In-situ DRIFTS investigations applied to the catalytic hydrogenation and reforming processes

MISAEL CÓRDOBA ARROYO; LINA GARCÍA; JUAN BADANO; CAROLINA BETTI; MÓNICA QUIROGA; CECILIA LEDERHOS

Santa Fe

Workshop; French Argentinean Workshop on Heterogeneous Catalysis; 2023

INCAPE

The initial and decisive step to carry out a catalytic process consists of developing an appropriate catalyst for the reaction of interest. The current trend is to approach rational design and optimization, making use of recent instrumental and theoretical advances. In the last decade Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) has become a very popular method for the characterization of catalysts and it has been applied quite extensively to the identification of all adsorbed species on the surface, and consequently may contribute in the identification of reaction intermediates. Recent works of catalytic systems using infrared absorption spectroscopy to study the adsorption of alkynes and alkenes over supported metal catalysts and single crystals, have been published. On the other hand, in the latest works the catalytic reforming of tar model compounds of a gasification stream of agroforestry residues with in-situ DRIFTS was studied. The interaction between the catalyst, tar model compounds and the main carbon species present in the syngas (CH4, CO2, and CO)were evaluated. In this work, the 1-pentyne selective hydrogenation and toluene catalytic reforming were carried out over different catalysts using a DRIFTS cell. The adsorption, hydrogenation of pure 1-pentyne and reforming of syngas and toluene/syngas mixture were monitored by in situ DRIFTS.