Process for closed-cycle thermochemical production of hydrogen and oxygen from water. [uses auxiliary compounds of the system iron-chlorine]

Patent · Tue Aug 02 04:00:00 EDT 1977

OSTI ID:7092847

Knoche, K F; Schubert, J; Schulze-Bentrop, R

A closed-cycle multi-step thermochemical process is described for the production of hydrogen and oxygen from water. The disclosed process utilizes auxiliary compounds of the system iron-chlorine. By using the following two basic process steps: (a) reacting an iron oxide with hydrogen chloride or a mixture of hydrogen chloride and chlorine to form iron(II) chloride or iron(III) chloride, and, (b) reacting iron or iron(II) oxide with water to form iron(II) oxide or iron(II)(III) oxide, it is possible to employ a variety of additional steps so that the sum total of the reaction steps consume water, produce hydrogen and oxygen and regenerate the desired starting materials within the closed system.

• Assignee: Rheinische Braunkohlenwerke AG
• Patent Number(s): US 4039651
• OSTI ID: 7092847
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
080102* -- Hydrogen-- Production-- Thermochemical Processes
CHALCOGENIDES
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
INORGANIC ACIDS
IRON COMPOUNDS
IRON OXIDES
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
PRODUCTION
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
WATER