Syngas Conversion to C2 Oxygenates over the Cu/β-Mo2C Catalyst: Probing into the Effect of the Interface between Cu and β-Mo2C on Catalytic Performance

2019 ◽  
Vol 123 (34) ◽  
pp. 21022-21030 ◽  
Author(s):  
Riguang Zhang ◽  
Cong Wei ◽  
Weisheng Guo ◽  
Zhiqin Li ◽  
Baojun Wang ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Syngas Conversion ◽  
Mo2c Catalyst

scholarly journals Direct production of olefins via syngas conversion over Co2C-based catalyst in slurry bed reactor

RSC Advances ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 4131-4139 ◽  
Author(s):  
Xinxing Wang ◽  
Tiejun Lin ◽  
Jie Li ◽  
Fei Yu ◽  
Dong Lv ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Direct Production ◽  
Syngas Conversion

Co2C-based catalyst exhibited a promising catalytic performance for direct production of olefins via syngas conversion in slurry bed reactor.

Catalytic performance of Fe modified K/MO2C catalyst for CO hydrogenation

2011 ◽  
Vol 20 (5) ◽  
pp. 520-524 ◽  
Author(s):  
Minglin Xiang ◽  
Dudu Wu ◽  
Juan Zou ◽  
Debao Li ◽  
Yuhan Sun ◽  
...  
Keyword(s):  
Co Hydrogenation ◽  
Catalytic Performance ◽  
Mo2c Catalyst

Activated Carbon Supported Iron Catalyst for the Fischer-Tropsch Synthesis

2013 ◽  
Vol 805-806 ◽  
pp. 232-235 ◽  
Author(s):  
Hong Yan Ban ◽  
Zi Wei Wang ◽  
Zhi Qiang Wang ◽  
Zhi Gang Fang
Keyword(s):  
Activated Carbon ◽  
Surface Chemistry ◽  
Iron Catalyst ◽  
Catalytic Performance ◽  
Physical Structure ◽  
Fischer Tropsch ◽  
Syngas Conversion ◽  
Ft Synthesis ◽  
Reaction Performance ◽  
Methane Selectivity

The catalyst prepared using the AC as support showed remarkably improvement of reaction performance. The improvement of the reaction performance obtained for the AC is probably ascribed to the physical structure and surface chemistry of AC. The support and corresponding catalyst are characterized by N2 adsorption. Catalytic performance of the catalyst during FT synthesis was excellent. Syngas conversion was about 74%, whereas methane selectivity was low (~2 %).

Co-Al nanosheets derived from LDHs and their catalytic performance for syngas conversion

2019 ◽  
Vol 538 ◽  
pp. 440-448 ◽  
Author(s):  
Mingsheng Luo ◽  
Shun Xu ◽  
Qingyang Gu ◽  
Zuoxing Di ◽  
Qinglong Liu ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Syngas Conversion

Activated Carbon Supported Iron Catalyst for the Fischer-Tropsch Synthesis

2011 ◽  
Vol 335-336 ◽  
pp. 161-164
Author(s):  
Hong Yan Ban ◽  
Jiao Wei ◽  
Xiao Zhi Sun ◽  
Zhi Gang Fang
Keyword(s):  
Activated Carbon ◽  
Iron Catalyst ◽  
Catalytic Performance ◽  
Physical Structure ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Syngas Conversion ◽  
Reaction Performance ◽  
Methane Selectivity

The application of activated carbon (AC) supported Fe-Cu-K catalyst for Fischer-Tropsch synthesis (FTS) is studied. The catalyst prepared using the AC as support showed remarkably improvement of reaction performance. The improvement of the reaction performance obtained for the AC is probably ascribed to the physical structure and surface chemistry of AC. The support and corresponding catalyst are characterized by N2 adsorption. Catalytic performance of the catalyst during FT synthesis was excellent. Syngas conversion was about 74%, whereas methane selectivity was low (~2 %).

scholarly journals Interfacial Fe5C2-Cu catalysts toward low-pressure syngas conversion to long-chain alcohols

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Yinwen Li ◽  
Wa Gao ◽  
Mi Peng ◽  
Junbo Zhang ◽  
Jialve Sun ◽  
...  
Keyword(s):  
Optimal Level ◽  
Catalytic Performance ◽  
Cu Nanoparticles ◽  
Syngas Conversion ◽  
Co Conversion ◽  
Cu Catalysts ◽  
Fe Catalysts ◽  
Space Time Yield ◽  
Double Hydroxide ◽  
Long Chain

AbstractLong-chain alcohols synthesis (LAS, C5+OH) from syngas provides a promising route for the conversion of coal/biomass/natural gas into high-value chemicals. Cu-Fe binary catalysts, with the merits of cost effectiveness and high CO conversion, have attracted considerable attention. Here we report a nano-construct of a Fe5C2-Cu interfacial catalyst derived from Cu4Fe1Mg4-layered double hydroxide (Cu4Fe1Mg4-LDH) precursor, i.e., Fe5C2 clusters (~2 nm) are immobilized onto the surface of Cu nanoparticles (~25 nm). The interfacial catalyst exhibits a CO conversion of 53.2%, a selectivity of 14.8 mol% and a space time yield of 0.101 g gcat−1 h−1 for long-chain alcohols, with a surprisingly benign reaction pressure of 1 MPa. This catalytic performance, to the best of our knowledge, is comparable to the optimal level of Cu-Fe catalysts operated at much higher pressure (normally above 3 MPa).

scholarly journals Study of Syngas Conversion to Light Olefins by Response Surface Methodology

2013 ◽  
Vol 2013 ◽  
pp. 1-12 ◽  
Author(s):  
Hossein Atashi ◽  
Mehdi Shiva ◽  
Farshad Farshchi Tabrizi ◽  
Ali Akbar Mirzaei
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Fixed Bed ◽  
Optimization Procedure ◽  
Product Distribution ◽  
Catalytic Performance ◽  
Light Olefins ◽  
Chain Growth ◽  
Syngas Conversion ◽  
Chain Growth Probability

The effect of adding MgO to a precipitated iron-cobalt-manganese based Fischer-Tropsch synthesis (FTS) catalyst was investigated via response surface methodology. The catalytic performance of the catalysts was examined in a fixed bed microreactor at a total pressure of 1–7 bar, temperature of 280–380°C, MgO content of 5–25% and using a syngas having a H2to CO ratio equal to 2.The dependence of the activity and product distribution on MgO content, temperature, and pressure was successfully correlated via full quadratic second-order polynomial equations. The statistical analysis and response surface demonstrations indicated that MgO significantly influences the CO conversion and chain growth probability as well as ethane, propane, propylene, butylene selectivity, and alkene/alkane ratio. A strong interaction between variables was also evidenced in some cases. The decreasing effect of pressure on alkene to alkane ratio is investigated through olefin readsorption effects and CO hydrogenation kinetics. Finally, a multiobjective optimization procedure was employed to calculate the best amount of MgO content in different reactor conditions.

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.

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.

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