scholarly journals Effects of Coke Deposits on the Catalytic Performance of Large Zeolite H-ZSM-5 Crystals during Alcohol-to-Hydrocarbon Reactions as Investigated by a Combination of Optical Spectroscopy and Microscopy

2015 ◽  
Vol 21 (48) ◽  
pp. 17324-17335 ◽  
Author(s):  
Emily C. Nordvang ◽  
Elena Borodina ◽  
Javier Ruiz-Martínez ◽  
Rasmus Fehrmann ◽  
Bert M. Weckhuysen
Keyword(s):  
Optical Spectroscopy ◽  
Catalytic Performance ◽  
Hydrocarbon Reactions

The design and catalytic performance of molybdenum active sites on an MCM-41 framework for the aerobic oxidation of 5-hydroxymethylfurfural to 2,5-diformylfuran

2019 ◽  
Vol 9 (3) ◽  
pp. 811-821 ◽  
Author(s):  
Zhao-Meng Wang ◽  
Li-Juan Liu ◽  
Bo Xiang ◽  
Yue Wang ◽  
Ya-Jing Lyu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Active Sites ◽  
Aerobic Oxidation ◽  
Catalytic Performance ◽  
Mcm 41

The catalytic activity decreases as –(SiO)3Mo(OH)(O) > –(SiO)2Mo(O)2 > –(O)4–MoO.

Optimizing electron density of nickel sulfide electrocatalysts through sulfur vacancy engineering for alkaline hydrogen evolution

2020 ◽  
Vol 8 (35) ◽  
pp. 18207-18214
Author(s):  
Dongbo Jia ◽  
Lili Han ◽  
Ying Li ◽  
Wenjun He ◽  
Caichi Liu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Electron Density ◽  
Rational Design ◽  
Nickel Sulfide ◽  
Catalytic Performance ◽  
Sulfide Catalysts ◽  
Sulfur Vacancy

A novel, rational design for porous S-vacancy nickel sulfide catalysts with remarkable catalytic performance for alkaline HER.

Plasma catalysis of hydrocarbon reactions in pulse microwave discharge

1999 ◽  
Author(s):  
B. Potapkin ◽  
A. Babaritski ◽  
M. Deminskiy ◽  
V. Jivotov ◽  
R. Smirnov ◽  
...  
Keyword(s):  
Microwave Discharge ◽  
Plasma Catalysis ◽  
Pulse Microwave ◽  
Hydrocarbon Reactions

Catalytic Resonance Theory: Parallel Reaction Pathway Control

2019 ◽  
Author(s):  
M. Alexander Ardagh ◽  
Manish Shetty ◽  
Anatoliy Kuznetsov ◽  
Qi Zhang ◽  
Phillip Christopher ◽  
...  
Keyword(s):  
Chemical Reactions ◽  
Active Site ◽  
Active Sites ◽  
Reaction Pathway ◽  
Control Strategies ◽  
Oscillation Amplitude ◽  
Catalytic Performance ◽  
Parallel Reaction ◽  
Resonance Theory ◽  
Static Conditions

Catalytic enhancement of chemical reactions via heterogeneous materials occurs through stabilization of transition states at designed active sites, but dramatically greater rate acceleration on that same active site is achieved when the surface intermediates oscillate in binding energy. The applied oscillation amplitude and frequency can accelerate reactions orders of magnitude above the catalytic rates of static systems, provided the active site dynamics are tuned to the natural frequencies of the surface chemistry. In this work, differences in the characteristics of parallel reactions are exploited via selective application of active site dynamics (0 < ΔU < 1.0 eV amplitude, 10<sup>-6</sup> < f < 10<sup>4</sup> Hz frequency) to control the extent of competing reactions occurring on the shared catalytic surface. Simulation of multiple parallel reaction systems with broad range of variation in chemical parameters revealed that parallel chemistries are highly tunable in selectivity between either pure product, even when specific products are not selectively produced under static conditions. Two mechanisms leading to dynamic selectivity control were identified: (i) surface thermodynamic control of one product species under strong binding conditions, or (ii) catalytic resonance of the kinetics of one reaction over the other. These dynamic parallel pathway control strategies applied to a host of chemical conditions indicate significant potential for improving the catalytic performance of many important industrial chemical reactions beyond their existing static performance.

Using optical spectroscopy for the study of paper degradation

2006 ◽  
Vol 49 (1) ◽  
pp. 25-35 ◽  
Author(s):  
Mauro Missori ◽  
Marcofabio Righini
Keyword(s):  
Optical Spectroscopy ◽  
Paper Degradation

Fabrication and Excellent Catalytic Performance of Three-dimensional Ordered Mesoporous Molybdenum Oxides

2014 ◽  
Vol 29 (2) ◽  
pp. 124-130 ◽  
Author(s):  
Yu-Cheng DU ◽  
Guang-Wei ZHENG ◽  
Qi MENG ◽  
Li-Ping WANG ◽  
Hai-Guang FAN ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Catalytic Performance ◽  
Molybdenum Oxides ◽  
Ordered Mesoporous ◽  
Excellent Catalytic Performance

Preparation of CeO2-ZrO2-Al2O3 and Catalytic Performance of Palladium-Based Three-Way Catalyst

2010 ◽  
Vol 31 (4) ◽  
pp. 429-434
Author(s):  
Ming ZHAO ◽  
Hairong WANG ◽  
Shanhu CHEN ◽  
Yanling YAO ◽  
Maochu GONG ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Three Way Catalyst

Effect of Supports on Catalytic Performance of Nickel-Based Catalyst for Methanation

2014 ◽  
Vol 32 (8) ◽  
pp. 1400-1404
Author(s):  
Xia LI ◽  
Xiazhen YANG ◽  
Haodong TANG ◽  
Huazhang LIU
Keyword(s):  
Catalytic Performance

Preparation of Cu-Mn/Zr-Ce-SBA-15 Catalyst with Short Mesochannels and Its Catalytic Performance for Toluene Combustion

2014 ◽  
Vol 32 (6) ◽  
pp. 1069-1075
Author(s):  
Jinfang YUAN ◽  
Jiansheng LI ◽  
Fang WANG ◽  
Xiuyun SUN ◽  
Jinyou SHEN ◽  
...  
Keyword(s):  
Catalytic Performance
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