Construction the Ni@Carbon nanostructure with dual-reaction surfaces for the selective hydrogenation reaction

2019 ◽  
Vol 489 ◽  
pp. 786-795 ◽  
Author(s):  
Shuo Li ◽  
Xianlang Chen ◽  
Jing Wang ◽  
Nan Yao ◽  
Jianguo Wang ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Hydrogenation Reaction ◽  
Carbon Nanostructure ◽  
Reaction Surfaces

scholarly journals Bimetallic Au–Pd alloy nanoparticles supported on MIL-101(Cr) as highly efficient catalysts for selective hydrogenation of 1,3-butadiene

RSC Advances ◽  
2020 ◽  
Vol 10 (55) ◽  
pp. 33417-33427
Author(s):  
Lili Liu ◽  
Xiaojing Zhou ◽  
Luxia Guo ◽  
Shijuan Yan ◽  
Yingjie Li ◽  
...  
Keyword(s):  
High Activity ◽  
Selective Hydrogenation ◽  
Hydrogenation Reaction ◽  
Alloy Nanoparticles ◽  
Highly Efficient ◽  
Alloy Particles ◽  
Pd Alloy ◽  
Butadiene Hydrogenation

Bimetallic Au–Pd alloy particles stabilized by MIL-101(Cr) showed high activity and butene selectivity for 1,3-butadiene hydrogenation reaction.

Selective hydrogenation of CO2gas to formic acid over nanostructured Ru-TiO2catalysts

RSC Advances ◽  
2016 ◽  
Vol 6 (48) ◽  
pp. 42297-42306 ◽  
Author(s):  
Praveenkumar Ramprakash Upadhyay ◽  
Vivek Srivastava
Keyword(s):  
Ionic Liquid ◽  
Formic Acid ◽  
Selective Hydrogenation ◽  
Hydrogenation Reaction

Ionic-liquid-mediated TiO2supported Ru for the selective CO2hydrogenation reaction and isolation of HCOOH.

Hydroxide-Membrane-Coated Pt3 Ni Nanowires as Highly Efficient Catalysts for Selective Hydrogenation Reaction

2017 ◽  
Vol 28 (5) ◽  
pp. 1705918 ◽  
Author(s):  
Pengtang Wang ◽  
Qi Shao ◽  
Xiaoneng Cui ◽  
Xing Zhu ◽  
Xiaoqing Huang
Keyword(s):  
Selective Hydrogenation ◽  
Hydrogenation Reaction ◽  
Highly Efficient

scholarly journals Synthesis of Diesel and Jet Fuel Range Cycloalkanes with Cyclopentanone and Furfural

Catalysts ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 886 ◽  
Author(s):  
Wei Wang ◽  
Shaoying Sun ◽  
Fengan Han ◽  
Guangyi Li ◽  
Xianzhao Shao ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Aldol Condensation ◽  
Freezing Point ◽  
Hydrogenation Reaction ◽  
Jet Fuel ◽  
Solvent Free ◽  
Solid Base ◽  
Carbon Yield ◽  
Ru Catalyst ◽  
Solvent Free Conditions

Diesel and jet fuel range cycloalkanes were obtained in ~84.8% overall carbon yield with cyclopentanone and furfural, which can be produced from hemicellulose. Firstly, 2,5-bis(furan-2-ylmethyl)-cyclopentanone was prepared by the aldol condensation/hydrogenation reaction of cyclopentanone and furfural under solid base and selective hydrogenation catalyst. Over the optimized catalyst (Pd/C-CaO), 98.5% carbon yield of 2,5-bis(furan-2-ylmethyl)-cyclopentanone was acquired at 423 K. Subsequently, the 2,5-bis(furan-2-ylmethyl)-cyclopentanone was further hydrodeoxygenated over the M/H-ZSM-5(Pd, Pt and Ru) catalyst. Overall, 86.1% carbon yield of diesel and jet fuel range cycloalkanes was gained over the Pd/H-ZSM-5 catalyst under solvent-free conditions. The cycloalkane mixture obtained in this work has a high density (0.82 g mL−1) and a low freezing point (241.7 K). Therefore, it can be mixed into diesel and jet fuel to increase their volumetric heat values or payloads.

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

Catalysts ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 12
Author(s):  
Hao Yuan ◽  
Zhao Wang ◽  
Shunjing Jin ◽  
Shanshan Xiao ◽  
Siming Liu ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Porous Alumina ◽  
Hydrogenation Reaction ◽  
Copper Surface ◽  
Hierarchically Porous ◽  
In Situ Activation ◽  
Hydrogenation Reactions ◽  
Hydrolysis Of Metal Alkoxides ◽  
Catalytic Stability ◽  
Cu Catalysts

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.

Synthesis of Zingerone Using NiCl2•6H2O-NaBH4 as a Selective Hydrogenation Reaction Agent

2019 ◽  
Vol 948 ◽  
pp. 127-132
Author(s):  
Murdiah ◽  
Deni Pranowo ◽  
Tri Joko Raharjo
Keyword(s):  
Mild Condition ◽  
Selective Hydrogenation ◽  
Aldol Condensation ◽  
Condensation Reaction ◽  
Hydrogenation Reaction ◽  
Second Step ◽  
H Nmr ◽  
Ft Ir ◽  
High Yields ◽  
C Nmr

Synthesis of zingerone (4-(4-hydroxy-3-methoxyphenyl)-2-butanone) has been done. The first step was to synthesize the compound (4-(4-hydroxy-3-methoxyphenyl)-3-buten-2-on) through a cross aldol condensation reaction between vanilin:acetone mol ratio of 1:5:5, for 5 hours in high yields (97%). The second step was the selective hydrogenation of (4-(4-hydroxy-3-methoxyphenyl)-3-buten-2-on) with NiCl2•6H2O-NaBH4 catalyst in mild condition. Based on the FT-IR, 13C-NMR and 1H-NMR and GC-MS analyses, the synthesis of zingerone has been successfully synthesized by selective hydrogenation reaction with 80% yield.

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

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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