Research progress in low-temperature catalytic direct conversion of methane to C2 value-added chemicals
Methane,which is abundant and affordable,is not only a high-quality fossil fuel,but also a new material for synthesizing high-value chemicals.Due to its inertness,the direct conversion of methane requires high activation energy and usually requires harsh reaction conditions or strong oxidizing agents.Directly converting methane into valuable energy under mild conditions is a promising technique,which can reduce the thermodynamic barrier in the direct conversion of methane,and avoid the common problems of peroxides and catalyst deactivation,but it is still a huge challenge.In this review,the research progress of anaerobic reaction systems and aerobic reaction systems in the catalyzed conversion of methane to C2 value-added chemicals is reviewed.The construction of catalysts is elaborated and discussed in detail from the aspects of active centers and reaction mechanism.Finally,we take a look at the challenges facing this area and propose potential solutions.
methane conversionlow temperatureC2 value-added chemicalsC-H bond activation