Boosting propane dehydrogenation of defective S-1 stabilized single-atom Pt and ZnO catalysts via coordination environment regulation DOI
Fuwen Yang, Jie Zhang,

Jinwei Chen

et al.

Nano Research, Journal Year: 2024, Volume and Issue: 17(7), P. 5884 - 5896

Published: April 12, 2024

Language: Английский

Overcoming limitations in propanedehydrogenation by codesigning catalyst-membrane systems DOI
Rawan Almallahi, James Wortman, Suljo Linic

et al.

Science, Journal Year: 2024, Volume and Issue: 383(6689), P. 1325 - 1331

Published: March 21, 2024

Propylene production through propane dehydrogenation (PDH) is endothermic, and high temperatures required to achieve acceptable conversions lead low selectivity severe carbon-induced deactivation of conventional catalysts. We developed a catalyst-membrane system that removes the hydrogen by-product can thus exceed equilibrium limits. In this codesigned system, silica/alumina (SiO

Language: Английский

Citations

29
Confining platinum clusters in indium-modified ZSM-5 zeolite to promote propane dehydrogenation DOI Creative Commons
Yong Yuan, Erwei Huang, Sooyeon Hwang

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Aug. 2, 2024

Designing highly active and stable catalytic sites is often challenging due to the complex synthesis procedure agglomeration of during high-temperature reactions. Here, we report a facile two-step method synthesize Pt clusters confined by In-modified ZSM-5 zeolite. In-situ characterization confirms that In located at extra-framework position as In+, are stabilized In-ZSM-5 The resulting in show excellent propane conversion, propylene selectivity, stability, outperforming monometallic Pt, In, bimetallic PtIn alloys. incorporation In+ neutralizes Brønsted acid inhibit side reactions, well tunes electronic properties facilitate activation desorption. strategy combining precious metal with cation-exchanged zeolites opens avenue develop heterogeneous catalysts for other reaction systems. procedures Here authors present ZSM-5, superior dehydrogenation performance.

Language: Английский

Citations

20
Coke deposition mechanisms of propane dehydrogenation on different sites of Al2O3 supported PtSn catalysts DOI Open Access
Jianhao Jiao, Ye Yang,

Maojie Yuan

et al.

Chemical Synthesis, Journal Year: 2025, Volume and Issue: 5(1)

Published: Jan. 11, 2025

Propane dehydrogenation (PDH) Pt-based catalysts are facing the serious challenge of coke deactivation. The locations would greatly influence formation, while detailed mechanism is not fully explored. Herein, mechanisms on different including Al2O3, Sn, Pt, and Pt-Sn sites were deeply investigated via in situ Fourier transform infrared spectroscopy (FTIR) technology, key factors triggering catalyst deactivation proposed. Excessive propyl species a crucial initial step formation coke, whether at metal or supports. These Al2O3 supports then cyclize to form monocyclic aromatic bicyclic species, those SnOx species. As for supported PtSn catalysts, strong function interaction between Pt trigger complex mechanism. surface with saturated coordination prone deposition, leading rapid stage reaction. However, low-coordination ultra-small size found be highly resistant PDH reaction, which selectively catalytic PDH. Owing metal-support interaction, extensive active hydrogen generated from can regulate precursors Furthermore, effect co-feed deposition also inhibits results higher H/C ratio (3.96) precursors. This study enhance understanding PDH, important designing efficient catalysts.

Language: Английский

Citations

4
Pt-Zn clusters encapsulated in hierarchical MFI zeolite for efficient propane dehydrogenation DOI

Jinyang Lu,

Zhikang Xu, Yuanyuan Yue

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 484, P. 149369 - 149369

Published: Feb. 4, 2024

Language: Английский

Citations

15
Silanol-Stabilized Atomically Dispersed Ptδ+-Ox-Sn Active Sites in Protozeolite for Propane Dehydrogenation DOI
Jialiang Li, Qiang Zhang,

