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Heat Transfer

Oil from Sand

In these hard economic times, people working in troubled businesses may well envy the situation of Alberta’s oil sands industry. The Canadian Association of Petroleum Producers (CAPP, Calgary, Alberta; www.capp.ca) predicts that the production of synthetic crude from oil sands…

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Compact Heat Exchangers: Improving Heat Recovery

There is increasing pressure on industry to reduce both energy usage and the associated CO2 emissions. An important and profitable action that industry can take is to recover more process energy and thus improve the efficient use of that energy.…

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Plate Heat Exchangers: Avoiding Common Misconceptions

The use of gasketed plate-and-frame heat exchangers has gained tremendous acceptance in the chemical process industries (CPI) over the past 20 years due to their high heat-transfer coefficients, compactness and low cost. However, it is important for the engineer who…

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Chementator: Construction to begin on a large solar plant in Spain

Thanks to a €171-million financing deal, construction can begin on what is claimed to be the world’s first utility-grade solar power plant with central tower and salt receiver technology. When the so-called Gemasolar plant — located in Fuentes de Andalucia,…

This centrifugal reactor/separator speeds up biodiesel production

A continuous process for producing biodiesel that has a residence time of about one minute, versus several hours for a conventional batch process, has been developed at Oak Ridge National Laboratory (ORNL; Oak Ridge, Tenn.; www.ornl.gov). The process uses a…

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Chementator: A pilot-step closer to second-generation biofuels

Lurgi GmbH (Frankfurt, Germany; www.lurgi.com) is building a pilot plant to demonstrate the viability of its three-stage bioliq process for producing liquid fuels from biomass. The pilot plant — an entrained-flow gasifier for the production of synthesis gas — will…

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Chementator: A sound way to reuse low-temperature waste heat

In a so-called thermoacoustic engine, researchers from the Energy Research Center of the Netherlands (ECN; Petten, Netherlands; www.ecn.nl) have achieved a record efficiency in the conversion of heat to sound, improving the existing record of 41% to 48% of the…

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A primer on coal-to-liquids

As an energy resource, global coal reserves represent 2,000 billion barrels of oil equivalent. In 2007, global oil reserves were about 1,300 billion barrels of oil. World wide, oil demand will grow 40 to 50% by 2030. But coal offers…

Chementator: Pretreatment helps recover more coal from primary flotation step

Coal is typically cleaned by gravity separation to reduce ash and pyrite content, with flotation used to recover fines. Various methods have been applied to disperse fine clay particles from the surface of coal particles and thus improve coal flotation…

Chementator: This LNG vaporization process will reduce air emissions

A new method for vaporizing liquefied natural gas (LNG) that is more environmentally friendly than the traditional submerged combustion vaporization (SCV) process is being offered by Black & Veatch (B&V; Overland Park, Kan.; www.bv.com). In an SCV process, LNG is…