Effect of carbon dioxide on the reaction performance of oxidative dehydrogenation of n -butane over vanadium-magnesium-oxides (V-Mg-O) catalyst was investigated using a conventional fixed-bed reactor. The catalyst characterization was carried out by XRD, TPD, TPR and BET technology. With the CO2 partial pressure in the feed increases, the n -butane conversion decreases slightly but the selectivity and yield to C4 dehydrogenation products increase. The selectivity to C4 dehydrogenation products of up to 70.2% and yield of 34.1% were obtained by adding proper amount of CO2 in the feed at 873 K. The high catalytic performance may be due to the competition between molecular O2 and CO2 adsorption on the active sites that are responsible for deep oxidation.
All Science Journal Classification (ASJC) codes
- Environmental Chemistry
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering