Catalytic Conversion of Light Hydrocarbons in an Oxygen-Permeable Membrane Reactor

摘要

Dense mixed-conducting oxygen-permeable membrane is selectively permeable to oxygen at high temperature, but not to nitrogen or any other gases. Thus, only oxygen from air can be transported through the membrane to the inside of the reactor, where it reacts with light hydrocarbons, at the same time electrons can transport back to the oxygen-reduction side. Oxygen transports through the membrane in the form of oxygen ion, so there are many oxygen species (O~-, O~(2-), O_2~(2-), O~(2-), O_2) on the membrane surface. Different reactions need the different oxygen species, so the membrane offers a potential solution to several problems in the catalytic conversion of light hydrocarbons. In this presentation, we will discuss the catalytic conversion of methane and ethane in the oxygen-permeable membrane reactor made of Ba_(0.5)Sr_(0.5)Co_(0.8)Fe_(0.2)O_(3-d) (BSCF).