In this study, cooperative bi-functional materials (BFMs) – comprised of combined adsorbent and catalyst materials – are synthesized and processed through additive manufacturing by 3D printing adsorbent/catalyst monoliths with a CaO adsorbent phase balanced against an M@ZSM-5 (M = In, Ce, Cr, or Mo oxide) heterogeneous catalyst phase. The adsorbent/catalyst monoliths were characterized using NH3-TPD, H2-TPR, N2 physisorption, XPS, XRD, pyridine-FTIR, C3H8-DRIFTS, and EDS. Their performances were evaluated for combined CO2 capture and propane dehydrogenation at 600-700 οC. These experiments revealed that a reaction temperature of 600 οC generates the best performance for all samples due to the shift towards thermal cracking at higher temperatures. Moreover, 600 οC was usable for both CO2 adsorption and catalysis, so the materials reported here could truly perform both adsorption and catalysis isothermally. Of the materials, CaO-Mo@ZSM-5 displayed the best performance, generating 20.4% propylene yield, 20% propane conversion, 75% CO2 conversion and 5.4 mmol/g CO2 capture capacity at 600 οC. Overall, this work accomplishes three key goals in that it i) expands the concept of BFM materials to a previously unexplored reaction ii) provides a facile way of structuring BFM materials into practical contactors, and iii) allows adsorption and catalysis to occur at the same temperature.

Adsorption-enhanced bifunctional catalysts for in-situ CO2 capture and utilization in hydrogen and light olefins production

Where thousands of chemistry professionals meet to share ideas and advance scientific and technical knowledge. Spring 2023 abstracts, posters, and presentations will launch at the end of March.

ACS Spring 2023

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.