Lu Jichang, Liu Jiangping, Zhao Yutong, He Dedong, Han Caiyun, He Sufang, Luo Yongming
Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, PR China.
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650500, PR China.
J Hazard Mater. 2020 Feb 15;384:121289. doi: 10.1016/j.jhazmat.2019.121289. Epub 2019 Sep 25.
As to the treatment of sulfur containing VOCs (examples are compounds of CHSH and CHSH), finding a catalyst with high performance is necessary. In this work, Cr-AlO (x = 1.0, 2.5, 5.0, 7.5 and 10 wt%) catalysts were synthesized, and their behaviors toward CHSH and CHSH abatement were investigated. The results indicated that Cr-AlO exhibited higher activity than other samples and the reported catalysts, on which CHSH could be almost completely converted at 375 °C, while the temperature for the reported catalysts was above 450 °C. Moreover, there was no obvious deactivation during 30 h on stream over Cr-AlO, while only about 10 h was found on the reported CeO and HZSM-5 catalysts. The improvement in the catalytic performance could be explained by the important role of the Cr species, while the state of Cr was suggested to be ineffective in the degradation process. The identification of the active Cr sites was proved by the characterization measurements, and the control experiments by using mechanical mixtures of CrO or CrO with AlO as well as the comparison studies between spent AlO and spent Cr-AlO catalysts.
