Bimetallic Ni-Zn site anchored in siliceous zeolite framework for synergistically boosting propane dehydrogenation

Huang, Chengming; Han, Dingmei; Guan, Linjie; Zhu, Linhua; Mei, Yi; He, Dedong; Zu, Yun

doi:10.1016/j.fuel.2021.121790

Cited by 47 publications

(26 citation statements)

References 54 publications

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“…Moreover, zeolitesupported non-noble bimetal catalysts (e.g., Ni-Zn@S-1 and Zn-In/HZSM-5) have also been developed with attractive activity in the PDH reaction, especially outstanding propylene selectivity. 95,96 In the next few paragraphs, we introduce these zeolite-supported bimetal catalysts in detail.…”

Section: Zeolite-supported Bimetal Catalystsmentioning

confidence: 99%

“…Besides zeolite-supported Pt-based bimetallic catalysts, some zeolite-supported non-noble bi-metal catalysts have also been developed for PDH reactions. 59,95,96 Although some non-noble metals possess activity for propane dehydrogenation, sometimes their propylene selectivity is not satisfactory due to their strong tendency towards C-C hydrogenolysis. The fabrication of non-noble bimetal systems can modify the electronic state of each non-noble metal species and suppress the hydrogenolysis of C-C bonds of propane, resulting in high activity in PDH reactions.…”

Section: Zeolite-supported Non-noble Bimetal Catalystsmentioning

confidence: 99%

“…Zu and co-workers reported Ni-Zn bimetallic catalysts located in the silicalite-1 framework via a ligand-protected strategy using [Ni(EDA) 2 ](NO 3 ) 2 and [Zn(EDA) 3 ](NO 3 ) 2 (EDA = triethylamine) as precursors. 95 Based on Fourier transform infrared spectroscopy (FTIR), a new IR absorption band at 1452 cm −1 was observed for the representative monometallic 47 Copyright 2021, Nature Publishing Group. (f and g) HAADF-STEM images of representative sodium-free mesoporous zeolite-supported Pt-Y alloys and (h) EDS line-scan profile of a Pt-Y nanoparticle.…”

Section: Zeolite-supported Non-noble Bimetal Catalystsmentioning

confidence: 99%

“…Zu and co-workers reported Ni–Zn bimetallic catalysts located in the silicalite-1 framework via a ligand-protected strategy using [Ni(EDA) 2 ](NO 3 ) 2 and [Zn(EDA) 3 ](NO 3 ) 2 (EDA = triethylamine) as precursors. 95 Based on Fourier transform infrared spectroscopy (FTIR), a new IR absorption band at 1452 cm −1 was observed for the representative monometallic Ni–S-1 and Zn–S-1, and bimetallic 0.2Ni0.06Zn–S-1 compared with pure zeolites, indicating that the Ni and Zn species were anchored in the zeolites. CO-FTIR, H 2 -TPR, H 2 pulse chemisorption, XPS, and UV-Vis measurements revealed that the Ni and Zn were in the form of divalent species anchored on the zeolite framework, and the introduction of Zn species could enhance the electronic density of Ni species.…”

Section: Zeolite-supported Bimetal Catalystsmentioning

confidence: 99%

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Advances in zeolite-supported metal catalysts for propane dehydrogenation

Sun

2022

Inorg. Chem. Front.

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Section: Zeolite-supported Bimetal Catalystsmentioning

confidence: 99%

Section: Zeolite-supported Non-noble Bimetal Catalystsmentioning

confidence: 99%

Section: Zeolite-supported Non-noble Bimetal Catalystsmentioning

confidence: 99%

Section: Zeolite-supported Bimetal Catalystsmentioning

confidence: 99%

See 2 more Smart Citations

Advances in zeolite-supported metal catalysts for propane dehydrogenation

Sun

2022

Inorg. Chem. Front.

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“…Zeolites are important catalysts and adsorbents that are widely used by many fields such as oil refining, petrochemical conversions and environmental remediation [1][2][3]. Both the chemical and physical properties of zeolites (such as acid sites and pore structures) are crucial for their performance in different applications [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Molecular Insights into Adsorption and Diffusion Mechanism of N-Hexane in MFI Zeolites with Different Si-to-Al Ratios and Counterions

et al. 2022

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The effect of the silicon to aluminum ratio (SAR) and alkali metal cations on adsorption and diffusion properties of ZSM-5 and silicate-1 zeolites was investigated using n-hexane as the model probe via giant canonical Monte Carlo (GCMC) and molecular dynamics (MD) simulations. A wide range of SAR was considered in this study to explore the possible adsorption sites in the zeolites. The findings show that, at 298 K and 423 K, adsorption and diffusion of n-hexane on/in low SAR (≤50) H-ZSM-5 models were promoted due to the preferable distribution of n-hexane in straight channels and enhanced interaction between protons and n-hexane molecules (about 24 kcal·mol−1). In alkali metal cation (i.e., Na+ and K+) exchanged ZSM-5, the alkali metal cations affected transport of molecules, which led to significant differences in their adsorption and diffusion properties compared to HZSM-5. In the Na+ and K+ systems, lower saturated adsorption capacities were predicted compared to that of silicate-1, which could be attributed to the decrease in effective void size posed by alkali–metal cations. In addition, simulation results also suggested that the T9 and T3 are the most likely sites for n-hexane adsorption, followed by T2, T5, and T10. Findings of the work can be beneficial to the rational design of high-performance zeolite catalysts for n-hexane conversion.

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Regulation of Active ZnO Species on Si‐based Supports with Diverse Textural Properties for Efficient Propane Dehydrogenation

Yang

Zhang

Shi³

et al. 2023

ChemCatChem

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Propylene is deemed as a kind of key raw materials with significant value in industrial production. Highly dispersed Zn species are served as active sites in catalyzing propane dehydrogenation reaction (PDH). More importantly, the morphology and textural properties of Si-based support exert the great influence on the formation of active Zn species. Herein, active Zn species were dispersed on macroporous commercial SiO 2 , mesoporous siliceous materials (SBA-15, MCF, DMSN, KIT-6), and microporous silicalite-1 (S-1), respectively. Characterization result indicated that the dispersed active ZnO species were prone to be formed on S-1, which could be attributed to the confinement effect of micropores in S-1 and the abundant Si-OH groups interacted with Zn 2 + species. As a result, the optimal ZnO A /S-1 catalyst exhibited superior catalytic activity (propane conversion of 40.4 %, propylene selectivity of 96.0 %, 550 °C, WHSV = 0.47 h À 1 ) during PDH process. Furthermore, the relatively considerable performance of ZnO A /S-1 catalysts could help to offer a guidance on the design of efficient and low-cost catalysts for PDH reaction.

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Bimetallic Ni-Zn site anchored in siliceous zeolite framework for synergistically boosting propane dehydrogenation

Cited by 47 publications

References 54 publications

Advances in zeolite-supported metal catalysts for propane dehydrogenation

Advances in zeolite-supported metal catalysts for propane dehydrogenation

Molecular Insights into Adsorption and Diffusion Mechanism of N-Hexane in MFI Zeolites with Different Si-to-Al Ratios and Counterions

Regulation of Active ZnO Species on Si‐based Supports with Diverse Textural Properties for Efficient Propane Dehydrogenation

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