Chemical looping as reactor concept for the oxidative coupling of methane over a Na2WO4/Mn/SiO2 catalyst

In this work we present chemical looping and simulated chemical looping as a new reactor concept for the oxidative coupling of methane over Na2WO4/Mn/SiO2. As a consequences of an alternating feed of oxygen and methane to the catalyst bed side reactions are avoided and the selectivity of the coupling reaction is greatly increased. By variation of methane pulse contact time and temperature a maximum yield of 0.25 is obtained. Although this does not exceed the often discussed yield limitation of OCM, it is achieved from a substantially lower amount of converted methane. A time on stream experiment were carried out at 775 and 800 degrees C for 150 min and showed stable performance and C2 yield. (C) 2016 Elsevier B.V. All rights reserved.