Research Article
Chemical Looping Combustion of Methane: A Technology Development View
Table 6
Ranking of oxygen carrier.
| | Sr. number | Criteria for section of oxygen carrier | Ranking of oxygen carrier |
| | 1 | H2O yield (moles) | CuO > CaSO4 > NiO > CoO > Na2SO4 > Fe2O3 > Mn2O3 | | 2 | CO2 yield (moles) | CuO > NiO > CaSO4 > CoO > Na2SO4 > Fe2O3 > Mn2O3 | | 3 | H2O + CO2 yield (moles) | CuO > CaSO4 > NiO > CoO > Na2SO4 > Fe2O3 > Mn2O3 | | 4 | Carbon formation (moles) | Mn2O3 < Fe2O3 < CoO < NiO < Na2SO4 < CaSO4 < CuO | | 5 | Syngas yield (moles) | CuO > CaSO4 > Na2SO4 > NiO > CoO > Mn2O3 > Fe2O3 | | 6 | Net process heat (kJ) | CuO > NiO > CaSO4 > CoO > Na2SO4 > Mn2O3 > Fe2O3 | | 7 | Oxygen carriers used (gram) | CaSO4 > Na2SO4 > Mn2O3 > Fe2O3 > NiO > CoO > CuO | | 8 | Air moles required in CLC process of methane (moles) | Na2SO4 > Mn2O3 > Fe2O3 > CoO > CaSO4 > NiO > CuO | | 9 | Net process heat/gram of oxygen carriers (kJ/g) | CaSO4 (−5.3657 kJ, 800°C) > Na2SO4 (−4.1705 kJ, 1200°C) > NiO (−2.5334 kJ, 600°C) > CuO (−2.5196 kJ, 1150°C) > CoO (−2.3714 kJ, 600°C) > Mn2O3 (−2.2929 kJ, 600°C) > Fe2O3 (−2.1805 kJ, 600°C) |
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