Selective Hydrogenation of Benzene to Cyclohexene on a Ru/Al2O3/Cordierite Monolithic Catalyst: Effect of Mass Transfer on the Catalytic Performance

2008 ◽  
Vol 47 (14) ◽  
pp. 4641-4647 ◽  
Author(s):  
Yujun Zhao ◽  
Jin Zhou ◽  
Jianguo Zhang ◽  
Deyi Li ◽  
Shudong Wang
Keyword(s):  
Mass Transfer ◽  
Selective Hydrogenation ◽  
Catalytic Performance ◽  
Monolithic Catalyst ◽  
Catalyst Effect

Selective hydrogenation of dimethyl maleate to tetrahydrofuran over Cu/SiO2 catalyst: Effect of Cu+ on the catalytic performance

2015 ◽  
Vol 26 (9) ◽  
pp. 1150-1154 ◽  
Author(s):  
Xue-Qing Han ◽  
Qun-Feng Zhang ◽  
Feng Feng ◽  
Chun-Shan Lu ◽  
Lei Ma ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Catalytic Performance ◽  
Dimethyl Maleate ◽  
Catalyst Effect

Effects of impregnation solvent and reduction temperature on the catalytic performance of Pd/Al2O3 in the selective hydrogenation of 1,3-butadiene

2011 ◽  
Vol 103 (2) ◽  
pp. 405-417 ◽  
Author(s):  
Kanda Pattamakomsan ◽  
Francisco Jose Cadete Santos Aires ◽  
Kongkiate Suriye ◽  
Joongjai Panpranot
Keyword(s):  
Selective Hydrogenation ◽  
Catalytic Performance ◽  
Reduction Temperature

scholarly journals The Catalytic Oxidation of Formaldehyde by FeOx-MnO2-CeO2 Catalyst: Effect of Iron Modification

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 555
Author(s):  
Yaxin Dong ◽  
Chenguang Su ◽  
Kai Liu ◽  
Haomeng Wang ◽  
Zheng Zheng ◽  
...  
Keyword(s):  
Low Temperatures ◽  
Oxygen Vacancies ◽  
Catalytic Performance ◽  
Active Oxygen ◽  
Molar Ratio ◽  
N2 Adsorption ◽  
Structure Activity ◽  
Iron Modification ◽  
Surface Active ◽  
Catalyst Effect

A series of FeOx-MnO2-CeO2 catalysts were synthesized by the surfactant-templated coprecipitation method and applied for HCHO removal. The influence of Fe/Mn/Ce molar ratio on the catalytic performance was investigated, and the FeOx-MnO2-CeO2 catalyst exhibited excellent catalytic activity, with complete HCHO conversion at low temperatures (40 °C) when the molar ratio of Fe/Mn/Ce was 2/5/5. The catalysts were characterized by N2 adsorption and desorption, XRD, H2-TPR, O2-TPD and XPS techniques to illustrate their structure–activity relationships. The result revealed that the introduction of FeOx into MnO2-CeO2 formed a strong interaction between FeOx-MnO2-CeO2, which facilitated the improved dispersion of MnO2-CeO2, subsequently increasing the surface area and aiding pore development. This promotion effect of Fe enhanced the reducibility and produced abundant surface-active oxygen. In addition, a great number of Oα is beneficial to the intermediate decomposition, whereas the existence of Ce3+ favors the formation of oxygen vacancies on the surface of the catalyst, all of which contributed to HCHO oxidation at low temperatures.

