Promotion Effect of CaO Modification on Mesoporous Al2O3-Supported Ni Catalysts for CO2 Methanation
The catalysts Ni/Al2O3 and CaO modified Ni/Al2O3 were prepared by impregnation method and applied for methanation of CO2. The catalysts were characterized by N2 adsorption/desorption, temperature-programmed reduction of H2 (H2-TPR), X-ray diffraction (XRD), and temperature-programmed desorption of C...
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| Format: | Article |
| Language: | English |
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Wiley
2016-01-01
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| Series: | International Journal of Chemical Engineering |
| Online Access: | http://dx.doi.org/10.1155/2016/2041821 |
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| author | Wen Yang Yanyan Feng Wei Chu |
| author_facet | Wen Yang Yanyan Feng Wei Chu |
| author_sort | Wen Yang |
| collection | DOAJ |
| description | The catalysts Ni/Al2O3 and CaO modified Ni/Al2O3 were prepared by impregnation method and applied for methanation of CO2. The catalysts were characterized by N2 adsorption/desorption, temperature-programmed reduction of H2 (H2-TPR), X-ray diffraction (XRD), and temperature-programmed desorption of CO2 and H2 (CO2-TPD and H2-TPD) techniques, respectively. TPR and XRD results indicated that CaO can effectively restrain the growth of NiO nanoparticles, improve the dispersion of NiO, and weaken the interaction between NiO and Al2O3. CO2-TPD and H2-TPD results suggested that CaO can change the environment surrounding of CO2 and H2 adsorption and thus the reactants on the Ni atoms can be activated more easily. The modified Ni/Al2O3 showed better catalytic activity than pure Ni/Al2O3. Ni/CaO-Al2O3 showed high CO2 conversion especially at low temperatures compared to Ni/Al2O3, and the selectivity to CH4 was very close to 1. The high CO2 conversion over Ni/CaO-Al2O3 was mainly caused by the surface coverage by CO2-derived species on CaO-Al2O3 surface. |
| format | Article |
| id | doaj-art-93a6ad029cfb46d9a2462b9c9e2b5fae |
| institution | Kabale University |
| issn | 1687-806X 1687-8078 |
| language | English |
| publishDate | 2016-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Chemical Engineering |
| spelling | doaj-art-93a6ad029cfb46d9a2462b9c9e2b5fae2025-02-03T06:43:47ZengWileyInternational Journal of Chemical Engineering1687-806X1687-80782016-01-01201610.1155/2016/20418212041821Promotion Effect of CaO Modification on Mesoporous Al2O3-Supported Ni Catalysts for CO2 MethanationWen Yang0Yanyan Feng1Wei Chu2Department of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541006, ChinaDepartment of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541006, ChinaDepartment of Chemical Engineering, Sichuan University, Chengdu 610065, ChinaThe catalysts Ni/Al2O3 and CaO modified Ni/Al2O3 were prepared by impregnation method and applied for methanation of CO2. The catalysts were characterized by N2 adsorption/desorption, temperature-programmed reduction of H2 (H2-TPR), X-ray diffraction (XRD), and temperature-programmed desorption of CO2 and H2 (CO2-TPD and H2-TPD) techniques, respectively. TPR and XRD results indicated that CaO can effectively restrain the growth of NiO nanoparticles, improve the dispersion of NiO, and weaken the interaction between NiO and Al2O3. CO2-TPD and H2-TPD results suggested that CaO can change the environment surrounding of CO2 and H2 adsorption and thus the reactants on the Ni atoms can be activated more easily. The modified Ni/Al2O3 showed better catalytic activity than pure Ni/Al2O3. Ni/CaO-Al2O3 showed high CO2 conversion especially at low temperatures compared to Ni/Al2O3, and the selectivity to CH4 was very close to 1. The high CO2 conversion over Ni/CaO-Al2O3 was mainly caused by the surface coverage by CO2-derived species on CaO-Al2O3 surface.http://dx.doi.org/10.1155/2016/2041821 |
| spellingShingle | Wen Yang Yanyan Feng Wei Chu Promotion Effect of CaO Modification on Mesoporous Al2O3-Supported Ni Catalysts for CO2 Methanation International Journal of Chemical Engineering |
| title | Promotion Effect of CaO Modification on Mesoporous Al2O3-Supported Ni Catalysts for CO2 Methanation |
| title_full | Promotion Effect of CaO Modification on Mesoporous Al2O3-Supported Ni Catalysts for CO2 Methanation |
| title_fullStr | Promotion Effect of CaO Modification on Mesoporous Al2O3-Supported Ni Catalysts for CO2 Methanation |
| title_full_unstemmed | Promotion Effect of CaO Modification on Mesoporous Al2O3-Supported Ni Catalysts for CO2 Methanation |
| title_short | Promotion Effect of CaO Modification on Mesoporous Al2O3-Supported Ni Catalysts for CO2 Methanation |
| title_sort | promotion effect of cao modification on mesoporous al2o3 supported ni catalysts for co2 methanation |
| url | http://dx.doi.org/10.1155/2016/2041821 |
| work_keys_str_mv | AT wenyang promotioneffectofcaomodificationonmesoporousal2o3supportednicatalystsforco2methanation AT yanyanfeng promotioneffectofcaomodificationonmesoporousal2o3supportednicatalystsforco2methanation AT weichu promotioneffectofcaomodificationonmesoporousal2o3supportednicatalystsforco2methanation |