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Appl. Sci. 2017, 7(6), 609; doi:10.3390/app7060609

Kinetics Study of Gas Pollutant Adsorption and Thermal Desorption on Silica Gel

1
School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
2
Beijing Spacecrafts, Beijing 100094, China
3
Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration, Nanjing 211102, China
*
Author to whom correspondence should be addressed.
Academic Editor: Peter Van Puyvelde
Received: 6 April 2017 / Revised: 7 June 2017 / Accepted: 8 June 2017 / Published: 12 June 2017
(This article belongs to the Section Chemistry)
View Full-Text   |   Download PDF [1667 KB, uploaded 12 June 2017]   |  

Abstract

Silica gel is a typical porous desiccant material. Its adsorption performance for gaseous air pollutants was investigated to determine its potential contribution to reducing such pollutants. Three gaseous air pollutants, toluene, carbon dioxide, and methane, were investigated in this paper. A thermogravimetric analyzer was used to obtain the equilibrium adsorption capacity of gases on single silica gel particles. The silica gel adsorption capacity for toluene is much higher than that for carbon dioxide and methane. To understand gas pollutant thermal desorption from silica gel, the thermogravimetric analysis of toluene desorption was conducted with 609 ppm toluene vapor at 313 K, 323 K, and 333 K. The overall regeneration rate of silica gel was strongly dependent on temperature and the enthalpy of desorption. The gas pollutant adsorption performance and thermal desorption on silica gel material may be used to estimate the operating and design parameters for gas pollutant adsorption by desiccant wheels. View Full-Text
Keywords: silica gel; gas pollutant; adsorption kinetics; thermal regeneration; experimental analysis silica gel; gas pollutant; adsorption kinetics; thermal regeneration; experimental analysis
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MDPI and ACS Style

A, R.; Liu, M.; Pang, L.; Yang, D.; Wang, J.; Zhou, Y. Kinetics Study of Gas Pollutant Adsorption and Thermal Desorption on Silica Gel. Appl. Sci. 2017, 7, 609.

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