(290b) Modular Ethane-to-Liquids Via Low-Temperature Chemical Looping Oxidative Dehydrogenation of Ethane
Here we present a modular Ethane-To-Liquid fuel (m-ETL) system that is enabled by low-temperature (â¤750 Â°C) redox catalysts for chemical looping-oxidative dehydrogenation (CL-ODH). In this approach, ethane is partially oxidized to ethylene and water by utilizing the lattice oxygen of a redox catalyst in a packed bed reactor. After the redox catalyst is depleted, the reactor is purged followed by the introduction of air to both regenerate the lattice oxygen and provide heat for the net reaction. By bundling multiple packed beds together in parallel, heat can be integrated between reaction steps. The ethylene-rich product stream is then compressed and oligomerized to light liquid olefins suitable for use as gasoline. Gaseous hydrocarbon byproducts, which are recycled to the reactor with a slip stream that is burned in an engine to provide power for the system. The ability to use number-up manufacturing for the CL-ODH bundles coupled with the modular scale of these bundles make them well-suited for low-cost distributed implementation. Process simulations based upon experimental redox catalysts highlight the potential productivity of a modular system. The economic potential of and challenges to successful implementation of the technology are also explored.