Thermochemical processes for hydrogen production by water decomposition. Progress report, April 1--December 31, 1975

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The interest in hydrogen as a chemical feedstock and as a possible non-polluting fuel has continued to be high, affected by recent estimates of 1980 prices for imported natural gas in the range of $3.00/MM Btu. Our exhaustive survey of multi-step thermochemical and hybrid cycles concluded that the most promising prospects to date are (1) a modification of Abraham's ANL-4 cycle, and (2) the Rohm and Haas multi-reaction, single reactor cycle. Both sequences utilize iodine-based oxidation-reduction chemistry and each ultimately produces hydrogen via an iodide vapor decomposition, in the first case from NH/sub 4/I, in the second from HI. Process ... continued below

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Pages: 78

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Perlmutter, D.D. & Myers, A.L. December 1, 1975.

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Description

The interest in hydrogen as a chemical feedstock and as a possible non-polluting fuel has continued to be high, affected by recent estimates of 1980 prices for imported natural gas in the range of $3.00/MM Btu. Our exhaustive survey of multi-step thermochemical and hybrid cycles concluded that the most promising prospects to date are (1) a modification of Abraham's ANL-4 cycle, and (2) the Rohm and Haas multi-reaction, single reactor cycle. Both sequences utilize iodine-based oxidation-reduction chemistry and each ultimately produces hydrogen via an iodide vapor decomposition, in the first case from NH/sub 4/I, in the second from HI. Process feasibility depends on demonstration of separation steps of relatively low energy requirements. Further research is proposed along four lines: (1) modeling and computation focusing on selectivity in gas-solid reactions, (2) experimental studies of solids flow and mixing, as well as mass transfer and chemical reaction in rotating and/or oscillating kiln reactors, (3) kinetics of the crucial reactions in the ANL-4 and Rohm and Haas cycles, and gas separations associated with these processes, and (4) flow sheet evaluations and preliminary economics.

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Pages: 78

Notes

Dep. NTIS, PC A05/MF A01.

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  • Other Information: Portions of document are illegible

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  • Report No.: COO-2747-1
  • Grant Number: EY-76-S-02-2747
  • DOI: 10.2172/6498524 | External Link
  • Office of Scientific & Technical Information Report Number: 6498524
  • Archival Resource Key: ark:/67531/metadc1203907

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  • December 1, 1975

Added to The UNT Digital Library

  • July 5, 2018, 11:11 p.m.

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  • Oct. 15, 2018, 12:49 p.m.

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Perlmutter, D.D. & Myers, A.L. Thermochemical processes for hydrogen production by water decomposition. Progress report, April 1--December 31, 1975, report, December 1, 1975; United States. (digital.library.unt.edu/ark:/67531/metadc1203907/: accessed January 20, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.