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Intensification of gas liquid separations and its application to moisture / tar removal from syngas

Lookup NU author(s): Omer Calkan, Dr Murat Dogru, Professor Galip Akay


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The removal of moisture and tar, as well as other toxins / undesirable gases from combustible gases is a very important process encountered in natural gas and producer gas from the gasification processes. Although there are very well established techniques available, these are costly and lack any form of intensification. We have recently shown that water absorbers based on PolyHIPE Polymers (PHP) can remove tar as well as water from the product gas (syngas) produced through the gasification of biomass / biomass waste such as wood, municipal solid waste etc. Furthermore, moisture / tar removal also promotes metal ion removal from the syngas making it suitable for internal combustion engine or fuel cell applications. The moisture/tar removal is related to the water adsorption capacity of the polymer. These polymers can take up water some 10 times their own weight without swelling (thus do not cause increased pressure drop). If swelling is allowed, adsorption capacity increases to ca. 40 times. Compared with the molecular sieves, this capacity is some 10 times higher for non-swelling PHPs. The moisture/tar adsorption is conducted at ambient temperature and once the polymer is saturated, desorption is carried out at moderate temperatures. It is also possible to use these materials in pressure swing mode. These nano-structured micro-porous polymers can be made with surface area range of 5 m2/g to well over 500 m2/g. The enhanced surface area will be useful to accelerate rate of absorption. These materials have found use in several applications, ranging from support for micro-organisms, demulsification of stable water-in-oil emulsions, catalyst support etc. In this research, high surface area polymers are prepared (above 100 m2/g) and their water and oil adsorption properties are evaluated. Selected polymers are used for the removal of water or kerosene from a carrier gas. Experiments are carried out in packed bed mode and the effects of temperature, gas flow rate and impurity flow rate in the gas stream are evaluated.

Publication metadata

Author(s): Calkan OF, Dogru M, Akay G

Publication type: Conference Proceedings (inc. Abstract)

Publication status: Published

Conference Name: CHISA: 17th International Congress of Chemical and Process Engineering

Year of Conference: 2006

Pages: no. 392

Publisher: Czech Society of Chemical Engineering


Library holdings: Search Newcastle University Library for this item

ISBN: 8086059456