Selective hydrogenation of acetylene on SiO2-supported Ni-Ga alloy and intermetallic compound

Wang, Lei; Li, Fengxu; Chen, Yanjun; Chen, Jixiang

doi:10.1016/j.jechem.2018.02.001

Cited by 52 publications

(37 citation statements)

References 62 publications

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“…(c), the NiZnAl and NiZn‐HY hybrid catalysts gave lower selectivities to C 6 –C 10 hydrocarbons ( S C6–C10 , <2.9%) than Ni/HY ( S C6–C10 of 77.3%). The C 6 –C 10 hydrocarbons were derived from C–C hydrogenolysis, which can be suppressed on Ni‐based alloy and IMC . As indicated in previous work, the geometric effect of Zn on Ni in Ni–Zn alloy and IMC gives rise to lower activity for C–C hydrogenolysis.…”

Section: Resultsmentioning

confidence: 66%

“…The C 6 -C 10 hydrocarbons were derived from C-C hydrogenolysis, which can be suppressed on Ni-based alloy and IMC. 18,43,44 As indicated in previous work, 18 the geometric effect of Zn on Ni in Ni-Zn alloy and IMC gives rise to lower activity for C-C hydrogenolysis. Moreover, Ni-Zn IMC showed lower activity for C-C bond hydrogenolysis than Ni-Zn alloy, and the activity decreased with the decrease in Ni/Zn atomic ratios in the alloy.…”

Section: Catalytic Activitymentioning

confidence: 79%

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Catalytic deoxygenation of methyl laurate as a model compound to hydrocarbons on hybrid catalysts composed of Ni–Zn alloy and HY zeolite

Pan

Wang

Chen

2019

J of Chemical Tech & Biotech

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BACKGROUND The deoxygenation of renewable vegetable oils in a hydrogen atmosphere is feasible for yielding diesel‐like hydrocarbons. In this work, hybrid catalysts composed of Ni–Zn alloy and HY zeolite were designed to achieve a highly efficient deoxygenation. RESULTS NiZn‐LDH‐HY, NiZn‐O‐HY and NiZn/HY hybrid catalysts composed of Ni‐rich Ni–Zn alloy and HY zeolite were prepared by various methods. NiZn/HY prepared by a deposition–precipitation method gave higher Ni dispersion than NiZn‐LDH‐HY and NiZn‐O‐HY obtained by mortar milling. In the deoxygenation of methyl laurate as a model compound at 330 °C and 3.0 MPa, the hybrid catalysts led to higher reaction rates (ca 9.0 × 10−5 mol g−1Ni s−1) than NiZnAl not combined with HY (2.5 × 10−5 mol g−1Ni s−1). Particularly, NiZn/HY gave higher total selectivity to C11 and C12 hydrocarbons (80.2%) than NiZn‐O‐HY and NiZn‐LDH‐HY (47.4 and 41.5%, respectively). CONCLUSIONS This work provides an approach for preparing highly efficient catalysts for deoxygenation of esters to hydrocarbons by combining Ni–Zn alloy and HY zeolite. We deem that the closer proximity between metallic Ni and acid sites facilitates the deoxygenation via a synergetic effect between the two kinds of sites. © 2019 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 66%

Section: Catalytic Activitymentioning

confidence: 79%

Catalytic deoxygenation of methyl laurate as a model compound to hydrocarbons on hybrid catalysts composed of Ni–Zn alloy and HY zeolite

Pan

Wang

Chen

2019

J of Chemical Tech & Biotech

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“…It has been reported that Ni-M (M = Ga, Sn, In and Zn) and Pd-Ga IMCs display excellent performance in the selective hydrogenation of acetylene [32][33][34] , phenylacetylene [35,36] and unsaturated aldehydes [37] , the CO 2 hydrogenation to methanol [38,39] as well as the deoxygenation of methyl laurate. As indicated by X-ray absorption fine-structure characterization and density functional theory (DFT) calculations [33,36] , several Ni-Ga IMCs (e.g., Ni 3 Ga, Ni 5 Ga 3 and NiGa) differ in the geometric and electronic properties. The adjustable composition and structure in Ni-Ga IMCs provide an opportunity to develop a highly efficient catalyst and to explore the relationship between catalyst structure and performance, such as in the selective hydrogenation of phenylacetylene [33,36] .…”

