Tuning metal–support interactions on Ni/Al2O3 catalysts to improve catalytic activity and stability for dry reforming of methane
Ni-based catalysts supported on alumina derived from the pseudo-boehmite prepared by the impregnation method were employed for catalytic dry reforming of methane reaction at the temperature of 550–750 C. The effect of calcination temperature on physicochemical properties such as the Ni d...
| Những tác giả chính: | , , , , |
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| Định dạng: | Journal article |
| Ngôn ngữ: | English |
| Được phát hành: |
MDPI
2021
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| _version_ | 1826266429597417472 |
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| author | He, L Ren, Y Yue, B Tsang, SCE He, H |
| author_facet | He, L Ren, Y Yue, B Tsang, SCE He, H |
| author_sort | He, L |
| collection | OXFORD |
| description | Ni-based catalysts supported on alumina derived from the pseudo-boehmite prepared by the impregnation method were employed for catalytic dry reforming of methane reaction at the temperature of 550–750 C. The effect of calcination temperature on physicochemical properties such as the Ni dispersion, reduction degree, nickel crystallite sizes, and metal–support interaction of the catalysts was investigated. The characterization results show that increasing the catalyst calcination temperature leads to the formation of nickel-alumina spinel, which enhances the metal–support interaction and increases the reduction temperature. The nickel nanoparticle size decreases and the effective dispersion increases with the increasing calcination temperature from 450 C to 750 C due to the formation of nickel aluminate. The catalyst calcined at 750 C exhibits the highest CH and CO conversion owing to the small Ni active sites and high Ni dispersion. In a 200 h stability test in dry reforming of methane at 700 C, the Ni/Al O -750 catalyst exhibits excellent catalytic stability and anti-coking ability. |
| first_indexed | 2024-03-06T20:38:50Z |
| format | Journal article |
| id | oxford-uuid:339040a5-c9c4-488c-95a1-41e6b76bca4f |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:38:50Z |
| publishDate | 2021 |
| publisher | MDPI |
| record_format | dspace |
| spelling | oxford-uuid:339040a5-c9c4-488c-95a1-41e6b76bca4f2022-03-26T13:20:55ZTuning metal–support interactions on Ni/Al2O3 catalysts to improve catalytic activity and stability for dry reforming of methaneJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:339040a5-c9c4-488c-95a1-41e6b76bca4fEnglishSymplectic ElementsMDPI2021He, LRen, YYue, BTsang, SCEHe, HNi-based catalysts supported on alumina derived from the pseudo-boehmite prepared by the impregnation method were employed for catalytic dry reforming of methane reaction at the temperature of 550–750 C. The effect of calcination temperature on physicochemical properties such as the Ni dispersion, reduction degree, nickel crystallite sizes, and metal–support interaction of the catalysts was investigated. The characterization results show that increasing the catalyst calcination temperature leads to the formation of nickel-alumina spinel, which enhances the metal–support interaction and increases the reduction temperature. The nickel nanoparticle size decreases and the effective dispersion increases with the increasing calcination temperature from 450 C to 750 C due to the formation of nickel aluminate. The catalyst calcined at 750 C exhibits the highest CH and CO conversion owing to the small Ni active sites and high Ni dispersion. In a 200 h stability test in dry reforming of methane at 700 C, the Ni/Al O -750 catalyst exhibits excellent catalytic stability and anti-coking ability. |
| spellingShingle | He, L Ren, Y Yue, B Tsang, SCE He, H Tuning metal–support interactions on Ni/Al2O3 catalysts to improve catalytic activity and stability for dry reforming of methane |
| title | Tuning metal–support interactions on Ni/Al2O3 catalysts to improve catalytic activity and stability for dry reforming of methane |
| title_full | Tuning metal–support interactions on Ni/Al2O3 catalysts to improve catalytic activity and stability for dry reforming of methane |
| title_fullStr | Tuning metal–support interactions on Ni/Al2O3 catalysts to improve catalytic activity and stability for dry reforming of methane |
| title_full_unstemmed | Tuning metal–support interactions on Ni/Al2O3 catalysts to improve catalytic activity and stability for dry reforming of methane |
| title_short | Tuning metal–support interactions on Ni/Al2O3 catalysts to improve catalytic activity and stability for dry reforming of methane |
| title_sort | tuning metal support interactions on ni al2o3 catalysts to improve catalytic activity and stability for dry reforming of methane |
| work_keys_str_mv | AT hel tuningmetalsupportinteractionsonnial2o3catalyststoimprovecatalyticactivityandstabilityfordryreformingofmethane AT reny tuningmetalsupportinteractionsonnial2o3catalyststoimprovecatalyticactivityandstabilityfordryreformingofmethane AT yueb tuningmetalsupportinteractionsonnial2o3catalyststoimprovecatalyticactivityandstabilityfordryreformingofmethane AT tsangsce tuningmetalsupportinteractionsonnial2o3catalyststoimprovecatalyticactivityandstabilityfordryreformingofmethane AT heh tuningmetalsupportinteractionsonnial2o3catalyststoimprovecatalyticactivityandstabilityfordryreformingofmethane |