Highly Enhanced Catalytic Stability of Copper by the Synergistic Effect of Porous Hierarchy and Alloying for Selective Hydrogenation Reaction

Supported copper has a great potential for replacing the commercial palladium-based catalysts in the field of selective alkynes/alkadienes hydrogenation due to its excellent alkene selectivity and relatively high activity. However, fatally, it has a low catalytic stability owing to the rapid oligomerization of alkenes on the copper surface. In this study, 2.5 wt% Cu catalysts with various Cu:Zn ratios and supported on hierarchically porous alumina (HA) were designed and synthesized by deposition–precipitation with urea. Macropores (with diameters of 1 μm) and mesopores (with diameters of 3.5 nm) were introduced by the hydrolysis of metal alkoxides. After in situ activation at 350 °C, the catalytic stability of Cu was highly enhanced, with a limited effect on the catalytic activity and alkene selectivity. The time needed for losing 10% butadiene conversion for Cu1Zn3/HA was ~40 h, which is 20 times higher than that found for Cu/HA (~2 h), and 160 times higher than that found for Cu/bulky alumina (0.25 h). It was found that this type of enhancement in catalytic stability was mainly due to the rapid mass transportation in hierarchically porous structure (i.e., four times higher than that in bulky commercial alumina) and the well-dispersed copper active site modified by Zn, with identification by STEM–HAADF coupled with EDX. This study offers a universal way to optimize the catalytic stability of selective hydrogenation reactions.

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Catalytic properties of nanocarbon materials in reaction of selective hydrogenation of acetylene

NEW FUNCTIONAL SUBSTANCES AND MATERIALS FOR CHEMICAL ENGINEERING ◽

10.15407/akademperiodyka.444.280 ◽

2021 ◽

pp. 280-295

Author(s):

Igor B. Bychko ◽

◽

Alexander A. Abakumov ◽

Andrii I. Trypolskyi ◽

Peter E. Strizhak ◽

...

Keyword(s):

Catalytic Activity ◽

Selective Hydrogenation ◽

Noble Metals ◽

Carbon Nanomaterials ◽

Catalytic Properties ◽

Hydrogenation Reaction ◽

Gas Phases ◽

Selective Hydrogenation Of Acetylene ◽

Nanocarbon Materials ◽

Hydrogenation Reactions

The chapter presents the results of studies of the catalytic properties of nanocarbon materials based on carbon nanotubes and reduced graphene oxide in the hydrogenation of ethylene, acetylene and ethylene-acetylene mixture by molecular hydrogen at atmosphere pressure. The current state of scientific approaches to the creation of nanocarbon metal-free catalysts for the hydrogenation reactions in both liquid and gas phases is presented. A possible nature of active center of the hydrogenation reaction located on the surface of the nanocarbon material is discussed. It is shown that the catalytic activity of the nanocarbon materials is not associated with metal impurities. The correlation between the structural characteristics of carbon nanomaterials and their catalytic properties in the hydrogenation reactions of unsaturated hydrocarbons is demonstrated. A comparative analysis of the catalytic activity of nanocarbon materials and catalysts that contain noble metals in the hydrogenation reaction of acetylene is presented. Finally, the fundamental possibility of creating a nanocarbon catalyst for selective hydrogenation of acetylene in excess ethylene is shown.

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Sonochemical synthesis of Zn-promoted porous MgO-supported lamellar Cu catalysts for selective hydrogenation of dimethyl oxalate to ethanol and their long-term stability

New Journal of Chemistry ◽

10.1039/c8nj03766c ◽

2018 ◽

Vol 42 (21) ◽

pp. 17553-17562 ◽

Cited By ~ 2

Author(s):

Mohamed Abbas ◽

Juan Zhang ◽

Zheng Chen ◽

Jiangang Chen

Keyword(s):

Selective Hydrogenation ◽

Hydrogenation Reaction ◽

Environmentally Benign ◽

Sonochemical Synthesis ◽

Dimethyl Oxalate ◽

Term Stability ◽

Long Term Stability ◽

Cu Catalysts

Zn-doped lamellar Cu nanocrystals supported on MgO NPs catalyst was developed and employed as novel and robust catalyst for the production of Ethanol from the environmentally benign hydrogenation reaction of dimethyl oxalate.

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Catalytic asymmetric hydrogenation reaction by in situ formed ultra-fine metal nanoparticles in live thermophilic hydrogen-producing bacteria

Nanoscale ◽

10.1039/d1nr00327e ◽

2021 ◽

Author(s):

Wei Bing ◽

Faming Wang ◽

Yuhuan Sun ◽

Jinsong Ren ◽

Xiaogang Qu

Keyword(s):

Metal Nanoparticles ◽

Catalytic Hydrogenation ◽

Asymmetric Hydrogenation ◽

Environmentally Friendly ◽

Hydrogenation Reaction ◽

Highly Efficient ◽

Hydrogenation Reactions ◽

Live Bacteria ◽

Catalytic Asymmetric Hydrogenation

An environmentally friendly biomimetic strategy has been presented and validated for the catalytic hydrogenation reaction in live bacteria. In situ formed ultra-fine metal nanoparticles can realize highly efficient asymmetric hydrogenation reactions.

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Versatile Hollow ZSM-5 Nanoreactors Loaded with Tailorable Metal Catalysts for Selective Hydrogenation Reactions

ACS Applied Materials & Interfaces ◽

10.1021/acsami.1c01916 ◽

2021 ◽

Author(s):

Bowen Li ◽

Kelvin Mingyao Kwok ◽

Hua Chun Zeng

Keyword(s):

Selective Hydrogenation ◽

Metal Catalysts ◽

Hydrogenation Reactions

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Ceria-Based Catalysts for Selective Hydrogenation Reactions: A Critical Review

Catalysis Surveys from Asia ◽

10.1007/s10563-020-09319-z ◽

2021 ◽

Author(s):

Kourosh Razmgar ◽

Mohammednoor Altarawneh ◽

Ibukun Oluwoye ◽

Gamini Senanayake

Keyword(s):

Selective Hydrogenation ◽

Critical Review ◽

Hydrogenation Reactions

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Selective Hydrogenation Reactions

SpringerBriefs in Molecular Science - Biomass Processing over Gold Catalysts ◽

10.1007/978-3-319-00906-3_5 ◽

2013 ◽

pp. 39-40 ◽

Cited By ~ 1

Author(s):

Olga A. Simakova ◽

Robert J. Davis ◽

Dmitry Yu. Murzin

Keyword(s):

Selective Hydrogenation ◽

Hydrogenation Reactions

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Selective hydrogenation of furfural using a membrane reactor

Energy & Environmental Science ◽

10.1039/d1ee02818a ◽

2021 ◽

Author(s):

Roxanna S Delima ◽

Mia Stankovic ◽

Ben P. MacLeod ◽

Arthur G. Fink ◽

Michael B. Rooney ◽

...

Keyword(s):

Selective Hydrogenation ◽

Membrane Reactor ◽

Membrane Reactors ◽

Hydrogen Formation ◽

Palladium Membrane ◽

Hydrogenation Reactions

Electrocatalytic palladium membrane reactors (ePMRs) use electricity and water to drive hydrogenation reactions without ever forming H2 gas. In these reactors, a palladium membrane physically separates electrochemical hydrogen formation in...

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