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Environ Technol

Title:		Relevance of an organic solvent for absorption of siloxanes
Author(s):		Ghorbel L; Tatin R; Couvert A;
Address:		"Ecole Nationale Superieure de Chimie de Rennes, I, CNRS, UMR 6226, 11 Allie de Beaulieu, CS 50837, 35708 Rennes Cedex 7, France. Ecole des Metiers de I 'Environnement, Campus de Ker Lann, Avenue Robert Schuman, 35170 Bruz, France"
Journal Title:		Environ Technol
Year:		2014
Volume:		35
Issue:		1-Apr
Page Number:		372 - 382
DOI:		10.1080/09593330.2013.828778
ISSN/ISBN:		0959-3330 (Print) 0959-3330 (Linking)
Abstract:		"A wide range of siloxanes exist but the most abundant in biogas are Hexamethyldisiloxane (L2) and Octamethyltrisiloxane (L3) as linear siloxanes and Octamethylcyclotetrasiloxane (D4) as a cyclic siloxane. In order to remove volatile organic compound from biogas, different processes can be used. A promising process for siloxane removal is their absorption in an organic solvent. In this work, three oils were tested to absorb the selected siloxanes: silicone oil 47V20, Seriola 1510 and Polyalphaolefin. Initially, the characterization of these oils was realized by measuring their viscosities and densities, depending on temperature. The second time, the absorption capacity of the siloxanes by selected oils was characterized through the determination of their Henry's constants, but also owing to the implementation of a wet-wall column. Both Henry's constants and removal efficiencies in continuous regime revealed that silicone oil (47V20) can be considered as the most efficient oil among the three selected siloxanes. Moreover, the cyclic siloxane (D4) showed more affinity with oils than linear siloxanes. Silicone oil 47V20 appeared to be the best oil (intermediate price 14 euro/L, low viscosity, low volatility, chemical inertness (no corrosion) and resistance to high and low temperatures)"
Keywords:		Absorption Air Pollutants/*chemistry/*isolation & purification Materials Testing Organic Chemicals/*chemistry Siloxanes/*chemistry/*isolation & purification Solvents/*chemistry;
Notes:		"MedlineGhorbel, Leila Tatin, Romuald Couvert, Annabelle eng Comparative Study England 2014/03/08 Environ Technol. 2014 Jan-Feb; 35(1-4):372-82. doi: 10.1080/09593330.2013.828778"