processes Article Promotional Effects of Rare-Earth Praseodymium (Pr) Modification over MCM-41 for Methyl Mercaptan Catalytic Decomposition Xiaohua Cao 1,2,3, Jichang Lu 1,2,3,*, Yutong Zhao 1,2,3, Rui Tian 1,2,3, Wenjun Zhang 1,2,3, Dedong He 2,3,4 and Yongming Luo 1,2,3,* 1 Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China;
[email protected] (X.C.);
[email protected] (Y.Z.);
[email protected] (R.T.);
[email protected] (W.Z.) 2 The Innovation Team for Volatile Organic Compounds Pollutants Control and Resource Utilization of Yunnan Province, Kunming 650500, China;
[email protected] 3 The Higher Educational Key Laboratory for Odorous Volatile Organic Compounds Pollutants Control of Yunnan Province, Kunming 650500, China 4 Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, China * Correspondence:
[email protected] (J.L.);
[email protected] (Y.L.) Abstract: Praseodymium (Pr)-promoted MCM-41 catalyst was investigated for the catalytic decom- position of methyl mercaptan (CH3SH). Various characterization techniques, such as X-ray diffraction (XRD), N2 adsorption–desorption, temperature-programmed desorption of ammonia (NH3-TPD) and carbon dioxide (CO -TPD), hydrogen temperature-programmed reduction (H -TPR), and X-ray 2 2 photoelectron spectrometer (XPS), were carried out to analyze the physicochemical properties of material. XPS characterization results showed that praseodymium was presented on the modified Citation: Cao, X.; Lu, J.; Zhao, Y.; catalyst in the form of praseodymium oxide species, which can react with coke deposit to prolong Tian, R.; Zhang, W.; He, D.; Luo, Y.