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- W290023583 abstract "The ZnSe thermochemical cycle has been modified recently to convert ZnCl/sub 2/ directly to ZnO and reduce the amount of ZnSO/sub 4/ that needs to be decomposed at high temperatures. The modified cycle shows significant advantages in efficiency and process design. Exploratory research on the reaction, ZnCl/sub 2/(l) + H/sub 2/O(g) ..-->.. ZnO(s) + 2 HCl(g), showed the reaction rate to be quite rapid; i.e., 53 percent of equilibrium being attained in 2s at 800/sup 0/K. Detailed research has also been conducted on the kinetics and mechanism of decomposition of H/sub 2/Se. A process design and economic analysis of the modified cycle indicates the following: overall thermal efficiency is approximately 42 percent, and hydrogen production cost is approximately $13.22/10/sup 6/ kj in 1976 dollars for a plant producing 27,000 kg H/sub 2//h. In the CH/sub 4/--CH/sub 3/OH cycle, attempts thus far to convert CH/sub 3/OH to CH/sub 4/ by reaction with metal oxides and SO/sub 2/ have led to unacceptably high amounts of H/sub 2/O, CO/sub 2/ and organic compounds as by-products. In future studies on this cycle, the lower oxides of As, Sb, and V will be explored as reducing agents for CH/sub 3/OH." @default.
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- W290023583 date "1977-04-13" @default.
- W290023583 modified "2023-09-27" @default.
- W290023583 title "Chemical and process design studies of thermochemical cycles for hydrogen production. [42% efficiency; cost $13/10/sup 6/ kj]" @default.
- W290023583 hasPublicationYear "1977" @default.
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