Partial Oxidation of H(2)S to Sulfur Over Mo and/or W-Containing Bronzes with a TTB-Structure

[EN] Mo- and W-based oxidic bronzes, with and without Te-atoms in framework positions are active and selective, for the partial oxidation of H2S to sulfur in the 160–220 C temperature range. The catalysts have been prepared by a hydrothermal synthesis and heat-treated in N2 at 600 C, and characterized by several physico-chemical techniques, i.e. AAS, SBET, XRD, SEM–EDX, DR UV–vis and XPS. Te-free catalysts are active, selective and stable for the partial oxidation of H2S to sulfur. V-atoms in Mo– O–V pairs can be proposed as the active sites. Moreover, Te-containing materials show fast catalyst decay. This catalyst deactivation can be related to the presence of Te0 and MoS2, which are observed in used catalyst.Financial support from DGICYT in Spain through Project CTQ2009-14495 is gratefully acknowledged.Soriano Rodríguez, MD.; Concepción Heydorn, P.; Botella Asuncion, P.; López Nieto, JM. (2011). Partial Oxidation of H(2)S to Sulfur Over Mo and/or W-Containing Bronzes with a TTB-Structure. Topics in Catalysis. 54(10):729-736. doi:10.1007/s11244-011-9680-3S729736541