Methane decomposition over high-loaded Ni-Cu-SiO2 catalysts
| Autor: | Liang Dong, Wang Heyi, Linjie Zhao, Yong Yang, Shuming Peng, Yang Du, Liangping Xiong, Jiamao Li, Jianchao He |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Hydrogen
Mechanical Engineering 05 social sciences Inorganic chemistry chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Methane Catalysis Methane decomposition chemistry.chemical_compound Nuclear Energy and Engineering chemistry 0502 economics and business General Materials Science 050207 economics 0210 nano-technology Catalytic decomposition Carbon Civil and Structural Engineering |
| Zdroj: | Fusion Engineering and Design. 113:279-287 |
| ISSN: | 0920-3796 |
| DOI: | 10.1016/j.fusengdes.2016.06.046 |
| Popis: | The performance of Ni-SiO2 and Ni-Cu-SiO2 during repeated catalytic decomposition of methane (CDM) reactions and subsequent regeneration of the deactivated catalysts with air has been studied. The catalytic activity of the 75%Ni-25%SiO2 catalyst in the second and third CDM was lower than that during the first, while the lifetime of the catalyst did not change significantly. Both the lifetime and the catalytic activity of 65%Ni-10%Cu-25%SiO2 in the second and third CDM reactions decreased significantly. 55%Ni-20%Cu-25%SiO2 showed better performance than the other two catalysts, and its activity and lifetime did not change significantly until the third CDM reaction. The hydrogen yields of 55%Ni-20%Cu-25%SiO2 were 56.8 gH2/gcat., 42.8 gH2/gcat., and 2.4 gH2/gcat. for the first, second, and third CDM reactions, respectively. Spherical carbon structures were observed on the catalysts following all three CDM reactions over 75%Ni-25%SiO2. However, similar carbon structures were only observed following the second and third CDM over 65%Ni-10%Cu-25%SiO2, and only following the third cycle with 55%Ni-20%Cu-25%SiO2. The formation of spherical carbon during the repeated CDM reactions strongly influenced the performance of the catalysts. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect