Adsorption of CO2 and CH4 in zeolites for dry reforming process optimization

CO2 reforming of CH4 consists in reacting these two main greenhouse gases to produce syngas (H2 and CO). If zeolite-based catalysts are promising candidates, the challenge is often to cope with rapid catalyst deactivation. Zeolites are aluminosilicates with channels and cavities in their structure, where the catalytic reaction occurs. Understanding the exact location of the active sites for CO2 and CH4 in the zeolitic materials is therefore of crucial importance to optimize the catalytic reaction and prevent the deactivation of the catalyst. In this project, we will investigate in situ a series of ZSM-5 zeolites exchanged with different cations (Ni, Co and Pt) in contact with CO2, CH4, and a mix CO2/CH4. The structural evolution of the catalyst, the number of adsorbed molecules and the presence of molecule-zeolite interaction will be followed in situ at ID22 by high-resolution powder diffraction.