Catalytic nonthermal plasma assisted co-processing of methane and nitrous oxide for methanol production

Advances in Selective Oxidation of Methane

“…That means at high temperatures, the methanol is more reactive than methane, which might lead to the decomposition of methanol to low grade product [52,[54][55][56]. In addition, the gas phase homogeneous is a free radical reaction, which means that it is difficult to control the process on the large scale [51,54,57].…”

“…The non-thermal plasma can be developed by integrating the reactor with catalyst to improve the activity and selectivity of methane oxidation. In a recent study, the Cu-doped Ni was loaded on CeO 2 , which led to enhance the selectivity of methanol until 36% [65]. In another study, multicomponent catalysts were combined with plasma in two different approaches, in-plasma catalysis (IPC) and post-plasma catalysis (PPC), for achieving high levels in both methane conversion and aimed methanol selectivity through the synergetic effect of the…”

Methane to Methanol through Heterogeneous Catalysis and Plasma Catalysis

“…Co-processing of CH 4 and nitrous oxide into high-value products, like CH 3 OH, CH 2 O, etc., was attempted in plasma under ambient conditions [121][122][123]136]. In a DBD reactor, it was observed that the mole ratio of CH 4 /N 2 O significantly affected the conversion and the product selectivity, and the highest selectivity (28%) of CH 3 OH could be realized at 5:1 CH 4 /N 2 O mole ratio, decreasing to 23% and 13%, respectively, for 1: 1 and 1: 5 ratios.…”

“…In order to improve the selectivity to CH 3 OH, CuO(10%)/CeO 2 , NiO(10%)/CeO 2 and Cu-Ni(5-5%)/CeO 2 catalysts were packed in a DBD reactor [122]. The catalytic activity followed the order of CuO-NiO/CeO 2 > NiO/CeO 2 > CuO/CeO 2 , with the best CH 3 OH selectivity of ∼36% on NiO/CeO 2 catalyst.…”

“…The catalytic activity followed the order of CuO-NiO/CeO 2 > NiO/CeO 2 > CuO/CeO 2 , with the best CH 3 OH selectivity of ∼36% on NiO/CeO 2 catalyst. The best performance is highly attributed to the oxygen vacancies (proven by Raman results), and the increasing amount of oxygen vacancies may facilitate oxygen transfer and improve the catalytic activity [122]. Generally, the generation of energetic electrons is considered as initial step in plasma-initiated reactions [110,136].…”