TY - JOUR ID - 72818 TI - Preparation, Physiochemical and Kinetic Investigations of V2O5/SiO2 Catalyst for the Sulfuric Acid Production JO - International Journal of Engineering JA - IJE LA - en SN - 1025-2495 AU - Hosseini-Ardali, Seyed Mohsen AU - Fattahi, Moslem AU - Kazemeini, Mohammad AU - Tavassoli, Abdoreza AD - Chemical and Petroleum Engineering, harif University of Technology AD - Chemical Engineering, Petroleum University of Technology AD - Chemical and Petroleum Engineering, Sharif University of Technology Y1 - 2016 PY - 2016 VL - 29 IS - 11 SP - 1478 EP - 1488 KW - Vanadium pentoxide KW - Sulfur Dioxide KW - oxidation KW - Catalyst preparation KW - reaction kinetics DO - N2 - V2O5/SiO2 catalyst was utilized to oxidize SO2 to SO3 species in the presence of oxygen mainly for producing sulfuric acid. For this catalyst, the active phase was a mixture of vanadium pentoxide and basic sulfate/pyrosulfate material. This active phase at the reaction temperature behaved as a liquid filling up the pores of the silica support. On the other hand, amounts of the SO3 and V5+ species in the catalyst necessarily varied with the concentration of the feed material and temperature rendering complexity to the kinetics of the SO2 oxidation reaction. In the current research, the catalyst preparation with different amounts of such materials was undertaken. Purified diatomaceous earth of a Persian Gulf beach was chosen as the support for this catalyst. The suitability of the prepared catalyst to determine the reaction kinetics was confirmed through the XRD, XRF and BET-BJH analyses as well as color analysis. Moreover, the aforementioned reaction kinetics was studied empirically. In addition, a model for the reaction rate using the response surface methodology (RSM) was presented. In this venue, factors including the reaction temperature as well as conversion were considered. This reaction kinetics determined at the operating conditions of 380-420 °C, 0.108 MPa and feed gas composition of 10 wt.% SO2, 18.9 wt.% O2 and 71.1 wt.% N2. It was revealed that, obtained kinetic rate constants satisfied the Arrhenius relationship from which the activation energies were determined. UR - https://www.ije.ir/article_72818.html L1 - https://www.ije.ir/article_72818_db0cfeb248024cfdbf313a15d1d57b9c.pdf ER -