In this work, the process of OCM carried out over Mn-Na2WO4/SiO2 integrated with selective oxidation over Ag/support was investigated. the effect of feed gas composition and OCM bed temperature as well as the position of Ag/support bed and additional oxygen injection before this bed were investigated. At optimal OCM conditions for the Mn-Na2WO4/SiO2 catalyst (CH4/O2 = 3.75;