Multi-step thermochemical processes

Funk, J. E., Conger, W. L., Carty, R. H., Evaluation of Multi-step Thermochemical Processes for the Production of Hydrogen from Water, The Hydrogen Economy Miami Energy (THEME) Conference, Miami Beach, 457, March 18-20,1974. 

The first multi-step process having a theoretical efficiency above 50% was proposed by Marchetti and Beni in 1970 [2]. This process became the Mark-1 process of the European Commission s Joint Research Center (JRC), Ispra, Italy. A large number of cycles with reasonably high efficiencies were designed after this Abanades and co-workers have recently made a compilation of the available thermochemical cycles that yielded about 280 cycles [67]. A large number of cycles are listed in references [2,4,67,95,97]. However only a few of these processes have exhibited potential for high overall efficiencies and technical feasibility. We discuss a few cycles that are presently under study and promising for practical implementation. 

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