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| Complete Oxidation of Methane Alumina Modified with Calcium, over Palladium Supported on Lanthanum, and Cerium Ions | |
| 作者姓名： | Beata Stasinska Wojciech Gac Theophilos Ioannides Andrzej Machocki |
| 作者单位： | [1]University of Maria Curie-Sklodowska, Faculty of Chemistry, Department of Chemical Technology, 3 Maria Curie-Sklodowska Square, 20-031 Lublin, Poland [2]Foundation for Research ＆ Technology-Hellas, Institute of Chemical Engineering and High Temperature Chemical Processes （FORTH/ICE-HT）, P.O. Box 1414, Patras, GR-B6500, Greece |
| 基金项目： | Acknowledgements The authors acknowledge the financial support from the General Secretariat for Research and Technology of Greece and the Ministry of Education and Science of Poland in the frame of the Polish-Greek Scientific and Technological Programme. |
| 摘 要： | The activity and thermal stability of Pd/Al2O3 and Pd/（Al2O3＋MOx） （M=Ca, La, Ce） palladium catalysts in the reaction of complete oxidation of methane are presented in this study. The catalyst supports were prepared by sol-gel method and they were dried either conventionally or with supercritical carbon dioxide. Then they were impregnated with palladium nitrate solution. The catalysts with unmodified alumina had a high surface area. The activity and thermal stability of the aluminasupported catalyst was also very high. The introduction of calcium, lanthanum, or cerium oxide into alumina support caused a decrease of the surface area in the way dependent on the support precursor drying method. These modifiers decreased the activity of palladium catalysts, and they required higher temperatures for the complete oxidation of methane than unmodified Pd/Al2O3. The improvement of the palladium activity by lanthanum and cerium support modifier was observed only at low temperatures of the reaction. |
| 关 键 词： | 甲烷 氧化反应 钯 催化剂 氧化铝 |
| 收稿时间： | 2007-05-25 |
| 修稿时间： | 2007-08-27 |
Complete Oxidation of Methane over Palladium Supported on Alumina Modified with Calcium, Lanthanum, and Cerium Ions |
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| Beata Stasinska Wojciech Gac Theophilos Ioannides Andrzej Machocki.Complete Oxidation of Methane Alumina Modified with Calcium, over Palladium Supported on Lanthanum, and Cerium Ions[J].Journal of Natural Gas Chemistry,2007,16(4):342-348. | |
| Authors: | Beata Stasinska Wojciech Gac Theophilos Ioannides Andrzej Machocki |
| Institution: | aUniversity of Maria Curie-Sklodowska, Faculty of Chemistry, Department of Chemical Technology 3 Maria Curie-Sklodowska Square, 20-031 Lublin, Poland bFoundation for Research & Technology-Hellas, Institute of Chemical Engineering and High Temperature Chemical Processes (FORTH/ICE-HT), P.O. Box 1414, Patras, GR-26500, Greece |
| Abstract: | The activity and thermal stability of Pd/Al2O3 and Pd/(Al2O3 MOx) (M=Ca, La, Ce) palladium catalysts in the reaction of complete oxidation of methane are presented in this study. The catalyst supports were prepared by sol-gel method and they were dried either conventionally or with supercritical carbon dioxide. Then they were impregnated with palladium nitrate solution. The catalysts with unmodified alumina had a high surface area. The activity and thermal stability of the alumina-supported catalyst was also very high. The introduction of calcium, lanthanum, or cerium oxide into alumina support caused a decrease of the surface area in the way dependent on the support precursor drying method. These modifiers decreased the activity of palladium catalysts, and they required higher temperatures for the complete oxidation of methane than unmodified Pd/Al2O3. The improvement of the palladium activity by lanthanum and cerium support modifier was observed only at low temperatures of the reaction. |
| Keywords: | catalytic oxidation of methane palladium catalysts alumina support modification lan- thanum modifier cerium modifier calcium modifier |
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