Millistructured Reactor as Tool for Investigating the Kinetics of Maleic Anhydride Synthesis

Abstract

This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.A nearly isothermal millistructured fixed-bed reactor was used to investigate the kinetics of the selective oxidation of n-butane to maleic anhydride. In addition to the investigation of a broad range of industrially relevant conditions, the focus was on the influence of the reaction products on the kinetics. For this purpose, a saturator for the accurate dosing of the target product MA was developed. The experimental data were used to derive a reaction network comprising the by-products acetic and acrylic acid. Additionally, the inhibition of the associated reactions by reactants and products was investigated.

Improved Kinetics ofn-Butane Oxidation to Maleic Anhydride: The Role of Byproducts

“…Regarding the selectivities to CO and CO 2 , the description is much more difficult. As stated in earlier works, , the CO/CO 2 ratio strongly depends on the operating conditions. Kinetic approaches without any differentiation between CO and CO 2 or a fixed CO/CO 2 ratio, therefore, cannot describe their formation correctly.…”

“…Especially the CO/CO 2 ratio could not be reproduced correctly. Therefore, the aim of the present work was to improve the kinetics based on the results of previous publications. , For this purpose, in the first step, a heterogeneous model of the used laboratory reactor was derived.…”

“…A substantial advantage of this reactor is its almost isothermal behavior, which allows kinetic measurements without disruptive influences through heat transport limitations. Further details on the reactor and its periphery, as well as the procedure of the experiments, have been described elsewhere. , …”

Bifunctional catalyst of mordenite‐ and alumina‐supported platinum for isobutane hydroisomerization to n‐butane

“…where P i is the effect percentage of each variable and α i is the statistically significant coefficient in Equation (5).…”

“…In the process of steam cracking, the ethylene yields of n ‐butane and isobutane are 48% and 18%, respectively. [ 2 ] N ‐butane is also used for dehydrogenation to butene, [ 3,4 ] oxidation to anhydride [ 5,6 ] and acetic acid, and substitution to halobutane and nitrobutane. In addition, methyl tert‐butyl ether (MTBE), a main downstream product of isobutane, is banned due to its toxicity and environmental unfriendliness, resulting in overcapacity of isobutane.…”