Oxidative Coupling Of Methane Over Mixed Bacl2-Tio2-Sno2 And Na2wo4-Mn/Sio2 Catalysts

Oxidative coupling of methane (OCM) has been studied over a mixed catalyst constituted by Na2WO4-Mn/SiO2 (W) and BaCl2-TiO2-SnO2 (B). The effects of reaction temperature, gas hourly space velocity (GHSV) and CH4/O-2 ratio on catalytic performance were systematic investigated. Compared with the single component counterpart, the results indicated that ethylene yield was significantly enhanced over the mixed catalysts. When the BaCl2-TiO2-SnO2/Na2WO4-Mn/SiO2 (B/W) ratio was controlled at 1/5 (v/v), the ethylene yield reached 22.2 %, which was 7.1 %, 2.1 % higher than the single Na2WO4-Mn-SiO2, BaCl2-TiO2-SnO2 catalyst, respectively. Besides, the ethylene yield was higher than 20 % over the mixed catalyst in wide reaction condition range.