Examination of Perovskite Structure CaMnO3-δ with MgO Addition as Oxygen Carrier for Chemical Looping with Oxygen Uncoupling Using Methane and Syngas
Perovskite structure oxygen carriers with the general formula CaMnxMg1-xO3-δ were spray-dried and examined in a batch fluidized bed reactor. The CLOU behavior, reactivity towards methane, and syngas were investigated at temperature 900°C to 1050°C. All particles showed CLOU behavior at these tempera...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | International Journal of Chemical Engineering |
| Online Access: | http://dx.doi.org/10.1155/2013/679560 |
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| author | Dazheng Jing Tobias Mattisson Henrik Leion Magnus Rydén Anders Lyngfelt |
| author_facet | Dazheng Jing Tobias Mattisson Henrik Leion Magnus Rydén Anders Lyngfelt |
| author_sort | Dazheng Jing |
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| description | Perovskite structure oxygen carriers with the general formula CaMnxMg1-xO3-δ were spray-dried and examined in a batch fluidized bed reactor. The CLOU behavior, reactivity towards methane, and syngas were investigated at temperature 900°C to 1050°C. All particles showed CLOU behavior at these temperatures. For experiments with methane, a bed mass corresponding to 57 kg/MW was used in the reactor, and the average CH4 to CO2 conversion was above 97% for most materials. Full syngas conversion was achieved for all materials utilizing a bed mass corresponding to 178 kg/MW. SEM/EDX and XRD confirmed the presence of MgO in the fresh and used samples, indicating that the Mg cation is not incorporated into the perovskite structure and the active compound is likely pure CaMnO3-δ. The very high reactivity with fuel gases, comparable to that of baseline oxygen carriers of NiO, makes these perovskite particles highly interesting for commercial CLC application. Contrary to NiO, oxygen carriers based on CaMnO3-δ have no thermodynamic limitations for methane oxidation to CO2 and H2O, not to mention that the materials are environmentally friendly and can utilize much cheaper raw materials for production. The physical properties, crystalline phases, and morphology information were also determined in this work. |
| format | Article |
| id | doaj-art-e51dac9179ba4162942d3e8e3f10b1ee |
| institution | Kabale University |
| issn | 1687-806X 1687-8078 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Chemical Engineering |
| spelling | doaj-art-e51dac9179ba4162942d3e8e3f10b1ee2025-02-03T00:59:39ZengWileyInternational Journal of Chemical Engineering1687-806X1687-80782013-01-01201310.1155/2013/679560679560Examination of Perovskite Structure CaMnO3-δ with MgO Addition as Oxygen Carrier for Chemical Looping with Oxygen Uncoupling Using Methane and SyngasDazheng Jing0Tobias Mattisson1Henrik Leion2Magnus Rydén3Anders Lyngfelt4Department of Chemical and Biological Engineering, Division of Environmental and Inorganic Chemistry, Chalmers University of Technology, 41296 Gothenburg, SwedenDepartment of Energy and Environment, Division of Energy Technology, Chalmers University of Technology, 41296 Gothenburg, SwedenDepartment of Chemical and Biological Engineering, Division of Environmental and Inorganic Chemistry, Chalmers University of Technology, 41296 Gothenburg, SwedenDepartment of Energy and Environment, Division of Energy Technology, Chalmers University of Technology, 41296 Gothenburg, SwedenDepartment of Energy and Environment, Division of Energy Technology, Chalmers University of Technology, 41296 Gothenburg, SwedenPerovskite structure oxygen carriers with the general formula CaMnxMg1-xO3-δ were spray-dried and examined in a batch fluidized bed reactor. The CLOU behavior, reactivity towards methane, and syngas were investigated at temperature 900°C to 1050°C. All particles showed CLOU behavior at these temperatures. For experiments with methane, a bed mass corresponding to 57 kg/MW was used in the reactor, and the average CH4 to CO2 conversion was above 97% for most materials. Full syngas conversion was achieved for all materials utilizing a bed mass corresponding to 178 kg/MW. SEM/EDX and XRD confirmed the presence of MgO in the fresh and used samples, indicating that the Mg cation is not incorporated into the perovskite structure and the active compound is likely pure CaMnO3-δ. The very high reactivity with fuel gases, comparable to that of baseline oxygen carriers of NiO, makes these perovskite particles highly interesting for commercial CLC application. Contrary to NiO, oxygen carriers based on CaMnO3-δ have no thermodynamic limitations for methane oxidation to CO2 and H2O, not to mention that the materials are environmentally friendly and can utilize much cheaper raw materials for production. The physical properties, crystalline phases, and morphology information were also determined in this work.http://dx.doi.org/10.1155/2013/679560 |
| spellingShingle | Dazheng Jing Tobias Mattisson Henrik Leion Magnus Rydén Anders Lyngfelt Examination of Perovskite Structure CaMnO3-δ with MgO Addition as Oxygen Carrier for Chemical Looping with Oxygen Uncoupling Using Methane and Syngas International Journal of Chemical Engineering |
| title | Examination of Perovskite Structure CaMnO3-δ with MgO Addition as Oxygen Carrier for Chemical Looping with Oxygen Uncoupling Using Methane and Syngas |
| title_full | Examination of Perovskite Structure CaMnO3-δ with MgO Addition as Oxygen Carrier for Chemical Looping with Oxygen Uncoupling Using Methane and Syngas |
| title_fullStr | Examination of Perovskite Structure CaMnO3-δ with MgO Addition as Oxygen Carrier for Chemical Looping with Oxygen Uncoupling Using Methane and Syngas |
| title_full_unstemmed | Examination of Perovskite Structure CaMnO3-δ with MgO Addition as Oxygen Carrier for Chemical Looping with Oxygen Uncoupling Using Methane and Syngas |
| title_short | Examination of Perovskite Structure CaMnO3-δ with MgO Addition as Oxygen Carrier for Chemical Looping with Oxygen Uncoupling Using Methane and Syngas |
| title_sort | examination of perovskite structure camno3 δ with mgo addition as oxygen carrier for chemical looping with oxygen uncoupling using methane and syngas |
| url | http://dx.doi.org/10.1155/2013/679560 |
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