Effect of the Structure of Carbon Support on the Selectivity of Pt/C Catalysts for the Hydrogenation of Acetylene to Ethylene

Чесноков, В. В.; Свинцицкий, Д. А.; Chichkan, A. S.; Parmon, Valentin N.

doi:10.1134/s1995078018030047

Cited by 12 publications

(7 citation statements)

References 28 publications

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“…Typically, the catalytic activity of Pd-based catalysts is further enhanced by the size adjustment, ligand modification and second metal modification [13,14], facilitating the reaction towards path I. In addition, the support for a Pd catalyst also has an important influence on the activity of the catalyst [15,16]. First, the nature of support can affect the dispersibility of the metal particles.…”

Section: Introductionmentioning

confidence: 99%

Pd/MCM-41 catalyst for acetylene hydrogenation to ethylene

Kang

Cheng

2019

R. Soc. open sci.

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This study aims to produce ethylene using the calcium carbide route, acetylene from calcium carbide and then selective hydrogenation of the high-concentration acetylene to ethylene. A series of catalysts with different supports, such as Al2O3, SiO2 and MCM-41, were prepared using the ethylene glycol reduction method and their catalytic properties for high-concentration acetylene hydrogenation of calcium carbide to ethylene were studied by transmission electron microscopy, X-ray powder diffraction and thermogravimetry, among others. The results show that the small particle size and uniform dispersion of palladium (Pd) particles in the Pd/MCM-41 catalyst produced the highest ethylene yield of 62.09%. Then, the conditions for the basic reaction, such as reaction temperature and space velocity, were optimized using MCM-41 as a support. The yield of ethylene after condition optimization was as high as 82.87%, while the loading of Pd was 0.1%.

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Section: Introductionmentioning

confidence: 99%

Pd/MCM-41 catalyst for acetylene hydrogenation to ethylene

Kang

Cheng

2019

R. Soc. open sci.

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“…The results of numerous studies reported in scientific literature indicate that nanostructured catalysts are substantially superior in efficiency to their analogs prepared by known methods containing metallic macroparticles. The synthesis and studies of catalytic systems incorporating platinum nanoparticles appear especially promising for expanding the scope of applicability of platinum catalysts [3][4][5]. The choice of support is important because the interaction between metal and active phase plays crucial role in the comprehensive performance of the catalysts [6].…”

Section: Introductionmentioning

confidence: 99%

“…These impurities impede raw materials storage and processing, especially in the case where the crude material is further subjected to a catalytic process when the impurities can react with catalysts of the polymerization process thus deactivating them or decreasing their activity. The catalysts based on Pd and Pt attract special attention due to their high reactivity in molecular hydrogen activation via dissociative adsorption [1][2][3][4][5][6]. A specific feature of these metals is the ability to absorb predominantly alkynes compared to alkenes [3,14,15,16].…”

Section: Introductionmentioning

confidence: 99%

Platinum – Mesoporous Carbon Nitride Nanocomposites: Synthesis, Characterization and Catalytic Performance in Phenylacetylene Hydrogenation

Akhmedov¹,

Melnikova²,

Nurullayev³

et al. 2023

AChJ

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The platinum nanocomposites were synthesized by chemical reduction of H2PtCl6·6H2O in situ with a methanol—water mixture using mesoporous graphitic carbon nitride as a stabilizing matrix and a catalyst support. The textural, morphological, and optical properties of the obtained platinum – mesoporous carbon nitride composites (Pt/mpg-C3N4) were studied. Pt/mpg-C3N4 has been developed as an effective heterogeneous catalyst for the gas and liquid phase hydrogenation of phenylacetylene. An efficient and versatile approach to the modification of platinum with various organic solvents and ligands for the selective hydrogenation of phenylacetylene to styrene in a flow gas-phase process is pre-sented. The addition of pyridine, piperidine, or morpholine to the starting solution of phenylacetylene in hexane provides 95–100% conversion and 90–92% selectivity to styrene. A sharp increase in the selectivity to styrene without substantial changes in conversion is also observed when THF, ethanol, triethylamine, dioxane, or chloroform are used as diluents. The obtained Pt/mpg-C3N4 composites also demonstrated considerable catalytic activity in the selective hydrogenation of phenylacetylene to styrene at low temperatures in the liquid phase

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“…Traditionally, supported palladium-based catalysts have been extensively investigated in the selective hydrogenation of acetylene for the ability of dissociate hydrogen [7][8][9]. Even though palladium-based catalysts exhibit high acetylene conversion, they also show low selectivity to ethylene simultaneously [10,11]. Compared with Pd-based catalysts, Au-based catalysts show excellent selectivity of ethylene during the hydrogenation process [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

C, N Co-Decorated Alumina-Supported Au Nanoparticles: Enhanced Catalytic Performance for Selective Hydrogenation of Acetylene

Zhang

Zhao

et al. 2020

Top Catal

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The modifications of support for the dispersion and immobilization of gold nanoparticles were examined for the selective hydrogenation of acetylene to ethylene. The catalyst, denoted as Au/CNA, was prepared by the carbonization of C and N atom-containing organic precursors on Al 2 O 3 , which were subsequently used as supports for gold nanoparticles. The TOF value of Au/CNA was five times higher than that of Au/Al 2 O 3 at 250 °C. The carbonization modification of Al 2 O 3 support without N species showed almost no change in catalytic activity. Therefore, the improved catalytic performance of Au/CNA is related to the interactions of the N species on the CNA support with nano-gold particles. From the XPS analysis, electron transfer between gold and C, N co-doped species may play an important role in the high levels of Au active site utilization. This study may provide new avenues for the construction of organic/inorganic composite materials for efficient catalytic hydrogenation applications.

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Effect of the Structure of Carbon Support on the Selectivity of Pt/C Catalysts for the Hydrogenation of Acetylene to Ethylene

Cited by 12 publications

References 28 publications

Pd/MCM-41 catalyst for acetylene hydrogenation to ethylene

Pd/MCM-41 catalyst for acetylene hydrogenation to ethylene

Platinum – Mesoporous Carbon Nitride Nanocomposites: Synthesis, Characterization and Catalytic Performance in Phenylacetylene Hydrogenation

C, N Co-Decorated Alumina-Supported Au Nanoparticles: Enhanced Catalytic Performance for Selective Hydrogenation of Acetylene

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