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Archives :: Processing & Handling :: Separation (Liquid-Liquid & Gas-Liquid) :: Membranes

Displaying 41 - 57 of 57 stories.
March 15, 2008
Ateam of researchers at the U.S. Department of Energy’s Argonne National Laboratory (ANL, Argonne, Ill.; 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...
February 15, 2008
Hitachi Zosen Corp. (Hitz; Tokyo, Japan; 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...
February 15, 2008
Transfield Services Ltd. ( and WorleyParsons Ltd. (both North Sydney, Australia; have been selected to construct two mobile-desalination units (MDU) for contingency use in the Brisbane River. The project is expected to provide 100-million...
December 15, 2007
Ethanol production is an energy-intensive process in which about 50% of the cost is for distillation and dehydration of the ethanol. A membrane system that does the same job, but reduces the energy consumption by up to 50%, has been developed by Vaperma Inc. (St-Romuald, Quebec; Canada; The method was described by Christian Roy, vice-president, business development, at the Annual...
December 15, 2007
A plastic membrane that allows CO2 and other small molecules to move through its pores while largely preventing the movement of larger molecules like CH4, has been developed by a team of researchers from CSIRO Materials Science and Engineering and the Water for a Healthy Country Flagship (Melbourne, Australia;; the Center for Energy and Environmental Resources, the Department of...
November 15, 2007
Within five years, four large power plants in Europe will be outfitted — for testing at the pilot scale — with energy-efficient CO2-filtering membranes that are being developed at the Norwegian University of Science and Technology (NTNU; Trondheim; Professor May-Britt Hägg, head of the membrane research group (MEMFO) at NTNU’s chemical engineering...
September 1, 2007
Hollow-fiber membrane tubes that are selectively permeable to oxygen have been constructed by researchers from the School of Chemical Engineering and Advanced Materials at Newcastle University (, in collaboration with the Chemical Engineering Dept. at Imperial College London...
September 1, 2007
    Fouling is one of the most vexing problems in water-treatment systems that use membranes to remove suspended and dissolved particles. The deposition and accumulation of these substances on membrane surfaces inevitably lead to loss of performance for the membrane [1]. While there are several strategies for reducing fouling, the right solution varies with the process and type of fouling.  ...
May 1, 2007
    Pure water is an essential ingredient in the manufacture of a vast amount of products in the U.S. and, of course, throughout the world. In the industry for which I work, electricity generation, high-purity water is an absolute must for feeding high-pressure steam generators. But of course, steam generation is also important in the petroleum-refining and petrochemical industries...
May 1, 2007
In order to produce ethanol with nearly 100% purity from fermentation broth, conventional processes use a two-step distillation operation, which accounts for almost 55% of the total energy requirements. Therefore, improving the concentration step is a key to reducing the costs of making bioethanol. A promising step in this direction is a new gating membrane being developed by professor Shin-ichi Nakao at...
March 1, 2007
For developing a new technology that traps carbon dioxide and other pollutants so they can be removed, researchers from the University of Bath's Dept. of Chemical Engineering ( have received the...
November 1, 2006
Researchers from the Center for Synthesis and Chemical Biology (CSCB; Dublin; have developed an ultrathin, nanoporous membrane that can separate carbon dioxide from nitrogen at 600°C; up to now, no...
October 1, 2006
It is well known that palladium membranes are ideal for purifying hydrogen because they allow only H2 to pass through (via diffusion of H atoms) while blocking all other molecules. Because contaminants cannot pass through this pore-free "filter", Pd membrane separation is especially suitable for ultrahigh-purity applications, such as those in the electronics industry, says Charles Krueger, vice...
August 1, 2006
Eltron Research, Inc. (Boulder, Co.;, in partnership with the U.S. Dept. of Energy's (DOE; Washington, D.C.) National Energy Technology Laboratory...
June 1, 2006
Researchers at the Lawrence Livermore National Laboratory (LLNL; Calif.; have constructed a membrane of carbon nanotubes (CNTs) on a silicone chip, which has the potential to reduce the...
March 1, 2006
Next month, Mekorot, Israel National Water Company Ltd. (Tel Aviv, Israel) will start up what is claimed as the world’s first ion-exchange system for selectively removing boron from potable water. The plant, designed and constructed by Treitel Chemical Engineering Ltd. (Tel Aviv; edlinks.che.con/5827-532), will treat 6,500 m3/d of reverse-osmosis-product water at Mekorot’s brackish water...
March 1, 2006
Researchers at the Dept. of Chemical Engineering, University of Texas at Austin ( have developed a rubbery membrane that can be used purify hydrogen. The membrane, based on...
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