TY - JOUR
T1 - Monitoring and Control of an Adsorption System Using Electrical Properties of the Adsorbent for Organic Compound Abatement
AU - Hu, Ming Ming
AU - Emamipour, Hamidreza
AU - Johnsen, David L.
AU - Rood, Mark J.
AU - Song, Linhua
AU - Zhang, Zailong
N1 - Funding Information:
Funding was provided by the National Science Foundation (NSF CBET 12-36203) with an accompanying Research Experience for Undergraduates (REU). Support for M.-M.H. was provided by the China Scholarship Council (201406450022). The views reported here do not necessarily represent the views of these funding agencies.
Publisher Copyright:
© 2017 American Chemical Society.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/7/5
Y1 - 2017/7/5
N2 - Adsorption systems typically need gas and temperature sensors to monitor their adsorption/regeneration cycles to separate gases from gas streams. Activated carbon fiber cloth (ACFC)-electrothermal swing adsorption (ESA) is an adsorption system that has the potential to be controlled with the electrical properties of the adsorbent and is studied here to monitor and control the adsorption/regeneration cycles without the use of gas and temperature sensors and to predict breakthrough before it occurs. The ACFC's electrical resistance was characterized on the basis of the amount of adsorbed organic gas/vapor and the adsorbent temperature. These relationships were then used to develop control logic to monitor and control ESA cycles on the basis of measured resistance and applied power values. Continuous sets of adsorption and regeneration cycles were performed sequentially entirely on the basis of remote electrical measurements and achieved ≥95% capture efficiency at inlet concentrations of 2000 and 4000 ppmv for isobutane, acetone, and toluene in dry and elevated relative humidity gas streams, demonstrating a novel cyclic ESA system that does not require gas or temperature sensors. This contribution is important because it reduces the cost and simplifies the system, predicts breakthrough before its occurrence, and reduces emissions to the atmosphere. (Graph Presented).
AB - Adsorption systems typically need gas and temperature sensors to monitor their adsorption/regeneration cycles to separate gases from gas streams. Activated carbon fiber cloth (ACFC)-electrothermal swing adsorption (ESA) is an adsorption system that has the potential to be controlled with the electrical properties of the adsorbent and is studied here to monitor and control the adsorption/regeneration cycles without the use of gas and temperature sensors and to predict breakthrough before it occurs. The ACFC's electrical resistance was characterized on the basis of the amount of adsorbed organic gas/vapor and the adsorbent temperature. These relationships were then used to develop control logic to monitor and control ESA cycles on the basis of measured resistance and applied power values. Continuous sets of adsorption and regeneration cycles were performed sequentially entirely on the basis of remote electrical measurements and achieved ≥95% capture efficiency at inlet concentrations of 2000 and 4000 ppmv for isobutane, acetone, and toluene in dry and elevated relative humidity gas streams, demonstrating a novel cyclic ESA system that does not require gas or temperature sensors. This contribution is important because it reduces the cost and simplifies the system, predicts breakthrough before its occurrence, and reduces emissions to the atmosphere. (Graph Presented).
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U2 - 10.1021/acs.est.7b00216
DO - 10.1021/acs.est.7b00216
M3 - Article
C2 - 28562025
AN - SCOPUS:85022217837
VL - 51
SP - 7581
EP - 7589
JO - Environmental Science & Technology
JF - Environmental Science & Technology
SN - 0013-936X
IS - 13
ER -