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Huan Jing Ke Xue

Title:		[Oxidation behavior and kinetics of representative VOCs emitted from petrochemical industry over CuCeOx composite oxides]
Author(s):		Chen CW; Yu YK; Chen JS; He C;
Address:
Journal Title:		Huan Jing Ke Xue
Year:		2013
Volume:		34
Issue:		12
Page Number:		4724 - 4733
DOI:
ISSN/ISBN:		0250-3301 (Print) 0250-3301 (Linking)
Abstract:		"CuCeOx composite catalysts were synthesized via coprecipitation (COP-CuCeO,) and incipient impregnation (IMP-CuCeOx) methods, respectively. The physicochemical properties of the samples were characterized by XRD, low-temperature N2 sorption, H2-TPR and O2-TPD. The influences of reactant composition and concentration, reaction space velocity, O2 content, H2O concentration, and catalyst type on the oxidation behaviors of benzene, toluene, and n-hexane emitted from petrochemical industry were systematically investigated. In addition, the related kinetic parameters were model fitted. Compared with IMP-CuCeOx, COP-CuCeOx had well-dispersed active phase, better low-temperature reducibility, and more active surface oxygen species. The increase of reactant concentration was unfavorable for toluene oxidation, while the opposite phenomenon could be observed in n-hexane oxidation. The inlet concentration of benzene was irrelevant to its conversion under high oxidation rate. The introduction of benzene obviously inhibited the oxidation of toluene and n-hexane, while the presence of toluene had a positive effect on beuzene conversion. The presence of n-hexane could promote the oxidation of toluene, while toluene had a negative influence on e-hexane oxidation. Both low space velocity and high oxygen concentration were beneficial for the oxidation process, and the variation of oxygen content had negligible effect on n-hexane and henzene oxidation. The presence of H2O noticeably inhibited the oxidation of toluene, while significantly accelerated the oxidation procedure of henzene and n-hexane. COP-CuCeOx had superior catalytic performance for toluene and benzene oxidation, while IMP-CuCeOx showed higher n-hexane oxidation activity under dry condition. The oxidation behaviors under different conditions could be well fitted and predicted by the pseudo first-order kinetic model"
Keywords:		"Air Pollutants/*analysis Benzene/chemistry Catalysis *Extraction and Processing Industry Hexanes/chemistry Kinetics Models, Chemical Oxidation-Reduction Oxides/*chemistry Petroleum/analysis Toluene/chemistry Volatile Organic Compounds/*analysis;"
Notes:		"MedlineChen, Chang-Wei Yu, Yan-Ke Chen, Jin-Sheng He, Chi chi China 2014/03/20 Huan Jing Ke Xue. 2013 Dec; 34(12):4724-33"