Effects of Promoters on Properties of Cu-Zn-Al Catalyst for Selective Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol

Cu-Zn-Al catalyst was modified by the additives such as Ni and Mn, and the prepared catalyst was employed in the selective catalytic hydrogenation of cinnamaldehyde. The results showed that the addition of Ni could improve catalytic activity significantly, moreover, the improving effect was highest when Zn was replaced by Ni, simultaneously leading to excessive hydrogenation. The Cu-(5%)Mn-Zn-Al catalyst exhibited a higher selectivity of 93.6% for C = O bond to cinnamyl alcohol and hydrogenation activity of 33.0% conversion at 130°C under 1.0 MPa of H2 pressure with the reaction time of 1 h. TPR and XRD characterization showed that Mn promoter was favorable for the growth of Cu0 fine grains on the surface of catalyst, which not only led to steric effect which improved the selectivity for cinnamyl alcohol, but also reduced the numbers of active centers, consequently decreased the reaction rate.

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Bimetallic nickel-lutetium complexes: tuning the properties and catalytic hydrogenation activity of the Ni site by varying the Lu coordination environment

Chemical Science ◽

10.1039/c8sc04712j ◽

2019 ◽

Vol 10 (11) ◽

pp. 3375-3384 ◽

Cited By ~ 18

Author(s):

Bianca L. Ramirez ◽

Prachi Sharma ◽

Reed J. Eisenhart ◽

Laura Gagliardi ◽

Connie C. Lu

Keyword(s):

Catalytic Activity ◽

Catalytic Hydrogenation ◽

Coordination Environment ◽

Hydrogenation Activity ◽

Styrene Hydrogenation

Varying the Lu coordination environment tunes the Ni–Lu interaction and the catalytic activity of the Ni site in styrene hydrogenation.

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Renewable Cyclopentanol From Catalytic Hydrogenation-Rearrangement of Biomass Furfural Over Ruthenium-Molybdenum Bimetallic Catalysts

Frontiers in Bioengineering and Biotechnology ◽

10.3389/fbioe.2020.615235 ◽

2020 ◽

Vol 8 ◽

Author(s):

Shihang Meng ◽

Yujing Weng ◽

Xiaolong Wang ◽

Hongxing Yin ◽

Zhenfei Wang ◽

...

Keyword(s):

Catalytic Hydrogenation ◽

Selective Hydrogenation ◽

Bimetallic Catalysts ◽

Bimetallic Catalyst ◽

Catalytic Performance ◽

Fine Chemicals ◽

Product Selectivity ◽

Rearrangement Product ◽

Hydrogenation Activity ◽

Rearrangement Reaction

Biomass furfural-like compounds are chemicals that cannot be extracted from fossil materials, through which a large number of fine chemicals and fuel additives can be opened up, but one big efficiency problem during the transformation is the accumulation of oligomers. Here, we propose a novel and efficient Ru-Mo bimetallic catalyst for selective hydrogenation-rearrangement of furfural-like compounds. The result showed that an unprecedented rearrangement product selectivity of 89.1% to cyclopentanol was achieved under an optimized reaction condition over a 1%Ru−2.5%Mo/CNT catalyst reduced at 600°C. Subsequent characterization suggested that the catalyst presented with weak acidity and strong hydrogenation activity for the reaction, which not only ensures the smooth hydrogenation-rearrangement reaction but also inhibits the accumulation of furan polymers. These findings provide a convenient strategy to tune the catalytic performance of Mo-based catalysts by controlling the reduction and carburization conditions, which appear to be versatile for the rearrangement of furans and similar compounds.

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Ru–Ni/Al2O3 bimetallic catalysts with high catalytic activity for N-propylcarbazole hydrogenation

Catalysis Science & Technology ◽

10.1039/c9cy02528f ◽

2020 ◽

Vol 10 (7) ◽

pp. 2268-2276 ◽

Cited By ~ 3

Author(s):

Chenguang Li ◽

Ming Yang ◽

Zhenjie Liu ◽

Zhenlin Zhang ◽

Ting Zhu ◽

...

