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Separation Processes

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Multilayer membrane for climate control

A triple-layer, porous membrane system developed at the Functional Materials Laboratory at Eidgenössische Technische Hochschule Zürich (www.fml.ethz.ch) can be fashioned into evaporative curtains to cool and humidify indoor spaces, potentially decreasing the energy demand for climate-control systems. Juxtaposing opposite forces…

2017 Chem Show Exhibitors Get the Word Out

The event's Exhibitor Equipment & Technology Showcase offers broad range of opportunities for attendees to learn about exhibitor products The complement to the 2017 Chem Show’s non-promotional Best Practice Seminar series (see above story) is a full slate of 49…

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Extracting lithium without roasting

Lithium Australia NL (Perth, Western Australia; lithium-au.com) has generated 99.8% (battery-grade) lithium carbonate from lithium-bearing silicates, such as spodumene, using its Sileach process — a hydrometallurgical process that does not require an energy-intensive roasting step. The company says Sileach has…

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Liquid metal membranes improve on Pd membranes for separating hydrogen

A liquid metal membrane with liquid gallium (Ga) sandwiched between two porous silicon carbide supports offers a pathway to improve the currently available membranes of solid palladium (Pd) metal for separating hydrogen after the steam reforming of methane. Pd metal…

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Facts at your Fingertips: Air Separation Processes

The components of air (Table 1), especially nitrogen (N2) and oxygen (O2), are critical for many modern industrial processes. Primary metals production, chemical manufacturing, gasification processes, clay, glass and concrete production, welding and other processes depend on O2 from air,…

Chemical Engineering Magazine Booklist: September 2017

The following information describes recently published books relevant to the chemical process industries (CPI): Engineering Energy Storage, By Odne Stokke Burheim, 2017, Academic Press, 252 pages, $125.00. Energetic Materials: Advanced Processing Technologies for Next-Generation Materials. Edited by Mark Mezger, Kay…

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Ammonia as a H2 carrier enabled by a catalytic membrane

A major challenge in using hydrogen to power motor vehicles is the difficulty in transporting H2 to refueling stations. Researchers at CSIRO Energy (Melbourne, Australia; www.csiro.au/energy) have responded to the challenge by converting H2 to NH3 and then using existing…

Reboiler Circuit Debottleneck with No Hardware Changes

 With a thorough investigation and proper problem diagnosis, an entire gas plant limited by a deethanizer reboiler circuit was successfully debottlenecked This article describes a case study of a gas plant (designed by others) that was bottlenecked by the reboil…

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Dry-Tray Pressure Drop of Sieve Trays Revisited

Data points from literature are refined into a single correlation defining dry-tray pressure drop in sieve trays The sieve tray has been in the marketplace as a distillation device for many decades. It has been used extensively on distillation tray…

Crossflow Membrane Filtration Essentials

Several aspects of crossflow membrane filtration, including process design, equipment selection and control, are detailed here A membrane, also referred to as a semipermeable membrane, is a thin layer of material that selectively passes one or more components of a…