Catalytic combustion of volatile aromatic compounds over CuO-CeO2 catalyst

• Published in: The Korean journal of chemical engineering 2017, 34(7), 208, pp.1944-1951
• Main Authors: Xie, Hongmei, Du, Qinxiang, Li, Hui, Zhou, Guilin, Chen, Shengming, Jiao, Zhaojie, Ren, Jianmin
• Format: Article
• Language: English
• Subjects: Aromatic compounds; Benzene; Biotechnology; Catalysis; Catalysts; Catalytic converters; Chemical synthesis; Chemistry; Chemistry and Materials Science; Combustion; Copper oxides; Ethylbenzene; Hydrocarbons; Industrial Chemistry/Chemical Engineering; Materials Science; Organic compounds; Properties (attributes); Reaction Engineering; Solid solutions; Toluene; VOCs; Volatile organic compounds; X ray photoelectron spectroscopy; X-ray diffraction; X-rays; Xylene; 화학공학
• ISSN: 0256-1115; 1975-7220
• DOI: 10.1007/s11814-017-0111-4

Ce 1− x Cu x O 2 oxide solid solution catalysts with different Ce/Cu mole ratios were synthesized by the one-pot complex method. The prepared Ce 1− x Cu x O 2 catalysts were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and H 2 temperature-programmed reduction (H 2 -TPR). Their catalytic properties were also investigated by catalytic combustion of phenyl volatile organic compounds (PVOCs: benzene, toluene, xylene, and ethylbenzene) in air. XRD analysis confirmed that the CuO species can fully dissolve into the CeO 2 lattice to form CeCu oxide solid solutions. XPS and H 2 -TPR results indicated that the prepared Ce 1− x Cu x O 2 catalysts contain abundant reactive oxygen species and superior reducibility. Furthermore, the physicochemical properties of the prepared Ce 1− x Cu x O 2 catalysts are affected by the Ce/Cu mole ratio. The CeCu 3 catalyst with Ce/Cu mole ratio of 3.0 contains abundant reactive oxygen species and exhibits superior catalytic combustion activity of PVOCs. Moreover, the ignitability of PVOCs is also affected by the respective physicochemical properties. The catalytic combustion conversions of ethylbenzene, xylene, toluene, and benzene are 99%, 98.9%, 94.3%, and 62.8% at 205, 220, 225, and 225 °C, respectively.