields-to-pasteurize-foodstuffs_3053.html
December 1, 2006
Mascoma Corp. (Cambridge, Mass.; edlinks.che.com/6519-547) has raised $30 million in its second round of Venture funding — led by General Catalyst Partners (Cambridge, Mass.) — to further develop a new way to make bioethanol from cellulose. Mascoma aims...
http://www.che.com/processing_and_handling/reaction_engineering/biochemistry/Cellulosic-bioethanol_3055.html
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