Hydrogen systems processing

Fig. 1 Proton exchange membrane fuel cell air/hydrogen system process flow diagram. BP bypass, FC fuel cell, LTlow temperature. (From Masten and Bosco 2003. Copyright John Wiley Sons Ltd. Reproduced with permission)...

Pressure swing adsorption cycle sequence for a four-bed system. (Adapted from Miller, G.Q. and Stocker,., Selection of a Hydrogen Separation Process, UOP Report, January 1999, available at http //www.uop.com/ objects/SelOfHydroSepProc.pdf Cassidy, R.T., Adsorption and ion exchange with synthetic zeolites, in ACS Symposium Series, ed. W.H. Flank, American Chemical Society, Washington, Vol. 135, p. 275,1980.)... 

Hydrogen production process by direct photolysis of hydrogen-containing compounds may be based on different types of photosensitizers in parallel with inorganic semiconductors. The model systems for photoinduced hydrogen production with porphyrins and hydrogenase were developed [4],... 

An understanding of the kinetics and catalytic mechanism of polymer hydrogenation is essential in order to optimize the reaction conditions, to control the reaction systems, and to design commercial production processes. Catalytic kinetic mechanisms for Rh-, Os- and Ru-complex polymer hydrogenation systems have been extensively investigated, and are summarized in the following sections. 

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