Abstract: A system and method for producing dry gas, such as methane or carbon dioxide, incorporates an electrochemical device that removes water and hydrogen from a mixed gas stream. The electrochemical device uses one electrochemical cell to strip hydrogen and water from the mixed gas stream and a second electrochemical cell, combined with a dry feed stream, to remove any residual water from the mixed stream and produce pure, dry gas.

Abstract: A system for producing oxygen and methane. This system comprises a methanation reactor for reacting carbon dioxide and hydrogen to produce methane and water, a reforming reactor for reforming the water and methane to hydrogen and carbon monoxide, a condenser for separating the methane and water, and an electrolyzer for electrolyzing the water to hydrogen and oxygen.

Abstract: A method for producing oxygen and methane from carbon dioxide, and hydrogen utilizing a methanation reactor, a reforming reactor, and an electrolyzer. Carbon dioxide and hydrogen are reacted to produce methane and water. A portion of the water along with a portion or all of the methane is directed to a reforming reactor where it is reacted to produce hydrogen and carbon monoxide, while the remaining portion of the methane is stored. The hydrogen is recycled to the methanation reactor while the carbon monoxide is vented or stored for use as a fuel. The second portion of the water is electrolyzed to its constituents, hydrogen and oxygen. The oxygen is stored or used for life support while the hydrogen is recycled to react with additional carbon dioxide.