Regulating Pd/Al2O3 catalyst by g-C3N4 toward enhanced selectivity of isoprene hydrogenation

2021 ◽  
Author(s):  
Xiang Yu ◽  
Yuqi Zhang ◽  
Huan Liu ◽  
Shunqin Liang ◽  
Limin Sun ◽  
...  
Keyword(s):  
Surface Properties ◽  
Catalytic Performance ◽  
Supported Metals ◽  
Al2o3 Catalyst ◽  
Enhanced Selectivity

The catalytic performance of supported metals could be influenced by the impurities on support. In this work, we regulated the surface properties of commercial Pd/Al2O3 by a thermally and chemically...

Effect of Ba on the catalytic performance of Co-Ru/Al2O3 catalyst for Fischer-Tropsch synthesis

Fuel ◽  
2021 ◽  
Vol 292 ◽  
pp. 120398
Author(s):  
Shupeng Guo ◽  
Zhongyi Ma ◽  
Jungang Wang ◽  
Bo Hou ◽  
Litao Jia ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Al2o3 Catalyst

scholarly journals Influence of incorporating a small amount of silica on the catalytic performance of a MoO3/Al2O3 catalyst in ethanol oxidative dehydrogenation

2018 ◽  
Vol 16 (6) ◽  
Author(s):  
Aline Villarreal ◽  
Gabriella Garbarino ◽  
Paola Riani ◽  
Aida Gutiérrez Alejandre ◽  
Jorge Ramírez ◽  
...  
Keyword(s):  
Oxidative Dehydrogenation ◽  
Active Sites ◽  
Catalytic Performance ◽  
Redox Behavior ◽  
Acid Base ◽  
Pure Alumina ◽  
Molybdenum Catalyst ◽  
Al2o3 Catalyst ◽  
Dehydrogenation Of Ethanol

The influence of incorporating a small amount of silica on the catalytic performance of MoO3/Al2O3 catalyst was studied. Molybdenum supported on pure alumina and 5% SiO2-Al2O3 supports were synthesized. The catalysts were characterized by XRD, Raman, UV-Vis and IR spectroscopies, FE-SEM microscopy, and their activity was evaluated in the oxidative dehydrogenation of ethanol to acetaldehyde. Molybdenum supported on pure alumina gives a 74% yield to acetaldehyde (at 573 K) due to the generation of oxy-dehydrogenation active sites by molybdenum and to the decrement of the alumina dehydration sites. For the molybdenum catalyst supported on silica-containing alumina, the molybdenum species were displaced from the strongest alumina’s acid-base couples, located on nanoparticles edges, corners and defects, to weaker ones located on plane faces causing the rise of weakly bonded species with less active redox behavior.  

scholarly journals DRIFTS study of Fe promoter effect on Rh/Al2O3 catalyst for C2 oxygenates synthesis from syngas

2019 ◽  
Vol 9 (3-4) ◽  
pp. 211-219
Author(s):  
Fang Li ◽  
Weixing Qian
Keyword(s):  
Co Adsorption ◽  
Catalytic Performance ◽  
Desorption Rate ◽  
Hydrogenation Activity ◽  
Promoter Effect ◽  
Fe Content ◽  
Adsorbed Co ◽  
Key Steps ◽  
Performance Results ◽  
Al2o3 Catalyst

Abstract DRIFTS experiments such as CO adsorption, CO-TPSR and CO+H2 were designated to study the effect of Fe promoter on the key steps of C2 oxygenates formation from syngas. The CO adsorption results demonstrated that Fe weakened CO adsorption and especially the bridging adsorption. It was found in CO-TPSR experiments that the catalyst with lower Fe loading is more easily dissociated while the ones with higher Fe loading own stronger hydrogenation activity. Moreover, it was observed by CO+H2 experiments that Fe plays a role in stabilizing the lineally adsorbed CO species and decreasing the CO desorption rate. The catalytic performance results indicated that when Fe content is 4wt. %, the selectivity of total C2 oxygenates is the highest, which was in accordance with the DRIFTS results.

Nano-sized ZrO2 derived from metal–organic frameworks and their catalytic performance for aromatic synthesis from syngas

2019 ◽  
Vol 9 (11) ◽  
pp. 2982-2992 ◽  
Author(s):  
Jingge Liu ◽  
Yurong He ◽  
Linlin Yan ◽  
Ke Li ◽  
Chenghua Zhang ◽  
...  
Keyword(s):  
Surface Properties ◽  
Oxygen Vacancies ◽  
Metal Organic Frameworks ◽  
Catalytic Performance ◽  
Metal Organic

Oxygen vacancies apparently improve the surface properties of nano-sized ZrO2, inducing the promotion of the catalytic performance of nano-sized ZrO2.

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