Recent developments in the engineering and chemistry of the ZnSe thermochemical hydrogen cycle. [42% efficiency, cost $131 GJ]

Conference · Thu May 19 04:00:00 EDT 1977

OSTI ID:7305355

Otsuki, H H; Pearson, R K; Krikorian, O H

An improved version of the ZnSe thermochemical cycle for hydrogen production is described. We also present recent findings on the ZnCl/sub 2/ high temperature steam hydrolysis of liquid ZnCl/sub 2/ and on the kinetics of decomposition of H/sub 2/Se. A preliminary design of a process based on the improved cycle was prepared to examine its overall thermal efficiency and to derive hydrogen production costs. Conceptual designs for several critical equipment items are shown and their special features discussed. Overall thermal efficiency of the cycle depends strongly on our ability to recover reaction heats and match them with process heat requirements. Thermal efficiency of the cycle is estimated to be about 42 percent and estimated cost for hydrogen production is about $13/GJ.

• Research Organization: California Univ., Livermore (USA). Lawrence Livermore Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7305355
• Report Number(s): UCRL-79098(Rev.1); CONF-770804-5
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
080102* -- Hydrogen-- Production-- Thermochemical Processes
CHALCOGENIDES
COST
CRYOGENIC FLUIDS
EFFICIENCY
ELEMENTS
FLUIDS
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PRODUCTION
SELENIUM
SEMIMETALS
THERMOCHEMICAL PROCESSES
WATER
ZINC COMPOUNDS
ZINC OXIDES