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Competitive adsorption of gaseous aromatic hydrocarbons in a binary mixture on nanoporous covalent organic polymers at various partial pressures

Title
Competitive adsorption of gaseous aromatic hydrocarbons in a binary mixture on nanoporous covalent organic polymers at various partial pressures
Author
김기현
Keywords
Benzene; Toluene; Covalent organic polymers; Isotherm models; Adsorption
Issue Date
2019-06
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation
Environmental Research, v. 173, Page. 1-11
Abstract
Covalent-organic polymers (COPs) are recognized for their great potential for treating diverse pollutants via adsorption. In this study, the sorption behavior of benzene and toluene was investigated both individually and in a binary mixture against two types of COPs possessing different -NH2 functionalities. Namely, the potential of COPs was tested against benzene and toluene in a low inlet partial pressure range (0.5-20 Pa) using carbonyl-incorporated aromatic polymer (CBAP)-1-based diethylenediamine (EDA) [CD] and ethylenetriamine (DETA) [CE]. The maximum adsorption capacity and breakthrough values of both COPs showed dynamic changes with increases in the partial pressures of benzene and toluene. The maximum adsorption capacities (A(max)) of benzene (as the sole component in N-2 under atmospheric conditions) on CD and CE were in the range of 24-36 and 33-75 mg g(-1), respectively. In contrast, with benzene and toluene in a binary mixture, the benzene A(max) decreased more than two-fold (range of 2.7-15 and 6-39 mg g(-1), respectively) due to competition with toluene for sorption sites. In contrast, the toluene A(max) values remained consistent, reflecting its competitive dominance over benzene. The adsorption behavior of the targeted compounds (i.e., benzene and toluene) was explained by fitting the adsorption data by diverse isotherm models (e.g., Langmuir, Freundlich, Elovich, and Dubinin-Radushkevich). The current research would be helpful for acquiring a better understanding of the factors affecting competitive adsorption between different VOCs in relation to a given sorbent and across varying partial pressures.
URI
https://www.sciencedirect.com/science/article/pii/S0013935119301562?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/151868
ISSN
0013-9351; 1096-0953
DOI
10.1016/j.envres.2019.03.028
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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