NiO reduction with hydrogen and light hydrocarbons: Contrast between SiO2-supported and unsupported NiO nanoparticles
The reduction of solid metal oxide by hydrogen or hydrocarbon gases represents a class of reactions that are important to various technological applications. This study investigates the reduction of unsupported NiO nanoparticles and silica-supported NiO with different reducing gases (hydrogen, metha...
| Main Authors: | , |
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| Format: | Journal Article |
| Published: |
Elsevier B.V.
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/21930 |
| _version_ | 1848750728533770240 |
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| author | Syed-Hassan, Syed Li, Chun-Zhu |
| author_facet | Syed-Hassan, Syed Li, Chun-Zhu |
| author_sort | Syed-Hassan, Syed |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The reduction of solid metal oxide by hydrogen or hydrocarbon gases represents a class of reactions that are important to various technological applications. This study investigates the reduction of unsupported NiO nanoparticles and silica-supported NiO with different reducing gases (hydrogen, methane and ethane) in the temperature range of 500–600 °C. It was found that, in addition to the reaction and mass transfer of molecular species, the fates and activities of surface-formed radical species have to be considered in explaining the kinetics of nickel oxide reduction. It is believed that the desorption of hydrocarbon radicals from the particle surface has significantly slowed down the reduction of unsupported NiO nanoparticles. The ease with which a radical migrates from its generation site on a metallic island to the Ni–NiO surface boundary, on the other hand, is an important rate-determining factor in the reduction of silica-supported NiO. |
| first_indexed | 2025-11-14T07:41:27Z |
| format | Journal Article |
| id | curtin-20.500.11937-21930 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:41:27Z |
| publishDate | 2011 |
| publisher | Elsevier B.V. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-219302017-09-13T13:54:25Z NiO reduction with hydrogen and light hydrocarbons: Contrast between SiO2-supported and unsupported NiO nanoparticles Syed-Hassan, Syed Li, Chun-Zhu The reduction of solid metal oxide by hydrogen or hydrocarbon gases represents a class of reactions that are important to various technological applications. This study investigates the reduction of unsupported NiO nanoparticles and silica-supported NiO with different reducing gases (hydrogen, methane and ethane) in the temperature range of 500–600 °C. It was found that, in addition to the reaction and mass transfer of molecular species, the fates and activities of surface-formed radical species have to be considered in explaining the kinetics of nickel oxide reduction. It is believed that the desorption of hydrocarbon radicals from the particle surface has significantly slowed down the reduction of unsupported NiO nanoparticles. The ease with which a radical migrates from its generation site on a metallic island to the Ni–NiO surface boundary, on the other hand, is an important rate-determining factor in the reduction of silica-supported NiO. 2011 Journal Article http://hdl.handle.net/20.500.11937/21930 10.1016/j.apcata.2011.03.033 Elsevier B.V. restricted |
| spellingShingle | Syed-Hassan, Syed Li, Chun-Zhu NiO reduction with hydrogen and light hydrocarbons: Contrast between SiO2-supported and unsupported NiO nanoparticles |
| title | NiO reduction with hydrogen and light hydrocarbons: Contrast between SiO2-supported and unsupported NiO nanoparticles |
| title_full | NiO reduction with hydrogen and light hydrocarbons: Contrast between SiO2-supported and unsupported NiO nanoparticles |
| title_fullStr | NiO reduction with hydrogen and light hydrocarbons: Contrast between SiO2-supported and unsupported NiO nanoparticles |
| title_full_unstemmed | NiO reduction with hydrogen and light hydrocarbons: Contrast between SiO2-supported and unsupported NiO nanoparticles |
| title_short | NiO reduction with hydrogen and light hydrocarbons: Contrast between SiO2-supported and unsupported NiO nanoparticles |
| title_sort | nio reduction with hydrogen and light hydrocarbons: contrast between sio2-supported and unsupported nio nanoparticles |
| url | http://hdl.handle.net/20.500.11937/21930 |