CO2Utilization as Soft Oxidant for Basic Olefinic Chemicals
Activation of CO2 for the utilization is very difficult which can be considered as a Holy Grail in catalysis because it’s centrosymmetrical structured quadrupole molecule which is quite stable both thermodynamically and kinetically. However, CO2 becomes more abundant due to huge emission both from stationary and mobile vehicles, and cheaper due to the development of capturing technology, and non-toxic. Hence, the utilization of CO2 in massive conversion with low cost and into value-added chemicals are highly challenged with social imperativeness.
Even though, many chemicals and fuels from CO2 could be prepared for fuels and chemicals, mostly we have to do by using hydrogen as a reductant though the reductive high energy exchange processes. These productions of chemicals and fuels mostly suffer from the high cost of hydrogen, which could be provided mainly by the high temperature reforming processes of lower hydrocarbons.
Here, CO2 uses as oxygen sources were demonstrated in the reactions which require the removal of hydrogen from saturated hydrocarbons to transform into corresponding value added chemicals such as to corresponding olefins and aromatics. The role of CO2 for dehydrogenating agent was coined as a soft oxidant in the oxidative dehydrogenation, which was ascribed to enhancement in both activity and selectivity in the conversions of low alkane hydrocarbons such ethane, propane, butane, and alkyl aromatics like ethylbenzene into the corresponding hydrogen deficient olefinic chemicals.