The effect of MgO in Pd/Al<sub>2</sub>O<sub>3</sub>–MgO catalyst on a selective hydrogenation reaction

Yang, Zhou; Wang, Ru; Liu, Hongji; Chen, Zhou; Hu, Xiaoli; Sun, Limin; Lai, Weikun; Dong, Yunyun; Fang, Weiping; Yi, Xiaodong

doi:10.1039/d3cy01086d

Catal. Sci. Technol.

2024

DOI: 10.1039/d3cy01086d

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The effect of MgO in Pd/Al₂O₃–MgO catalyst on a selective hydrogenation reaction

Zhou Yang,

Ru Wang,

Hongji Liu

et al.

Abstract: Selective hydrogenation is a significantly important catalytic process in many industrial manufacture, where Pd based catalysts are the most common used. Here, the surface properties of γ-Al2O3 were modified by...

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Cited by 3 publications

References 35 publications

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One-pot synthesis of porous carbon nanospheres supported CuPd alloy catalysts for the hydrogenation-dechlorination of 2,3,6-trichloropyridine

Zhang,

Liu,

Pan

et al. 2024

Applied Catalysis A: General

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One-pot synthesis of porous carbon nanospheres supported CuPd alloy catalysts for the hydrogenation-dechlorination of 2,3,6-trichloropyridine

Zhang,

Liu,

Pan

et al. 2024

Applied Catalysis A: General

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Support Screening to Shape Propane Dehydrogenation SnPt-Based Catalysts

Festa,

Serrano-Lotina,

Meloni

et al. 2024

Ind. Eng. Chem. Res.

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Propane dehydrogenation reaction (PDH) is an extremely attractive way to produce propylene; however, the catalysts often lead to byproduct formation and suffer from deactivation. This research focuses on the development of efficient Pt/Sn-based shaped catalysts by utilizing Mg-modified mesoporous silica, sepiolite (natural SiMgO x mesoporous clay), and sepiolite/bentonite/alumina as supports with the aim of achieving superior stability and selectivity for industrial propylene production by PDH. The catalysts were prepared by sequential impregnation of the supports with the corresponding solutions of tin chloride and platinum chloride, by obtaining a nominal loading of 0.7 wt % of Sn and 0.5 wt % of Pt. A range of analytical techniques were used to characterize the catalysts, including X-ray diffraction, nitrogen physisorption isotherms, Hg intrusion porosimetry, thermogravimetric analyses, transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. The basicity of the catalysts was assessed using carbon dioxide temperature-programmed desorption (CO2-TPD). The results confirm that the support material plays a critical role in catalyst performance; in particular, the presence of weak basic sites, due to magnesium addition, improved selectivity to propylene and reduced coke formation. Catalytic pellets of Sn–Pt supported on macroporous sepiolite or sepiolite and bentonite-modified mesoporous alumina performed comparably with propane conversion very close to thermodynamic equilibrium and selectivity to propylene above 95%. The latter support led to improved stability and was regenerated at milder temperatures, making it suitable for industrial applications.

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Carbon Defects on N-Doped Carbon Promote Catalytic Activity of Pd Nanoparticles for the Selective Hydrogenation of Quinoline

Zhou,

Ding,

Chen

et al. 2024

ACS Appl. Nano Mater.

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The activation process is a key step in preparing porous carbon. Herein, three kinds of green activators were separately used to successfully prepare N-doped porous carbons through a two-step strategy: hydrothermal carbonization and chemical activation using microcrystalline cellulose as the carbon source and urea as the nitrogen source. Palladium was deposited on these N-doped microcrystalline cellulose-based carbons (NMC-X, where X represents the activator) via a traditional deposition–precipitation method, and the resulting Pd nanoparticle catalysts (Pd/NMC-X) showed high activity in the selective hydrogenation of quinoline under mild conditions, particularly Pd/NMC-ZC (ZC, zinc carbonate), which achieved complete conversion of quinoline within 100 min at 40 °C and 4 atm H2. Characterization results suggest that the high activity of Pd/NMC-ZC is mainly attributed to the special electronic structure of its Pd species, particularly the distribution of valence states and reducibility of Pd and the high hydrogen spillover capacity between Pd and NMC-ZC. The chemical activation by ZC leads to the formation of multiple defect sites on the carbon skeleton, modifying the carbon surface properties to enhance hydrogen spillover. This also provides an excellent environment for Pd nanoparticle anchoring, thus increasing the Pd-support interactions and regulating the electronic structure of Pd.

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The effect of MgO in Pd/Al₂O₃–MgO catalyst on a selective hydrogenation reaction

Abstract: Selective hydrogenation is a significantly important catalytic process in many industrial manufacture, where Pd based catalysts are the most common used. Here, the surface properties of γ-Al2O3 were modified by...

Cited by 3 publications

References 35 publications

One-pot synthesis of porous carbon nanospheres supported CuPd alloy catalysts for the hydrogenation-dechlorination of 2,3,6-trichloropyridine

One-pot synthesis of porous carbon nanospheres supported CuPd alloy catalysts for the hydrogenation-dechlorination of 2,3,6-trichloropyridine

Support Screening to Shape Propane Dehydrogenation SnPt-Based Catalysts

Carbon Defects on N-Doped Carbon Promote Catalytic Activity of Pd Nanoparticles for the Selective Hydrogenation of Quinoline

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The effect of MgO in Pd/Al2O3–MgO catalyst on a selective hydrogenation reaction

Abstract: Selective hydrogenation is a significantly important catalytic process in many industrial manufacture, where Pd based catalysts are the most common used. Here, the surface properties of γ-Al2O3 were modified by...

Cited by 3 publications

References 35 publications

One-pot synthesis of porous carbon nanospheres supported CuPd alloy catalysts for the hydrogenation-dechlorination of 2,3,6-trichloropyridine

One-pot synthesis of porous carbon nanospheres supported CuPd alloy catalysts for the hydrogenation-dechlorination of 2,3,6-trichloropyridine

Support Screening to Shape Propane Dehydrogenation SnPt-Based Catalysts

Carbon Defects on N-Doped Carbon Promote Catalytic Activity of Pd Nanoparticles for the Selective Hydrogenation of Quinoline

Contact Info

Product

Resources

About

The effect of MgO in Pd/Al₂O₃–MgO catalyst on a selective hydrogenation reaction