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J Air Waste Manag Assoc

Title:		A new method for the rapid determination of volatile organic compound breakthrough times for a sorbent at concentrations relevant to indoor air quality
Author(s):		Scahill J; Wolfrum EJ; Michener WE; Bergmann M; Blake DM; Watt AS;
Address:		"National Renewable Energy Laboratory, Golden, Colorado 80401, USA"
Journal Title:		J Air Waste Manag Assoc
Year:		2004
Volume:		54
Issue:		1
Page Number:		105 - 110
DOI:		10.1080/10473289.2004.10470879
ISSN/ISBN:		1096-2247 (Print) 1096-2247 (Linking)
Abstract:		"The use of sorbents has been proposed to remove volatile organic compounds (VOCs) present in ambient air at concentrations in the parts-per-billion (ppb) range, which is typical of indoor air quality applications. Sorbent materials, such as granular activated carbon and molecular sieves, are used to remove VOCs from gas streams in industrial applications, where VOC concentrations are typically in the parts-per-million range. A method for evaluating the VOC removal performance of sorbent materials using toluene concentrations in the ppb range is described. Breakthrough times for toluene at concentrations from 2 to 7500 ppb are presented for a hydrophobic molecular sieve at 25%) relative humidity. By increasing the ratio of challenge gas flow rate to the mass of the sorbent bed and decreasing both the mass of sorbent in the bed and the sorbent particle size, this method reduces the required experimental times by a factor of up to several hundred compared with the proposed American Society of Heating, Refrigerating, and Air-Conditioning Engineers method, ASHRAE 145P, making sorbent performance evaluation for ppb-range VOC removal more convenient. The method can be applied to screen sorbent materials for application in the removal of VOCs from indoor air"
Keywords:		"Adsorption Air Pollution, Indoor/*analysis Environmental Monitoring/instrumentation/*methods Humidity Organic Chemicals/analysis Particle Size Time Factors Toluene/analysis Volatilization;"
Notes:		"MedlineScahill, John Wolfrum, Edward J Michener, William E Bergmann, Michael Blake, Daniel M Watt, Andrew S eng Research Support, U.S. Gov't, Non-P.H.S. 2004/02/12 J Air Waste Manag Assoc. 2004 Jan; 54(1):105-10. doi: 10.1080/10473289.2004.10470879"