Thermochemical cycles for the production of hydrogen

Patent ·

OSTI ID:5429807

Steinberg, M; Dang, V D

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.

• DOE Contract Number: EY-76-C-02-0016
• Assignee: TIC; ERA-05-023768; EDB-80-064999
• OSTI ID: 5429807
• Country of Publication: United States
• Language: English

Related Subjects

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)