Na‐W‐Mn/SiO 2 Catalyst With MnO x Regulated NaWO x Sites for Low‐Temperature Oxidative Coupling of Methane

ABSTRACT The oxidative coupling of methane (OCM) reaction can directly convert CH 4 into C 2 (ethylene, ethane), which is vital for converting the world's abundant natural gas into valuable chemicals. Na‐W‐Mn/SiO 2 catalyst with high thermal stability and catalytic activity has been widely studied. However, the high temperature required for OCM reaction over Na‐W‐Mn/SiO 2 catalyst has restricted its application. The development of low‐temperature OCM catalysts is currently one of the hot topics in research. This study regulated the MnO x ‐Na 2 WO 4 interaction by adjusting the Mn loading, inducing changes in oxygen species and achieving low‐temperature oxidative coupling on traditional Na‐W‐Mn/SiO 2 catalyst. At 750°C, the Na‐W‐5Mn/SiO 2 catalyst achieved a CH 4 conversion of 44.4%, C 2 selectivity of 45.9%, and a C 2 yield of 20.4%.