摘要 |
A process for converting a carbon containing fuel and water vapor into a reformate gas that includes hydrogen, carbon monoxide and carbon dioxide, using water molecules that diffuse through a membrane by steam permeation reforming. The process includes providing a ceramic membrane comprising an oxide ceramic having intrinsic and extrinsic oxygen ion vacancies, and having first and second surfaces; where the oxide ceramic capable of reacting with gaseous water molecules at the first surface by the reversible reaction, H2O(g)+VO<..>+O<x>O<custom-character file="US20050019622A1-20050127-P00900.TIF" wi="20" he="20" id="custom-character-00001"/>2OH<.>o; and the oxide ceramic capable of producing gaseous water molecules at the second surface by the reversible reaction, 2 OH<.>o<custom-character file="US20050019622A1-20050127-P00900.TIF" wi="20" he="20" id="custom-character-00002"/>H2O(g)+VO<..>+O<x>o; contacting water vapor with the first surface; contacting the reformate gas with the second surface, whereby solid state ambipolar diffusion of oxygen ion vacancies and protons across the membrane occurs; and the ambipolar diffusion produces a net diffusion flux of water molecules through the membrane from the first surface to the second surface.
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