Selective Oxidation of Propane to Acrylic Acid on Mo-V-Te-Nb Oxides Catalyst

摘要

The availability and low cost of alkanes have generated much recent interest in the oxidative catalytic conversion of alkanes to olefins, oxygenates, and nitriles in the petroleum and petrochemical industries. Especially the direct selective oxidation of propane to acrylic acid using molecular oxygen as oxidant is highly attractive. Three main system catalysts have been studied for the direct oxidation of propane to acrylic acid, including VPO-type catalysts, heteropoly compounds, and mixed oxide catalysts. To date, significant progress has been made in all of the three, especially the mixed metal oxide catalysts. The Mo-V-Te-Nb-O system catalysts reported by T.Ushikubo in the patent is the most promising catalysts. This high yield of acrylic acid was only reported in patents, and very limited fundamental information was reported on the synthesis of this mixed metal oxide system. This information is critical for the development of improved catalysts for selective oxidation of propane. This presentation aims at demonstrating the influence of different drying methods, calcination methods and calcination temperatures of catalysts with the elemental composition of Mo_1V_(0.3)Te_(0.23)Nb_(0.12)O_n on catalytic performance for selective oxidation of propane to acrylic acid.