414429 Effect of Mn Loading Onto Mnfeo Nanocomposites for the CO2 Hydrogenation Reaction

Monday, November 9, 2015
Exhibit Hall 1 (Salt Palace Convention Center)
Adel Ismail, Advanced Materials and Nano-Research Centre, Najran University, Najran, Saudi Arabia

This work describes the preparation of mesoporous xMnFe oxide (x = 0, 0.05, 0.1, 0.2, 0.3 and 0.5 molar ratios) nanocomposites through a one-step sol-gel process in the presence of a triblock copolymer as a structure-directing agent. The prepared oxides were used as catalysts in the CO2 hydrogenation via Fischer-Tropsch reactions for the production of valuable hydrocarbons. Among the catalysts, the 0.05MnFe catalyst performed best under the selected reaction conditions: a reaction temperature of 340 °C, overall pressure of 20 bar, reactant mixture of 23% CO2/69% H2/8% N2 and flow rate of 20 mL min-1. This catalyst provided a much higher conversion of CO2 to hydrocarbons (63.2% C2-C5, 3.9% to C6+ and 3.6% to oxygenates) and the lowest levels of CO and methane formation among the xMnFe series. Moreover, 0.05MnFe was the only catalyst with a mesoporous structure, and it had a substantially lower reduction temperature than did the other members of the series. The enhanced catalytic activity of the 0.05MnFe catalyst, which contains only a small amount of Mn, appears to result primarily from its high specific area and relatively easy reduction.

Extended Abstract: File Not Uploaded
See more of this Session: Poster Session: Environmental Division
See more of this Group/Topical: Environmental Division