Home – Home – Jornals – Chemistry for Sustainable Development 2010 number 6

We consider the absorption and catalytic conversion of a single-stage method of obtaining high yield of pure hydrogen. This process involves simultaneous catalytic conversion of hydrocarbons into hydrogen and sorption removal of by-product - carbon dioxide. Different aspects of absorption and catalytic conversion are analyzed, including its technical implementation in flow reactors with fluidized and fixed bed, as well as high-temperature CO₂ absorbents and catalysts necessary for the process. It is shown that the preferred scheme for production of hydrogen from methane is that with two or more fixed bed reactors, loaded with a mixture of a conventional nickel containing catalysts of steam conversion and a high temperature reversible absorbent. The analysis of the perspective high-regenerated absorbent of CO₂: individual and deposited oxides of alkaline-earth metals, mixed lithium salts, promoted hydrotalcite. It is shown that the absorbents based on CaO have sufficient stationary dynamic capacity, stable under conditions of absorption and catalytic conversion, and optimal thermodynamic properties.