Regularities of solid-phase interaction of tin and molybdenum oxides: Catalytic properties

Authors

• Kien Cuong Dao ¹
• Alexander Aleksandrovich Il’in ¹
• Ruslan Nikolaevich Rumyantsev * ¹
• Ulyana Sergeevna Uzhevskaya ¹
• Alexander Papvlovich Il’in ¹
• Taisiya Andreevna Rumyantseva ²

1. Department of Inorganic Technology, Ivanovo State University of Chemistry and Technology, Sheremetievskiy Ave., 7, Ivanovo, 153000, Russia.
2. Department of Technology of Fine Organic Synthesis, Ivanovo State University of Chemistry and Technology, Sheremetievskiy Ave., 7, Ivanovo, 153000, Russia.

Abstract

The interaction in the system of SnO₂ and h-MoO₃ prepared by their joint mechanical activation in a roller-ring vibratory mill was investigated. A series of catalysts was prepared with SnO₂: h-MoO₃ molar ratio 1:1; 1:2.3; 2.3:1 and 5.7:1. The catalysts were characterized by various techniques including X-ray phase, X-ray diffraction (XRD) and synchronous thermal analysis, scanning electron microscopy (SEM), BET method. An important effect of the introduction of molybdenum atoms into the structure of SnO₂ was lattice defect. Heat treatment of the mechanically activated mixture at a temperature of 600–750  resulted in obtaining crystalline Sn(MoO₄)₂. The catalytic activity of the samples was investigated by the oxidative dehydrogenation of methanol. The results reported that varying the SnO₂:MoO₃ ratio allows adjusting the selectivity of the methanol conversion process over methyl formate and dimethyl ether.

Keywords

• Solid solution
• SnO2
• h-MoO3
• Sn(MoO4)2
• Mechanical activation
• Catalytic properties.