Keyword(s):

Activation Energy ◽

Catalytic Activity ◽

Catalytic Hydrogenation ◽

Bimetallic Catalysts ◽

High Catalytic Activity ◽

Hydrogenation Activity

The as-prepared 5 wt% Ru2.5Ni2.5/Al2O3 catalyst shows the best catalytic hydrogenation activity for NPCZ and the lowest hydrogenation activation energy.

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Selective Hydrogenation of α,β-Unsaturated Aldehydes on Ru-Sn/TiO2 Catalysts

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20031927 ◽

2003 ◽

Vol 68 (10) ◽

pp. 1927-1936 ◽

Cited By ~ 2

Author(s):

Jana Špringerová ◽

Petr Kačer ◽

Jan Hájek ◽

Libor Červený

Keyword(s):

Catalytic Activity ◽

Catalytic System ◽

Catalytic Hydrogenation ◽

Selective Hydrogenation ◽

Carbonyl Compounds ◽

Sol Gel ◽

Positive Influence ◽

Gel Method ◽

Unsaturated Ketones ◽

Unsaturated Aldehydes

Selective catalytic hydrogenation of unsaturated carbonyl compounds was studied on bimetallic Ru-Sn/TiO2 catalysts. The catalysts were prepared by a sol-gel method and co-impregnation in order to evaluate selected parameters (amount of the modifying tin, TiO2 support - commercial, standard sol-gel, modified sol-gel) on their catalytic activity and selectivity. Significant tin effect was proved especially with regard to the positive influence on selectivity. Sol-gel modified TiO2 was found to be the optimum support. Furthermore, the effect of substrate was studied. The suitability of the catalytic system for hydrogenation of unsaturated aldehydes was proved but it is not suitable for selective hydrogenation of unsaturated ketones.

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Transformation of methanol to hydrocarbons over Y zeolites with varying Si/Al ratio

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19871701 ◽

1987 ◽

Vol 52 (7) ◽

pp. 1701-1707 ◽

Cited By ~ 1

Author(s):

Miloslav Křivánek ◽

Nguyen Thiet Dung ◽

Pavel Jírů

Keyword(s):

Catalytic Activity ◽

Reaction Time ◽

Coke Formation ◽

Aliphatic Hydrocarbons ◽

Y Zeolite ◽

Y Zeolites ◽

Methanol To Hydrocarbons

The catalytic activity of Na, H-Y zeolite samples with a varying Si/Al ratio (2·5 to 20) in the transformation of methanol was determined. The amounts of formed individual aliphatic hydrocarbons as function of reaction time were correlated with the amount of Bronsted and Lewis centres on the catalysts. The effect of coke formation on the over-all course of the reaction has been demonstrated.

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Synthesis of tetrazolo[1,5-a]pyrimidine-6-carbonitriles using HMTA-BAIL@MIL-101(Cr) as a superior heterogeneous catalyst

Scientific Reports ◽

10.1038/s41598-021-84379-3 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Mohammad Hossein Abdollahi-Basir ◽

Boshra Mirhosseini-Eshkevari ◽

Farzad Zamani ◽

Mohammad Ali Ghasemzadeh

Keyword(s):

Ionic Liquid ◽

Catalytic Activity ◽

Reaction Time ◽

Metal Organic Framework ◽

One Pot ◽

Short Reaction Time ◽

Three Component Reaction ◽

Metal Organic ◽

Ft Ir ◽

Novel Catalyst

AbstractA one-pot three component reaction of benzaldehydes, 1H-tetrazole-5-amine, and 3-cyanoacetyl indole in the presence of a new hexamethylenetetramine-based ionic liquid/MIL-101(Cr) metal–organic framework as a recyclable catalyst was explored. This novel catalyst, which was fully characterized by XRD, FE-SEM, EDX, FT-IR, TGA, BET, and TEM exhibited outstanding catalytic activity for the preparation of a range of pharmaceutically important tetrazolo[1,5-a]pyrimidine-6-carbonitriles with good to excellent yields in short reaction time.

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