Study on sulfur-tolerant benzene hydrogenation catalyst based on Pt-encapsulated sodalite zeolite

Cooperation of Pt and TiOx in the Hydrogenation of Nitrobenzothiazole

“…9 Pt/SOD-H and Pt/SOD-M (M = Mg, Ca, and Ba) have been reported to show high sulfur-poisoning resistance properties due to the shape selectivity and hydrogen spillover in benzene hydrogenation in the presence of sulfur compounds, e.g., H 2 S and thiophene. 10 The alloying of Cr or W with Pd increases the antisulfur ability of Pd in toluene hydrogenation in the presence of thiophene, possibly due to the increased surface electron deficiency of Pd. 11,12 Although metal sulfides, such as NiMoS and CoMoS, are more resistant to sulfur poisoning than metal catalysts, 13 their high hydrodesulfurization activity may decompose the benzothiazole compounds.…”

“…Several strategies have been reported to enhance the antisulfur poisoning properties of supported metal catalysts. − Zhang and co-workers reported that the triphenylphosphine ligand could significantly improve the activity of Pd/C in the sulfur-containing reaction system by slowing down the sulfidation on Pd to regenerate the active metallic Pd surface in the hydrogenation of 4-nitroanisole at high temperature . Pt/SOD-H and Pt/SOD-M (M = Mg, Ca, and Ba) have been reported to show high sulfur-poisoning resistance properties due to the shape selectivity and hydrogen spillover in benzene hydrogenation in the presence of sulfur compounds, e.g., H 2 S and thiophene . The alloying of Cr or W with Pd increases the antisulfur ability of Pd in toluene hydrogenation in the presence of thiophene, possibly due to the increased surface electron deficiency of Pd. , Although metal sulfides, such as NiMoS and CoMoS, are more resistant to sulfur poisoning than metal catalysts, their high hydrodesulfurization activity may decompose the benzothiazole compounds.…”

Promoting Catalytic Performance Involving Hydrogen Spillover by Ion Exchange of Pt@A Catalysts to Regulate Reactant Adsorption

“…38 Although there have been a few research studies about extra-framework cations in zeolites enhancing catalytic performance, boosting the activity of spillover hydrogenation by ion exchange of zeolites still needs to be further explored. 34 Herein, a series of ion-exchanged LTA zeolite-encapsulated Pt nanoclusters (Pt@NaA, Pt@HA, Pt@KA, and Pt@CaA) were synthesized to construct a spillover hydrogenation model catalyst. In addition, hydrogenation of acetophenone to corresponding 1-phenylethanol as one of the most important hydrogenation reactions to the manufacture of fragrances and pharmaceuticals was selected to be the research object.…”

“…In particular, the extra-framework alkaline-earth metal cations in zeolites exhibit the capability to increase the selectivity of methanol to propylene (MTP) , and promote retro-aldol condensation . Although there have been a few research studies about extra-framework cations in zeolites enhancing catalytic performance, boosting the activity of spillover hydrogenation by ion exchange of zeolites still needs to be further explored …”

“…27−29 For zeolites, introduction of extra-framework metallic cations as Lewis acid sites by an ion exchange method can adjust surface and porous adsorption properties, 30 resulting in a significant increase in the catalytic activities of zeolites, 31−33 which needs further study in spillover hydrogenation. 34 Furthermore, the synergistic effect of cationic Lewis acid sites (LAS) and Brønsted acid sites (BAS) can improve the selectivity to specific types of products. 35 In particular, the extra-framework alkaline-earth metal cations in zeolites exhibit the capability to increase the selectivity of methanol to propylene (MTP) 36,37 and promote retro-aldol condensation.…”