Catalytic performance and regenerability of Ni/CeZrSmOx catalysts for dry reforming of methane
The effect of zirconium and samarium as promoters and dopants of Ni/CeO2 catalysts for dry reforming of methane (DRM) has been investigated. The catalysts were prepared by coprecipitation within inverse microemulsions, which allow achieving good structural homogeneity and surface area. They were cha...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-08-01
|
| Series: | Journal of CO2 Utilization |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2212982025001301 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849688069080350720 |
|---|---|
| author | K.C. Pájaro R. de Antonio A. Martínez-Arias V. Cortés Corberán |
| author_facet | K.C. Pájaro R. de Antonio A. Martínez-Arias V. Cortés Corberán |
| author_sort | K.C. Pájaro |
| collection | DOAJ |
| description | The effect of zirconium and samarium as promoters and dopants of Ni/CeO2 catalysts for dry reforming of methane (DRM) has been investigated. The catalysts were prepared by coprecipitation within inverse microemulsions, which allow achieving good structural homogeneity and surface area. They were characterized using nitrogen adsorption-desorption isotherms, X-ray diffraction (XRD), temperature programmed reduction (TPR), temperature programmed oxidation (TPO), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The catalysts, preactivated in a flow of 10 % O2/He and further under the reactant stream, have been tested in DRM, using samples both fresh and upon regeneration after their first use at 700 ºC for 5 h at atmospheric pressure. The effect of spatial velocity has been also investigated. Different catalytic properties are revealed as a function of the nature of the support in each case. While the undoped Ni-Ce catalyst exhibits high DRM activity, its deactivation is shown to depend on the spatial velocity applied, and a relatively high stability is observed at high contact time. While all systems suffer deactivation caused by the formation of carbon deposits as well as sintering of the nickel and support, the presence of zirconium is shown to provide a higher stability to the systems as a consequence of enhanced redox properties and lower nickel size, which can limit deactivation by carbon deposits. In contrast, a relatively higher deactivation due to carbon deposits is observed upon doping with samarium. |
| format | Article |
| id | doaj-art-2eb27d61af0f4a6fb2288d83bd88dd50 |
| institution | DOAJ |
| issn | 2212-9839 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of CO2 Utilization |
| spelling | doaj-art-2eb27d61af0f4a6fb2288d83bd88dd502025-08-20T03:22:08ZengElsevierJournal of CO2 Utilization2212-98392025-08-019810314610.1016/j.jcou.2025.103146Catalytic performance and regenerability of Ni/CeZrSmOx catalysts for dry reforming of methaneK.C. Pájaro0R. de Antonio1A. Martínez-Arias2V. Cortés Corberán3Instituto de Catálisis y Petroleoquímica, CSIC, Marie Curie 2, Madrid 28049, Spain; LICATUC, Universidad de Cartagena, Cartagena de Indias 130015, ColombiaInstituto de Catálisis y Petroleoquímica, CSIC, Marie Curie 2, Madrid 28049, SpainInstituto de Catálisis y Petroleoquímica, CSIC, Marie Curie 2, Madrid 28049, Spain; Corresponding authors.Instituto de Catálisis y Petroleoquímica, CSIC, Marie Curie 2, Madrid 28049, Spain; Corresponding authors.The effect of zirconium and samarium as promoters and dopants of Ni/CeO2 catalysts for dry reforming of methane (DRM) has been investigated. The catalysts were prepared by coprecipitation within inverse microemulsions, which allow achieving good structural homogeneity and surface area. They were characterized using nitrogen adsorption-desorption isotherms, X-ray diffraction (XRD), temperature programmed reduction (TPR), temperature programmed oxidation (TPO), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The catalysts, preactivated in a flow of 10 % O2/He and further under the reactant stream, have been tested in DRM, using samples both fresh and upon regeneration after their first use at 700 ºC for 5 h at atmospheric pressure. The effect of spatial velocity has been also investigated. Different catalytic properties are revealed as a function of the nature of the support in each case. While the undoped Ni-Ce catalyst exhibits high DRM activity, its deactivation is shown to depend on the spatial velocity applied, and a relatively high stability is observed at high contact time. While all systems suffer deactivation caused by the formation of carbon deposits as well as sintering of the nickel and support, the presence of zirconium is shown to provide a higher stability to the systems as a consequence of enhanced redox properties and lower nickel size, which can limit deactivation by carbon deposits. In contrast, a relatively higher deactivation due to carbon deposits is observed upon doping with samarium.http://www.sciencedirect.com/science/article/pii/S2212982025001301SyngasDry reformingMethaneCarbon dioxideNickelCerium |
| spellingShingle | K.C. Pájaro R. de Antonio A. Martínez-Arias V. Cortés Corberán Catalytic performance and regenerability of Ni/CeZrSmOx catalysts for dry reforming of methane Journal of CO2 Utilization Syngas Dry reforming Methane Carbon dioxide Nickel Cerium |
| title | Catalytic performance and regenerability of Ni/CeZrSmOx catalysts for dry reforming of methane |
| title_full | Catalytic performance and regenerability of Ni/CeZrSmOx catalysts for dry reforming of methane |
| title_fullStr | Catalytic performance and regenerability of Ni/CeZrSmOx catalysts for dry reforming of methane |
| title_full_unstemmed | Catalytic performance and regenerability of Ni/CeZrSmOx catalysts for dry reforming of methane |
| title_short | Catalytic performance and regenerability of Ni/CeZrSmOx catalysts for dry reforming of methane |
| title_sort | catalytic performance and regenerability of ni cezrsmox catalysts for dry reforming of methane |
| topic | Syngas Dry reforming Methane Carbon dioxide Nickel Cerium |
| url | http://www.sciencedirect.com/science/article/pii/S2212982025001301 |
| work_keys_str_mv | AT kcpajaro catalyticperformanceandregenerabilityofnicezrsmoxcatalystsfordryreformingofmethane AT rdeantonio catalyticperformanceandregenerabilityofnicezrsmoxcatalystsfordryreformingofmethane AT amartinezarias catalyticperformanceandregenerabilityofnicezrsmoxcatalystsfordryreformingofmethane AT vcortescorberan catalyticperformanceandregenerabilityofnicezrsmoxcatalystsfordryreformingofmethane |