Hydrogenation of naphthalene over noble metal supported on mesoporous zeolite in the absence and presence of sulfur

Ring opening of decalin over bifunctional Ni–W carbide/Al2O3–USY catalysts and monofunctional acid Ni–W oxide/Al2O3–USY

“…The studies about monofunctional acid catalysts 3,6,8 showed that the ring contraction was the rst step on ring opening of decalin, and then followed by ring opening and cracking processes. And the monofunctional metallic catalysts 6,7,9,10 showed different catalytic mechanism with monofunctional acid catalysts and three different ring opening mechanisms were proposed, 11,12 including the multiplet mechanism, the dicarbene mechanism and the metallocyclobutane mechanism.…”

Mesoporous zeolite-supported metal sulfide catalysts with high activities in the deep hydrogenation of phenanthrene

“…Because aromatic hydrogenation is an exothermic and reversible reaction, catalysts with high activities at low temperature and pressure could benefit deep hydrogenation. Extensive studies show that noble metal catalysts such as Pd, Pt, and Pd-Pt have high activities [12][13][14], but they are fairly sensitive to sulfur and nitrogen compounds, severely limiting their practical applications [15][16][17][18]. Therefore, developing highly active catalysts with good sulfur resistance for the deep hydrogenation of aromatics at low temperature and pressure is of great importance for the cost-effective production of clean diesel fuel.…”

Boosting Size‐Selective Hydrogen Combustion in the Presence of Propene Using Controllable Metal Clusters Encapsulated in Zeolite

“…Confining metal clusters within the cavities of zeolite can allow active sites to select reactants and transition states based on molecular size and protect such clusters against sintering . However, as we and others found, the catalytic efficiency of these catalysts was significantly lowered in the presence of competitive reactants interacting strongly with zeolite, such as in the case of methanol oxidative dehydrogenation on Na(RuO 2 )A in presence of 2‐methyl‐1‐propanol), 1‐hexene hydrogenation on silicalite‐1 coated Pt/TiO 2 catalyst in presence of 3,3‐dimethylbut‐1‐ene, and naphthalene hydrogenation on mesoporous KA encapsulated Pt catalyst in presence of dibenzothiophene . Hydrocarbons with larger size tend to interfere with diffusion of other reactants into zeolite channels .…”