<P> Research is concentrated on the following cycles: </P> <Table> <Tr> <Th> Thermochemical cycle </Th> <Th> LHV Efficiency </Th> <Th> Temperature (° C / F) </Th> </Tr> <Tr> <Td> Cerium (IV) oxide - cerium (III) oxide cycle (CeO / Ce O) </Td> <Td>?% </Td> <Td> 2,000 ° C (3,630 ° F) </Td> </Tr> <Tr> <Td> Hybrid sulfur cycle (HyS) </Td> <Td> 43% </Td> <Td> 900 ° C (1,650 ° F) </Td> </Tr> <Tr> <Td> Sulfur iodine cycle (S-I cycle) </Td> <Td> 38% </Td> <Td> 900 ° C (1,650 ° F) </Td> </Tr> <Tr> <Td> Cadmium sulfate cycle </Td> <Td> 46% </Td> <Td> 1,000 ° C (1,830 ° F) </Td> </Tr> <Tr> <Td> Barium sulfate cycle </Td> <Td> 39% </Td> <Td> 1,000 ° C (1,830 ° F) </Td> </Tr> <Tr> <Td> Manganese sulfate cycle </Td> <Td> 35% </Td> <Td> 1,100 ° C (2,010 ° F) </Td> </Tr> <Tr> <Td> Zinc zinc - oxide cycle (Zn / ZnO) </Td> <Td> 44% </Td> <Td> 1,900 ° C (3,450 ° F) </Td> </Tr> <Tr> <Td> Hybrid cadmium cycle </Td> <Td> 42% </Td> <Td> 1,600 ° C (2,910 ° F) </Td> </Tr> <Tr> <Td> Cadmium carbonate cycle </Td> <Td> 43% </Td> <Td> 1,600 ° C (2,910 ° F) </Td> </Tr> <Tr> <Td> Iron oxide cycle (Fe3O4 / FeO) </Td> <Td> 42% </Td> <Td> 2,200 ° C (3,990 ° F) </Td> </Tr> <Tr> <Td> Sodium manganese cycle </Td> <Td> 49% </Td> <Td> 1,560 ° C (2,840 ° F) </Td> </Tr> <Tr> <Td> Nickel manganese ferrite cycle </Td> <Td> 43% </Td> <Td> 1,800 ° C (3,270 ° F) </Td> </Tr> <Tr> <Td> Zinc manganese ferrite cycle </Td> <Td> 43% </Td> <Td> 1,800 ° C (3,270 ° F) </Td> </Tr> <Tr> <Td> Copper - chlorine cycle (Cu - Cl) </Td> <Td> 41% </Td> <Td> 550 ° C (1,022 ° F) </Td> </Tr> </Table> <Tr> <Th> Thermochemical cycle </Th> <Th> LHV Efficiency </Th> <Th> Temperature (° C / F) </Th> </Tr> <Tr> <Td> Cerium (IV) oxide - cerium (III) oxide cycle (CeO / Ce O) </Td> <Td>?% </Td> <Td> 2,000 ° C (3,630 ° F) </Td> </Tr>

What happens when you split an oxygen atom