Dependence of copper particles size and interface on the methanol and CO formation in CO2 hydrogenation over Cu@ZnO catalysts

2021 ◽  
Author(s):  
Feng Jiang ◽  
Yu Yang ◽  
Li Wang ◽  
Yufeng Li ◽  
Zhihao Fang ◽  
...  
Keyword(s):  
Methanol Synthesis ◽  
Active Sites ◽  
Co2 Hydrogenation ◽  
Copper Particles

Although Cu-based catalysts have been intensively investigated on methanol synthesis from CO2 hydrogenation, there still exists debate on the active sites for methanol and CO formation. In this work, the...

scholarly journals Synergistic Effect of Alkali Na and K Promoter on Fe-Co-Cu-Al Catalysts for CO2 Hydrogenation to Light Hydrocarbons

Catalysts ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 735
Author(s):  
Yuhao Zheng ◽  
Chenghua Xu ◽  
Xia Zhang ◽  
Qiong Wu ◽  
Jie Liu
Keyword(s):  
Synergistic Effect ◽  
Active Sites ◽  
Intermediate Formation ◽  
Active Phase ◽  
Dissociative Adsorption ◽  
Co2 Hydrogenation ◽  
Chain Growth ◽  
Co2 Conversion ◽  
Light Hydrocarbons ◽  
Active Centers

Alkali metal K- and/or Na-promoted FeCoCuAl catalysts were synthesized by precipitation and impregnation, and their physicochemical and catalytic performance for CO2 hydrogenation to light hydrocarbons was also investigated in the present work. The results indicate that Na and/or K introduction leads to the formation of active phase metallic Fe and Fe-Co crystals in the order Na < K < K-Na. The simultaneous introduction of Na and K causes a synergistic effect on increasing the basicity and electron-rich property, promoting the formation of active sites Fe@Cu and Fe-Co@Cu with Cu0 as a crystal core. These effects are advantageous to H2 dissociative adsorption and CO2 activation, giving a high CO2 conversion with hydrogenation. Moreover, electron-rich Fe@Cu (110) and Fe-Co@Cu (200) provide active centers for further H2 dissociative adsorption and O-C-Fe intermediate formation after adsorption of CO produced by RWGS. It is beneficial for carbon chain growth in C2+ hydrocarbons, including olefins and alkanes. FeCoCuAl simultaneously modified by K-Na exhibits the highest CO2 conversion and C2+ selectivity of 52.87 mol% and 89.70 mol%, respectively.

Plasma-Catalytic Methanol Synthesis from CO2 Hydrogenation over a Supported Cu Cluster Catalyst: Insights into the Reaction Mechanism

ACS Catalysis ◽  
2022 ◽  
pp. 1326-1337
Author(s):  
Zhaolun Cui ◽  
Shengyan Meng ◽  
Yanhui Yi ◽  
Amin Jafarzadeh ◽  
Shangkun Li ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Methanol Synthesis ◽  
Co2 Hydrogenation

Phase stability analysis on green methanol synthesis process from CO2 hydrogenation in water cooled, gas cooled and double cooled tubular reactors

2018 ◽  
Vol 181 ◽  
pp. 375-387 ◽  
Author(s):  
Fereshteh Samimi ◽  
Mehrzad Feilizadeh ◽  
Mohammad Ranjbaran ◽  
Mohammad Arjmand ◽  
Mohammad Reza Rahimpour
Keyword(s):  
Stability Analysis ◽  
Phase Stability ◽  
Methanol Synthesis ◽  
Co2 Hydrogenation ◽  
Synthesis Process ◽  
Tubular Reactors
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