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Title: Thermochemical cycles for the production of hydrogen

Abstract

Two-step processes for the preparation of hydrogen are described: CrCl/sub 3/(g) ..-->.. CrCl/sub 2/(g) + 1/2Cl/sub 2/(g) and CrCl/sub 2/(s) + HCl(g) reversible CrCl/sub 3/(s) + 1/2H/sub 2/(g); UCl/sub 4/(g) ..-->.. UCl/sub 3/(g) + 1/2Cl/sub 2/(g) and UCl/sub 3/(s) + HCl(g) ..-->.. UCl/sub 4/(s) + 1/2H/sub 2/(g); and CaSO/sub 4/(s) ..-->.. CaO(s) + SO/sub 2/(g) + 1/2O/sub 2/(g) and CaO(s) + SO/sub 2/(g) + H/sub 2/O(l) ..-->.. CaSO/sub 4/(s) + H/sub 2/(g). The high temperature available from solar collectors, high temperature gas reactors or fusion reactors is utilized in the first step in which the reaction is endothermic. The efficiency is at least 60% and with process heat recovery, the efficiency may be increased up to 74.4%. An apparatus fr carrying out the process in conjunction with a fusion reactor, is described.

Inventors:
;
OSTI Identifier:
5429807
Assignee:
TIC; ERA-05-023768; EDB-80-064999
DOE Contract Number:  
EY-76-C-02-0016
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; HYDROGEN PRODUCTION; THERMOCHEMICAL PROCESSES; CALCIUM SULFATES; CHROMIUM CHLORIDES; EFFICIENCY; EQUIPMENT; HTGR TYPE REACTORS; OXYGEN; PROCESS HEAT REACTORS; PRODUCTION; SOLAR COLLECTORS; THERMONUCLEAR REACTORS; URANIUM CHLORIDES; WATER; ACTINIDE COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CHLORIDES; CHLORINE COMPOUNDS; CHROMIUM COMPOUNDS; CRYOGENIC FLUIDS; ELEMENTS; FLUIDS; GAS COOLED REACTORS; GRAPHITE MODERATED REACTORS; HALIDES; HALOGEN COMPOUNDS; HYDROGEN COMPOUNDS; NONMETALS; OXYGEN COMPOUNDS; REACTORS; SOLAR EQUIPMENT; SULFATES; SULFUR COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; URANIUM COMPOUNDS; 080102* - Hydrogen- Production- Thermochemical Processes; 060300 - Fusion Fuels- By-Products- (-1987)

Citation Formats

Steinberg, M., and Dang, V.D. Thermochemical cycles for the production of hydrogen. United States: N. p., Web.
Steinberg, M., & Dang, V.D. Thermochemical cycles for the production of hydrogen. United States.
Steinberg, M., and Dang, V.D. . "Thermochemical cycles for the production of hydrogen". United States.
@article{osti_5429807,
title = {Thermochemical cycles for the production of hydrogen},
author = {Steinberg, M. and Dang, V.D.},
abstractNote = {Two-step processes for the preparation of hydrogen are described: CrCl/sub 3/(g) ..-->.. CrCl/sub 2/(g) + 1/2Cl/sub 2/(g) and CrCl/sub 2/(s) + HCl(g) reversible CrCl/sub 3/(s) + 1/2H/sub 2/(g); UCl/sub 4/(g) ..-->.. UCl/sub 3/(g) + 1/2Cl/sub 2/(g) and UCl/sub 3/(s) + HCl(g) ..-->.. UCl/sub 4/(s) + 1/2H/sub 2/(g); and CaSO/sub 4/(s) ..-->.. CaO(s) + SO/sub 2/(g) + 1/2O/sub 2/(g) and CaO(s) + SO/sub 2/(g) + H/sub 2/O(l) ..-->.. CaSO/sub 4/(s) + H/sub 2/(g). The high temperature available from solar collectors, high temperature gas reactors or fusion reactors is utilized in the first step in which the reaction is endothermic. The efficiency is at least 60% and with process heat recovery, the efficiency may be increased up to 74.4%. An apparatus fr carrying out the process in conjunction with a fusion reactor, is described.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {},
month = {}
}