Creation, characterisation and performance of vanadyl active sites in microporous and mesoporous silica-based catalysts for the selective oxidation of hydrocarbons

1998 ◽  
Vol 94 (20) ◽  
pp. 3177-3182 ◽  
Author(s):  
Richard D. Oldroyd ◽  
Gopinathan Sankar ◽  
John Meurig Thomas ◽  
Matthias Hunnius ◽  
Wilhelm F. Maier
Keyword(s):  
Mesoporous Silica ◽  
Selective Oxidation ◽  
Active Sites ◽  
Oxidation Of Hydrocarbons ◽  
And Performance

Effects of Nb Promoter on the Properties of Cu/ZnO/SBA-15 Catalyst and Performance in Methanol Production

2016 ◽  
Vol 708 ◽  
pp. 94-97 ◽  
Author(s):  
Noor Asmawati Mohd Zabidi ◽  
Sara Tasfy ◽  
Maizatul Shima Shaharun
Keyword(s):  
Mesoporous Silica ◽  
Active Sites ◽  
Fixed Bed ◽  
Alternative Route ◽  
Methanol Production ◽  
Surface Areas ◽  
Attractive Option ◽  
And Performance ◽  
Hydrogenation Of Co

Hydrogenation of CO2 provides an alternative route for methanol production and attractive option for CO2 utilization. The present work investigates the synthesis of Cu-based catalyst on mesoporous silica (SBA-15) and promotion of the Cu-based catalyst with niobium (Nb). The addition of Nb promoter enhanced the reducibility and dispersion of the active sites as well as increased the BET and Cu surface areas. The performance of the synthesized catalyst in the hydrogenation of CO2 was evaluated in a fixed-bed microreactor at 523K, 22.5bar and H2/CO2 of 3. The CO2 conversion using the Cu/ZnO/SBA-15 catalyst was 14.2 % and increased to 17.1% on the Nb-promoted catalyst. The yield of methanol obtained using the un-promoted Cu-based catalyst was 51.4 g/h.gcat and it increased to 143 g/h.gcat over the Nb-promoted catalyst.

The Selective Oxidation of Hydrocarbons on Isolated Iron Active Sites under Ambient Conditions

2019 ◽  
Vol 41 (6) ◽  
pp. 946-946
Author(s):  
Zhengliang Qi Zhengliang Qi ◽  
Junmei Liu Junmei Liu ◽  
Wanwan Guo and Jun Huang Wanwan Guo and Jun Huang
Keyword(s):  
Ionic Liquid ◽  
Activated Carbon ◽  
Carbon Material ◽  
Active Sites ◽  
High Selectivity ◽  
Good Activity ◽  
Ambient Conditions ◽  
Oxidation Of Hydrocarbons ◽  
Fe Catalysts ◽  
Iron Active Sites

The N-doped carbon material supported Fe catalysts were developed for the oxidation of C-H bond of hydrocarbons to ketones and alcohols. The supported Fe catalysts were prepared by pyrolysis of [CMIM]3Fe(CN)6 ionic liquid in activated carbon. And the Fe(Ⅲ)@CN-600 showed good activity and high selectivity for the oxidation of alfa C-H bond of alkylbenzenes. The isolated Fe(Ⅲ) iron active sites should be responsible for the high activity and selectivity for the oxidation of hydrocarbons to ketones. Several ketones were obtained in good to excellent yields. Moreover, cyclohexanone can also be obtained through the oxidation of cyclohexane.

ChemInform Abstract: Nanoaggregates of Simple Mn Porphyrin Complexes as Catalysts for the Selective Oxidation of Hydrocarbons.

ChemInform ◽  
2014 ◽  
Vol 45 (3) ◽  
pp. no-no
Author(s):  
Abdolreza Rezaeifard ◽  
Vahideh Soltani ◽  
Maasoumeh Jafarpour
Keyword(s):  
Selective Oxidation ◽  
Oxidation Of Hydrocarbons

scholarly journals Mesoporous MnCeOx solid solutions for low temperature and selective oxidation of hydrocarbons

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Pengfei Zhang ◽  
Hanfeng Lu ◽  
Ying Zhou ◽  
Li Zhang ◽  
Zili Wu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Selective Oxidation ◽  
Solid Solutions ◽  
Oxidation Of Hydrocarbons
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