(569p) Development and Performance of Large-Scale Cr2O3/ZSM-5/CaO Bifunctional Monoliths for Propane Oxidative Dehydrogenation

Bifunctional materials (BFMs), which combine adsorbents and catalysts, are emerging as a promising solution for the reactive capture and conversion of CO₂. This study explores the fabrication of a large-scale monolith (~13 cm³) composed of Cr₂O₃/ZSM-5/CaO BFM by filling a packed reactor with the BFM monolith, targeting combined CO₂ capture and propane oxidative dehydrogenation (CO₂-ODHP). A honeycomb monolith incorporating three different weight proportions of adsorbent and catalyst components was 3D printed to assess their performance in the CO₂-ODHP process. The study found that under optimal adsorbent-to-catalyst weight ratios and 650-700 °C adsorption-reaction conditions, the BFMs achieved high propane and CO₂ conversion rates, along with high propylene selectivity, across multiple consecutive experiments. Overall, this study offers valuable insights into the development of large-scale bifunctional materials, advancing the commercial application of printed BFM monoliths.