Design and Parallel Synthesis of Novel Selective Hydrogen Oxidation Catalysts and their Application in Alkane Dehydrogenation

Abstract

A library of 19 supported metal oxides of group IIIA, IVA, and VA metals is prepared using a simple gram‐scale reactor for parallel pore impregnation. The activity, stability, and selectivity of these potential hydrogen combustion catalysts in the dehydrogenation of ethane to ethylene at 600 °C is examined over several redox cycles using gas mixtures that simulate real process conditions. Lead, indium, and thallium oxides are highly selective (>99.9%) to hydrogen combustion. Low‐loading catalysts are found to exhibit higher oxygen exchange activity. Differences between co‐fed and redox oxidative dehydrogenation are discussed.

Reduction Kinetics of Perovskite Oxides for Selective Hydrogen Combustion in the Context of Olefin Production

“…[18,19] Pioneering contributions by Grasselli and coworkers identified a set of highly selective metal oxide-based catalysts capable of enhancing propylene yields from propane, including a supported Bi 2 O 3 catalyst which enabled a 140% increase in propylene generation at 540°C. [20][21][22] Subsequent research has focused on the incorporation of SHC catalysts into alkane dehydrogenation processes to improve the yields of ethylene, [23][24][25] propylene, [26][27][28][29][30] etc. Recent work within the chemical looping community showcased improved olefin yields from the conversion of ethane (via CL-ODH) and n-hexane feedstocks resulting from hydrogen combustion by highly selective redox catalysts.…”

Sustainable selective oxidations using ceria-based materials

“…Sb 2 O 4 , In 2 O 3 and Bi 2 O 3 ). [102][103][104][105] These are, however, unstable under high temperature redox cycling. Conversely, ceria is stable under redox cycling and has a good oxygen storage capacity.…”

A Structured Monodisperse PEG for the Effective Suppression of Protein Aggregation

“…After reduction of the ceria, the oxygen vacancies are refilled using air, thus starting a cyclic redox process. Studies by Graselli et al,5–7 Lin et al,8 and us9 showed that supported metal oxides can also perform this selective oxidation. However, these catalysts are not stable under redox cycling.…”