Selective hydrogenation of phenylacetylene over high-energy facets exposed nanotubular alumina supported palladium catalysts

Lv, Jiangang; Wang, Di; Guo, Xuefeng; Ding, Weiping; Yang, Weimin

doi:10.1016/j.catcom.2023.106715

Cited by 5 publications

(2 citation statements)

References 13 publications

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“…Ding and Yang et al synthesized (111) facets exposed alumina as the support for the Pd catalyst. 157,158 Compared with the (100) and (110) facets of alumina, the (111) facets show the highest Al–O density, hydroxyl density, and surface energy, which result in the strongest interaction between the Pd cluster and alumina support, leading to high and stability dispersed Pd cluster (Fig. 22).…”

Section: Some Promising Applications Of Alumina-supported Pd-based Ca...mentioning

confidence: 99%

Advances in morphology-controlled alumina and its supported Pd catalysts: synthesis and applications

Yang,

Miao,

Wang

et al. 2024

Chem. Soc. Rev.

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Section: Some Promising Applications Of Alumina-supported Pd-based Ca...mentioning

confidence: 99%

Advances in morphology-controlled alumina and its supported Pd catalysts: synthesis and applications

Yang,

Miao,

Wang

et al. 2024

Chem. Soc. Rev.

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“…Zheng et al [10] also worked with Pd, but in their case, they demonstrated that alloyed Pd-Pb on precipitated calcium carbonate (PCC) supports could be an upgraded version of the Lindlar catalyst that provides promising results for the semi-hydrogenation of phenylacetylene to styrene. Further, Lv et al [11] developed a novel alumina-supported Pd catalyst for the selective hydrogenation of phenylacetylene and less production of the byproduct ethylbenzene given the good dispersion of Pd and strong metal-support interaction capable of creating more active sites for hydrogenation and facilitating the desorption of the alkene.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Semi-Hydrogenation of Alkynes: A Game of Kinetics, Selectivity and Critical Timing

Cely-Pinto,

Wang,

Scaiano

2023

Nanomaterials

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The semi-hydrogenation reaction of alkynes is important in the fine chemicals and pharmaceutical industries, and it is thus important to find catalytic processes that will drive the reaction efficiently and at a low cost. The real challenge is to drive the alkyne-to-alkene reaction while avoiding over-hydrogenation to the saturated alkane moiety. The problem is more difficult when dealing with aromatic substitution at the alkyne center. Simple photocatalysts based on Palladium tend to proceed to the alkane, and stopping at the alkene with good selectivity requires very precise timing with basically no timing tolerance. We report here that the goal of high conversion with high selectivity could be achieved with TiO2-supported copper (Cu@TiO2), although with slower kinetics than for Pd@TiO2. A novel bimetallic catalyst, namely, CuPd@TiO2 (0.8% Cu and 0.05% Pd), with methanol as the hydrogen source could improve the kinetics by 50% with respect to Cu@TiO2, while achieving selectivities over 95% and with exceptional timing tolerance. Further, the low Palladium content minimizes its use, as Palladium is regarded as an element at risk of depletion.

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A kinetics study on continuous dehydrogenation of dodecahydro‐N‐ethylcarbazole

Wang,

Li,

et al. 2024

Asia-Pacific J Chem Eng

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Liquid organic hydrogen carrier (LOHC) technology has unique advantages in hydrogen storage and transportation. However, the lack of research on the continuous dehydrogenation process of LOHCs has hindered the design and application of industrial dehydrogenation processes. In this work, a highly active dehydrogenation catalyst 1.5 wt% Pd/activated carbon (Pd/C) and a commercial catalyst 5 wt% Pd/Al2O3 were used for the continuous dehydrogenation of dodecahydro‐N‐ethylcarbazole (12H‐NEC). Based on a tubular reactor and lab‐scale apparatus, 1.5 wt% Pd/C catalyst achieved a maximum dehydrogenation conversion of 98.3% and a maximum NEC selectivity of 95.3%, while dehydrogenation conversion and NEC selectivity with 5 wt% Pd/Al2O3 were 98.3% and 97.6%, respectively. It showed the equally excellent performance between Pd/C and Pd/Al2O3, and the former has less Pd loading than the latter, with the potential of reducing the production cost of the dehydrogenation catalyst. The dehydrogenation results also indicated the difference in catalytic performance between the two kinds of catalysts. The obtained kinetics data were analyzed, and the dynamics of continuous dehydrogenation were studied to provide fundamental information for dehydrogenation scale‐up.

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Selective hydrogenation of phenylacetylene over high-energy facets exposed nanotubular alumina supported palladium catalysts

Cited by 5 publications

References 13 publications

Advances in morphology-controlled alumina and its supported Pd catalysts: synthesis and applications

Advances in morphology-controlled alumina and its supported Pd catalysts: synthesis and applications

Photocatalytic Semi-Hydrogenation of Alkynes: A Game of Kinetics, Selectivity and Critical Timing

A kinetics study on continuous dehydrogenation of dodecahydro‐N‐ethylcarbazole

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