In situ IR studies on the mechanism of methanol synthesis over an ultrafine Cu/ZnO/Al2O3 catalyst

1998 ◽  
Vol 171 (2) ◽  
pp. 301-308 ◽  
Author(s):  
Qi Sun ◽  
Chong-Wei Liu ◽  
Wei Pan ◽  
Qi-Ming Zhu ◽  
Jing-Fa Deng
Keyword(s):  
Methanol Synthesis ◽  
Ir Studies ◽  
In Situ Ir ◽  
Al2o3 Catalyst

scholarly journals In Situ IR Studies on the Mechanism of Dimethyl Carbonate Synthesis from Methanol and Carbon Dioxide

Catalysts ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 517
Author(s):  
Khalid A. Almusaiteer ◽  
Sulaiman I. Al-Mayman ◽  
Aghaddin Mamedov ◽  
Yousef S. Al-Zeghayer
Keyword(s):  
Carbon Dioxide ◽  
Dimethyl Carbonate ◽  
Acid Base ◽  
Ir Studies ◽  
In Situ Ir ◽  
Base Mechanism ◽  
Carbon Dioxide Co2 ◽  
Diffuse Reflectance Infrared ◽  
Al2o3 Catalyst

The synthesis of dimethyl carbonate (DMC) from methanol and Carbon dioxide (CO2) has been investigated over 5% Rh/Al2O3 catalyst. Diffuse Reflectance Infrared Fourier Transfer Spectroscopy (DRIFTS) was used to probe the reaction adsorbates which showed that activation of methanol and CO2 involves generation of intermediate methoxy species and formate ingredients, participating in elementary steps of DMC formation. Formation of DMC involves parallel routes comprising interaction of the OH group of Al2O3 through an acid/base mechanism and formate pathway with participation of metal sites. DMC in acid/base pathway is formed via methoxy species to form methoxy carbonate (CH3O)CO2 (active adsorbate), which then reacts with the methyl species to form DMC. The pathway involving metal Rh sites generates an additional elementary step for the involvement of CO2 in the reaction through active formate species. The synergy of parallel pathways determines the performance of the 5% Rh/Al2O3 catalyst. Further improvement of catalyst performance should be based on such a feature of the reaction mechanism.

“IN-SITU” IR SPECTROSCOPIC STUDIES ON METHANOL SYNTHESIS OVER Cu—ZnO—Al2O3 CATALYST

1985 ◽  
Vol 1 (05) ◽  
pp. 431-441
Author(s):  
Tong Yudong ◽  
◽  
Zhu Qiming ◽  
Pan Weixiong ◽  
Liu Dianqiu ◽  
...  
Keyword(s):  
Methanol Synthesis ◽  
Spectroscopic Studies ◽  
In Situ Ir ◽  
Ir Spectroscopic

scholarly journals In situ IR studies of selective catalytic reduction of NO with NH3 on Ce-Ti amorphous oxides

2014 ◽  
Vol 35 (8) ◽  
pp. 1289-1298 ◽  
Author(s):  
Qian Li ◽  
Huachun Gu ◽  
Ping Li ◽  
Yuhao Zhou ◽  
Ying Liu ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Amorphous Oxides ◽  
Reduction Of No ◽  
Ir Studies ◽  
In Situ Ir

In situ IR studies of Co and Ce doped Mn/TiO2 catalyst for low-temperature selective catalytic reduction of NO with NH3

2015 ◽  
Vol 357 ◽  
pp. 189-196 ◽  
Author(s):  
Lu Qiu ◽  
Dandan Pang ◽  
Changliang Zhang ◽  
Jiaojiao Meng ◽  
Rongshu Zhu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Reduction Of No ◽  
Tio2 Catalyst ◽  
Ir Studies ◽  
In Situ Ir

Surface acidity of MCM-41 by in situ IR studies of pyridine adsorption

1999 ◽  
Vol 49 (1-3) ◽  
pp. 253-260 ◽  
Author(s):  
Basab Chakraborty ◽  
B. Viswanathan
Keyword(s):  
Surface Acidity ◽  
Pyridine Adsorption ◽  
Ir Studies ◽  
In Situ Ir ◽  
Mcm 41
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