Catalytic Dehydrogenation on Ultradisperse Sn-Promoted Ir Catalysts Supported on MgAl2O4 Prepared by Different Techniques DOI Open Access

Sergio de Miguel,

Jayson Fals, Viviana M. Benítez

et al.

Processes, Journal Year: 2024, Volume and Issue: 12(6), P. 1161 - 1161

Published: June 5, 2024

Ir and IrSn catalysts with different Sn contents (0.5, 0.7 0.9 wt%) were prepared using MgAl2O4 supports synthesized two techniques (the citrate–nitrate combustion coprecipitation methods). Both supports, a spinel structure, presented low acidity good textural properties. However, the support by had higher specific surface area pore volume than one combustion, which would favor dispersion of metals to be deposited. Likewise, during preparation catalytic materials, very interaction was achieved between both confirmed presence sub-nanometer atomic clusters in mono- bimetallic catalysts. Regarding properties, while monometallic Ir/MgAl2O4 samples lead conversion n-butane selectivity towards hydrogenolysis products, addition increases conversion, decreases therefore sharply butenes. Catalysts loadings present better behavior. One roles promoter geometrically modify clusters, drastically decreasing hydrogenolytic activity. This effect, added strong electronic modification sites action Sn, probable Ir-Sn alloy formation, is responsible for high performance these

Language: Английский

Mass-Transfer Enhancement in the CO2 Oxidative Dehydrogenation of Propane over GaN Supported on Zeolite Nanosheets with a Short b-Axis and Hierarchical Pores DOI

Zhan‐Jun Zhu,

Zhen‐Hong He, Yue Tian

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: 14(13), P. 10376 - 10391

Published: June 25, 2024

The CO2 oxidative dehydrogenation of propane (CO2–ODHP) is a highly important reaction for not only producing large amounts propylene but also consuming the resource. GaN/zeolite catalysts deliver preferable activity in reaction. However, similar to Pt- and Cr-based catalysts, there are shortcomings such as poor stability coke accumulation, especially when operated at temperatures higher than 550 °C. Generally, carbon deposition one main reasons catalyst deactivation. limited mass transfer greatly aggravates deposited formation, since precursors could be removed time. In present work, we modified zeolites with short b-axis hierarchical pores, which offer shorter diffusion distance pore-rich structure enhance transfer. Thanks this enhancement, offers an initial conversion 68.0% yield 39.4% propylene, surpassing other reported data. Importantly, showed low loss rate amount carbon, was easily regenerated compared those without or pores. Density functional theory (DFT) calculations situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) confirmed that involves coupling direct reduction via reverse water–gas shift reaction, participates work sheds light on designing efficient CO2–ODHP transfer-boosted strategy and, importantly, expected provide inspiration constructing zeolite

Language: Английский

Citations

4
Density effect of Re1 electronic promoter on the activity of Pt1-catalyzed hydrosilylation DOI

Xunzhu Jiang,

Xiang‐Ting Min, Xiaoli Pan

et al.

Molecular Catalysis, Journal Year: 2025, Volume and Issue: 573, P. 114851 - 114851

Published: Jan. 18, 2025

Language: Английский

Citations

0
Confinement of Atomically Dispersed Ptδ+ Sites in Zinc-Incorporated Silicalite-1 Zeolite for Enhanced Propane Dehydrogenation DOI

Jindong Ji,

Guoli Fan, Lirong Zheng

et al.

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 5858 - 5875

Published: March 26, 2025

Language: Английский

Citations

0
Pt nanoclusters entrapped within Cu-SSZ-13 zeolite for efficient propane dehydrogenation DOI
Zhikang Xu, Mingbin Gao,

Xing Wu

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 162066 - 162066

Published: April 1, 2025

Language: Английский

Citations

0
Tandem hydroformylation/hydrogenation of olefins to alcohols using atomically dispersed bifunctional catalysts DOI
Ying Zhang, Liyang Liu, Ziyue Wang

et al.

Science China Chemistry, Journal Year: 2024, Volume and Issue: 67(11), P. 3706 - 3711

Published: Aug. 16, 2024

Language: Английский

Citations

3
Recent Progress and Strategies on the Design of Zeolite-Based Catalysts for Hydroformylation of Olefins DOI Open Access
M. V. Nenasheva, Д. Н. Горбунов

Catalysts, Journal Year: 2024, Volume and Issue: 14(12), P. 942 - 942

Published: Dec. 20, 2024

Due to their unique structural and mechanical characteristics, zeolites are of great interest as carriers for the design catalysts. This review is focused on progress in development new zeolite-based catalysts hydroformylation. The procedures materials synthesis modification, methods metal introduction, effect catalyst structure activity, selectivity, stability hydroformylation discussed. highlights role up-to-date analytical techniques fine-tuned active selective greatest achievements over past five years considered detail this demonstrate a high potential Future prospects possible directions upcoming studies regarded.

Language: Английский

Citations

2
Catalytic Dehydrogenation on Ultradisperse Sn-Promoted Ir Catalysts Supported on MgAl2O4 Prepared by Different Techniques DOI Open Access

Sergio de Miguel,

Jayson Fals, Viviana M. Benítez

et al.

Processes, Journal Year: 2024, Volume and Issue: 12(6), P. 1161 - 1161

Published: June 5, 2024

Ir and IrSn catalysts with different Sn contents (0.5, 0.7 0.9 wt%) were prepared using MgAl2O4 supports synthesized two techniques (the citrate–nitrate combustion coprecipitation methods). Both supports, a spinel structure, presented low acidity good textural properties. However, the support by had higher specific surface area pore volume than one combustion, which would favor dispersion of metals to be deposited. Likewise, during preparation catalytic materials, very interaction was achieved between both confirmed presence sub-nanometer atomic clusters in mono- bimetallic catalysts. Regarding properties, while monometallic Ir/MgAl2O4 samples lead conversion n-butane selectivity towards hydrogenolysis products, addition increases conversion, decreases therefore sharply butenes. Catalysts loadings present better behavior. One roles promoter geometrically modify clusters, drastically decreasing hydrogenolytic activity. This effect, added strong electronic modification sites action Sn, probable Ir-Sn alloy formation, is responsible for high performance these

Language: Английский

Citations

0