Oxidation of Benzene to Maleic Anhydride in a Fluidized Bed Reactor

Abstract

In this project, the selective oxidation of benzene to maleic anhydride (MAN) was studied. Gas phase catalytic oxidation of benzene was carried out in a laboratory scale fluidized bed reactor on six different types of catalysts, which have different compositions. Effects of temperature, flow rates of benzene and air and catalyst type on the reaction selectivity were investigated at atmospheric pressure. The experiments were performed over a temperature range of 325 to 400°C, a space-time (W/F A0 ) range from 11.28 × 10 5 to 31.9 × 10 5 g s mol -1, and benzene/ air mole ratio changes between 0.0109 and 0.0477. It was seen that conversion of benzene to MAN increased with increasing temperature for the catalysts supported by silica gel, aluminum oxide and titanium oxide. From the results it was found that conversion increased with increasing flow rate of air. When the comparison of the catalysts were made, it could be said that catalysts supported by silica gel showed higher MAN conversions. So it can be concluded that catalysts supported by silica gel were more suitable catalysts for benzene oxidation to MAN in a fluidized bed reactor.

Catalytic Transformation of the Furfural Platform into Bifunctionalized Monomers for Polymer Synthesis

“…Industrially, the production of maleic anhydride can be divided into benzene oxidation, n -butane oxidation, and C 4 olefin oxidation according to the raw materials. ,− The gas-phase oxidation of furfural to maleic anhydride was popularly achieved with vanadium-based catalyst. In the 1970s, Murthy investigated the kinetics of furfural oxidation with the V 2 O 5 catalyst in the temperature range of 493–563 K , The authors found that maleic anhydride and CO 2 were generated by a parallel reaction scheme.…”

Enhanced Catalytic Activity with Oxygen for Methyl Acrylate Production via Cross‐Aldol Condensation Reaction

“…In previous research, the catalyst performance of alkali metal oxide, mainly for Cs, supported γ ‐Al 2 O 3 or ZSM‐5 was discussed for synthesis of MA via aldol condensation of MA with formaldehyde . When the V 2 O 5 ‐P 2 O 5 binary oxide as well as vanadium‐titanium binary phosphates were employed as catalysts for aldol condensation of HCHO with other substances consisting of acetone , acetic acid, and methyl acetate , excellent catalytic activity was stated and all the desired target products were obtained, which convincingly demonstrated that the acid‐base properties of these phosphates catalysts play a vital part in promoting aldol condensations .…”

Experimental Investigation of the Effect of Random Packings on Heat Transfer and Particle Segregation in Packed-Fluidized Bed

“…Fluidization was established as an industrially important concept in the 1940s, during which large-scale implementation of fluid catalytic cracking was widely introduced. It soon extended its range of applications to other areas such as heat transfer, coatings, drying, combustion, gasification, chemical reactors, and adsorption. − One of the advantages of fluidized beds is their ability to provide a relatively uniform bed temperature and high rates of heat transfer . Therefore, they can be used as heat exchanger apparatuses with good performance.…”