Dehydrogenation of homocyclic liquid organic hydrogen carriers (LOHCs) over Pt supported on an ordered pore structure of 3-D cubic mesoporous KIT-6 silica

Pt supported on ordered mesoporous silica (KIT-6) catalyst was examined for the dehydrogenation of homocyclic liquid organic hydrogen carriers (LOHCs, 1: MCH, 2: hydrogenated biphenyl-based eutectic mixture (H-BPDM)) conditions. The longer pore-residence time MCH molecules in 3D bicontinuous pore structure Pt/KIT-6 strongly affected catalytic activity because a higher concentration achieved vicinity active sites. exhibited surface area, volume, and dispersion with narrower particle size distribution (average size: ~1.3 nm). Therefore, LOHC conversion faster production occurred, selectivity over compared Pt/SiO2 Pt/Al2O3. Long-term experiment results indicated that stable reaction than other catalysts. No significant structural collapse occurred KIT-6 during dehydrogenation. Carbon coking observed all three samples.