SEPARATION OF HYDSROGEN AND CARBON DIOXIDE USING ANOVEL MEMBRANE REACTOR IN ADVANCED FOSSIL ENERGYCONVERSION PROCESSES

University Coal Research Program/Historically Black Colleges and Universities?and Other Minority Institutions

PI: Shamsuddin Ilias ; Grant Number: DE-FG26-99FT40620

PID  :  74298

来源: CEUR

【 摘 要 】

Inorganic membrane reactors offer the possibility of combining reaction and separation in asingle operation at high temperatures to overcome the equilibrium limitations experienced inconventional reactor configurations. Such attractive features can be advantageously utilized in anumber of potential commercial opportunities, which include dehydrogenation, hydrogenation,oxidative dehydrogenation, oxidation and catalytic decomposition reactions. However, to be costeffective, significant technological advances and improvements will be required to solve severalkey issues which include: (a) permselective thin solid film, (b) thermal, chemical and mechanicalstability of the film at high temperatures, and (c) reactor engineering and module development inrelation to the development of effective seals at high temperature and high pressure.In this project, we are working on the development and application of palladium and palladium silver alloy thinfilm composite membranes in membrane reactorseparator configuration forsimultaneous production and separation of hydrogen and carbon dioxide at high temperature.From our research on Pdcomposite membrane, we have demonstrated that the new membranehas significantly higher hydrogen flux with very high permselectivity than any of themembranes commercially available. The steam reforming of methane by equilibrium shift in Pd composite membrane reactor is being studied to demonstrate the potential application this newdevelopment. To have a better understanding of the membrane reactor, we developed a twodimensionalpseudohomogeneous reactor model for steam reforming of methane by equilibrium shift in atubular membrane reactor. Radial diffusion was taken into account for concentration gradient in