Section: Introductionmentioning

confidence: 99%

“…As indicated by X-ray absorption fine-structure characterization and density functional theory (DFT) calculations [33,36] , several Ni-Ga IMCs (e.g., Ni 3 Ga, Ni 5 Ga 3 and NiGa) differ in the geometric and electronic properties. The adjustable composition and structure in Ni-Ga IMCs provide an opportunity to develop a highly efficient catalyst and to explore the relationship between catalyst structure and performance, such as in the selective hydrogenation of phenylacetylene [33,36] . Notably, in Ni-Ga IMCs, the Ga atoms bear a small amount of positive charge due to an electron transfer from Ga to Ni [36] , and they may act as Lewis acid sites to adsorb oxygen in ester.…”

Section: Introductionmentioning

confidence: 99%

Remarkably reducing carbon loss and H2 consumption on Ni–Ga intermetallic compounds in deoxygenation of methyl esters to hydrocarbons

Zhao

Zheng

Chen

2020

Journal of Energy Chemistry

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“…Bimetallic and multi-metallic catalysts have gained much attention in recent years [50][51][52]. Proper synthesis and characterization of uniformly dispersed supported bi-metallics could provide a synergistic effect that usually enhances the catalytic activity and/or selectivity toward one of the products [52][53][54].…”

Section: Introductionmentioning

confidence: 99%

Synergetic Impact of Secondary Metal Oxides of Cr-M/MCM41 Catalyst Nanoparticles for Ethane Oxidative Dehydrogenation Using Carbon Dioxide

et al. 2019

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Oxidative dehydrogenation of alkanes to alkenes by a mild oxidant such as carbon dioxide is an active area of research. A series of MCM41-supported bimetallic oxide catalysts containing chromium oxide in addition to metal oxides (Ce, Co, Zn, V, Nb, and Mo) has been prepared. The binary catalysts have Cr metal oxide incorporated into MCM41 structure while the other oxides are either incorporated with Cr or impregnated on the MCM41 surface. The synthesized catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), N2 sorption, scanning electron microscopy (SEM), hydrogen temperature programmed reduction (H2-TPR), and Diffuse reflectance UV–vis spectroscopy (DRS). The catalytic activity of Cr(4)-M(4)/MCM-41 catalysts in the dehydrogenation of ethane with CO2 was investigated. The textural properties of the synthesized samples showed that the addition of the bimetallic oxides did not disturb the mesoporous structure of MCM41 and the prepared catalysts exhibited a high BET surface area; however, the lowest surface area was recorded for Cr(4)-Mo(4)/MCM41 catalyst at 701 m2/g. Among the prepared catalysts, H2-TPR profile of Cr(4)-Ce(4)/MCM41 revealed the increase in the concentration of Cr6+ species which interacted with the framework of siliceous support. On the other hand, H2-TPR profiles of Cr(4)-Co(4)/MCM41 showed wide reduction peaks centered at 400 °C which is ascribed to reduction of Cr6+ to Cr3+ species and Co3O4 to metallic Co. At the same time, Cr(4)-Mo(4)/MCM41 and Cr(4)-V(4)/MCM41 exhibited higher temperature reduction peaks, indicating these two catalysts require higher activation temperatures. The synergy between the Cr with Zn or Nb metals reduced the concentration of Cr6+ species which is reflected in their catalytic performance. Cr(4)-Ce(4)/MCM41 recorded the highest catalytic activity toward ethylene production where the ethane conversion and ethylene yield were 37.9% and 35.1%, respectively.

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Selective hydrogenation of acetylene on SiO2-supported Ni-Ga alloy and intermetallic compound

Cited by 52 publications

References 62 publications

Catalytic deoxygenation of methyl laurate as a model compound to hydrocarbons on hybrid catalysts composed of Ni–Zn alloy and HY zeolite

Catalytic deoxygenation of methyl laurate as a model compound to hydrocarbons on hybrid catalysts composed of Ni–Zn alloy and HY zeolite

Remarkably reducing carbon loss and H2 consumption on Ni–Ga intermetallic compounds in deoxygenation of methyl esters to hydrocarbons

Synergetic Impact of Secondary Metal Oxides of Cr-M/MCM41 Catalyst Nanoparticles for Ethane Oxidative Dehydrogenation Using Carbon Dioxide

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