Immobilized chloroplast-ferredoxin-hydrogenase system for the simultaneous photoproduction of hydrogen and oxygen
Conference
·
OSTI ID:5875071
The chloroplast-ferredoxin-hydrogenase (CFH) system is capable of the simultaneous photoproduction of hydrogen and oxygen using water as the source of electrons. The immobilization of chloroplasts and hydrogenase, which has been the subject of several reports, has been attempted in order to increase their storage and functional stability. However, immobilized chloroplasts and hydrogenase have never been shown to produce hydrogen and oxygen simultaneously. The simultaneous photoproduction of hydrogen and oxygen is a valuable guide in assessing the role of water as the primary substrate in biophotolysis. As has been shown previously, the stoichiometric ratio of hydrogen to oxygen is, in general, not equal to two. By measuring the oxygen that is produced along with the hydrogen, it is possible to set an upper limit on the photoproduced hydrogen that is derived from water. The study reported here describes for the first time the simultaneous photoproduction of hydrogen and oxygen by the CFH system immobilized in calcium alginate gel spheres.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5875071
- Report Number(s):
- CONF-830567-3; ON: DE83015703
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
08 HYDROGEN
080106* -- Hydrogen-- Production-- Biosynthesis & Photochemical Processes
14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500 -- Photochemistry
BIOCONVERSION
BIOPHOTOLYSIS
CELL CONSTITUENTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHLOROPLASTS
DECOMPOSITION
ELEMENTS
ENZYMES
FERREDOXIN
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
HYDROGENASES
IMMOBILIZED CELLS
IMMOBILIZED ENZYMES
KINETICS
METALLOPROTEINS
NONMETALS
ORGANIC COMPOUNDS
OXIDOREDUCTASES
OXYGEN
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PROTEINS
REACTION KINETICS
STOICHIOMETRY
WATER
080106* -- Hydrogen-- Production-- Biosynthesis & Photochemical Processes
14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500 -- Photochemistry
BIOCONVERSION
BIOPHOTOLYSIS
CELL CONSTITUENTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHLOROPLASTS
DECOMPOSITION
ELEMENTS
ENZYMES
FERREDOXIN
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
HYDROGENASES
IMMOBILIZED CELLS
IMMOBILIZED ENZYMES
KINETICS
METALLOPROTEINS
NONMETALS
ORGANIC COMPOUNDS
OXIDOREDUCTASES
OXYGEN
OXYGEN COMPOUNDS
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PROTEINS
REACTION KINETICS
STOICHIOMETRY
WATER