Guangyuan He

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(35), P. 24358 - 24367

Published: Aug. 21, 2024

Crystalline zeolites have been proven to be excellent supports for confining subnanometric metal catalysts boost the propane dehydrogenation (PDH) reaction. However, introduced metallic species may suffer from severe sintering and limited stability during catalytic process, especially when utilizing an industrial impregnation method incorporation. In this study, we developed a new type of support based on amorphous protozeolite (PZ), taking advantage its adjustable silanol chemistry zeolitic microporous characteristic stabilizing atomically dispersed PtSn catalyst via simple, cost-effective coimpregnation process. The combination X-ray absorption spectroscopy, photoelectron in situ diffuse reflectance infrared Fourier transform spectroscopy under CO atmosphere, density functional theory calculations confirmed formation highly active Ptδ+-Ox-Sn PtSn/PZ. PtSn/PZ exhibited high conversion 45.4% propylene selectivity 99% (WHSV= 3.6 h–1, 550 °C), with apparent rate coefficient 565 molC3H6·gPt–1·h–1·bar–1 at WHSV 108 presenting top-level performance among state-of-the-art Pt-based prepared by synthesis methods. determined chemical state species, showing change sites alloy decreasing supports. This work provides general strategy using silanol-rich as various simple also offers effective way fine tailoring silanol-engineered approach.

Language: Английский

Citations

12
Boosting propane dehydrogenation performance over the highly dispersed Co(Ⅱ) sites on ultra-high silica ZSM-5 zeolite DOI
Sixiang Zhai,

Sijia Xing,

Yujun Suo

et al.

Fuel, Journal Year: 2024, Volume and Issue: 366, P. 131429 - 131429

Published: March 11, 2024

Language: Английский

Citations

11
Well-dispersed monolayer CrOx/Silicalite-1 catalysts for efficient propane dehydrogenation DOI
Lili Cai, Yongzheng Zhao, Xiaoyan Tian

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 494, P. 152925 - 152925

Published: June 7, 2024

Language: Английский

Citations

10
Zinc Migration Mediates Isolated [PtFe3] in Zeolite for Propane Dehydrogenation DOI
Mingrui Xu, Bofeng Zhang, Rongrong Zhang

et al.

ACS Catalysis, Journal Year: 2025, Volume and Issue: unknown, P. 3215 - 3226

Published: Feb. 7, 2025

Structural transformation under in situ reaction conditions plays a vital role heterogeneous catalytic performance, especially caused by metal migration. However, the migration of active components often leads to irreversible structural disruption at high temperatures, which could be associated with deactivation catalysts. Here, we report low-melting-point Zn migration-mediated strategy synthesize ultrastable isolated PtFe3 sites anchored MFI zeolite for propane direct dehydrogenation. The optimized catalyst exhibited superior specific activity 36.5 mol C3H6 molPt–1 s–1 propylene selectivity above 99% 550 °C. Moreover, dehydrogenation remained stable after over 400 h on stream low rate constant 0.001 h–1 industrial 580 In characterizations demonstrated that Fe3+ species were conducive rearrangement electronic configuration unoccupied 5d states Pt atoms form electron-deficient sites. This afford insights into dynamic evolution preparation processes.

Language: Английский

Citations

2
Improved C–H Activation in Propane Dehydrogenation Using Zeolite-Stabilized Co–O Moieties DOI
Junling Liu, Jingnan Wang, Yining Zhang

et al.

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(22), P. 14737 - 14745

Published: Nov. 1, 2023

Propane dehydrogenation (PDH) presents a promising alternative to naphtha steam cracking processes for propene production. However, the current commercial catalysts are plagued by toxicity of Cr (VI) and exorbitant cost Pt. We have developed an efficient, eco-friendly, cost-effective catalyst (CoOx@MFI) in which reduction-resistant CoOx clusters embedded situ into zeolite framework. This exhibits good catalytic performances (59.0% propane conversion 93.0% selectivity) PDH reactions, surpassing most Co-based competing with Pt-based ones. Crucially, both spectroscopy theoretical calculations demonstrate that MFI zeolite-stabilized Co–O moieties highly favorable C–H bond activation via O atom as Lewis base, can attach H generate [CoOH]+ intermediate remarkable efficiency.

Language: Английский

Citations

23
Highly stable and selective Pt/TS-1 catalysts for the efficient nonoxidative dehydrogenation of propane DOI

Weilong Hou,

Kehang Lin,

Xiangyu Zhang

et al.

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 474, P. 145648 - 145648

Published: Aug. 25, 2023

Language: Английский

Citations

20