Cobalt–graphene nanomaterial as an efficient catalyst for selective hydrogenation of 5-hydroxymethylfurfural into 2,5-dimethylfuran

2019 ◽  
Vol 9 (6) ◽  
pp. 1329-1333 ◽  
Author(s):  
Fan Yang ◽  
Jingbo Mao ◽  
Shenmin Li ◽  
Jingmei Yin ◽  
Jinxia Zhou ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Selective Hydrogenation ◽  
Catalytic Performance ◽  
Efficient Catalyst ◽  
Reduced Graphene

The synergy of single Co atoms/Co clusters and CoOx nanoparticles, as well as reduced graphene oxide, leads to superior catalytic performance.

scholarly journals Designing a Mesoporous Zeolite Catalyst for Products Optimizing in n-Decane Hydrocraking

Catalysts ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 766 ◽  
Author(s):  
Li Tan ◽  
Xiaoyu Guo ◽  
Xinhua Gao ◽  
Noritatsu Tsubaki
Keyword(s):  
Mass Transfer ◽  
Active Sites ◽  
Zeolite Catalyst ◽  
Catalytic Performance ◽  
Hydrogen Spillover ◽  
Mesoporous Zeolite ◽  
Mesoporous Catalyst ◽  
Hydrogen Atoms ◽  
Effect Factors ◽  
And Diffusion

Mesoporous ZSM-5 zeolite is developed to enhance the catalytic performance in a hydrocracking reaction. The generated mesopores and mesoporous channels in the new catalyst supply more opportunities for reactant accessing the active sites according to the better mass transfer and diffusion. Meanwhile, the acidity of the mesoporous catalyst is also weakened because of the removal of Si and Al species from its MFI structure, which makes the products distribution drift to more valued chemicals such as olefins. In the modified mesoporous ZSM-5 zeolites via different metallic promoters, the olefins’ selectivity increases as the alkalinity of the catalyst increases. The reason for this is that the formed olefins will be further hydrogenated into corresponding alkanes immediately over the extremely acidic zeolite catalyst. Hence, the moderate alkalinity will limit this process, while at the same time the remaining olefins products will too. Furthermore, the Pd-based mesoporous ZSM-5 zeolite shows an excellent n-decane conversion and high propane selectivity due to the occurrence of hydrogen spillover via the Pd promoter. The phenomenon of hydrogen spillover supplies more chemisorbed sites of hydrogen atoms for hydrocracking and hydrogenating in this reaction. In short, this study explores the important effect factors in n-decane hydrocracking reaction activity and products distribution. It also shows a potential for the further industrial application of petroleum-derived fuel hydrocracking according to the optimized products distribution under metallic promoted mesoporous zeolite.

Efficient and selective hydrogenation of benzonitrile to benzylamine: improvement on catalytic performance and stability in a trickle-bed reactor

2017 ◽  
Vol 41 (10) ◽  
pp. 3758-3765 ◽  
Author(s):  
Chengyong Dai ◽  
Shuya Zhu ◽  
Xueguang Wang ◽  
Chunlei Zhang ◽  
Wenxiang Zhang ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Catalytic Performance ◽  
Trickle Bed Reactor ◽  
Trickle Bed

The hydrogenation of benzonitrile with a high benzylamine yield of 86% is accomplished over a Pd/γ-Al2O3 catalyst in a trickle-bed reactor.

scholarly journals Developing two-dimensional solid superacids with enhanced mass transport, extremely high acid strength and superior catalytic performance

2019 ◽  
Vol 10 (23) ◽  
pp. 5875-5883 ◽  
Author(s):  
Fujian Liu ◽  
Xianfeng Yi ◽  
Wei Chen ◽  
Zhiqiang Liu ◽  
Wei Chen ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Mass Transport ◽  
Biomass Conversion ◽  
Catalytic Performance ◽  
Acid Strength ◽  
Two Dimensional ◽  
Solid Superacids ◽  
High Acid ◽  
Transfer Properties

2D hybrid solid superacids with extremely high acid strength and outstanding mass transfer properties were prepared and exhibit superior activities for biomass conversion.

Rh nanoclusters encaged in hollow mesoporous silica nanoreactors with enhanced catalytic performance for phenol selective hydrogenation

2020 ◽  
Vol 397 ◽  
pp. 125484 ◽  
Author(s):  
Peijian Yan ◽  
Pengfei Tian ◽  
Kaijie Li ◽  
Martien A. Cohen Stuart ◽  
Junyou Wang ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Selective Hydrogenation ◽  
Catalytic Performance ◽  
Hollow Mesoporous Silica
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