Assessing the effect of acid and alkali treatment on a halloysite-based catalyst for dry reforming of methane
<p dir="ltr">Dry reforming of methane (DRM) has recently received wide attention owing to its outstanding performance in the reduction and conversion of CH<sub>4</sub> and CO<sub>2</sub> to syngas (H<sub>2</sub> and CO). From an industrial perspect...
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| مؤلفون آخرون: | , , , , , |
| منشور في: |
2024
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| _version_ | 1864513509847465984 |
|---|---|
| author | Ahmed Abotaleb (9596108) |
| author2 | Dema Al-Masri (19256085) Alaa Alkhateb (19256086) Kamal Mroue (14152491) Atef Zekri (14156904) Yasmin Mashhour (19256090) Alessandro Sinopoli (4318555) |
| author2_role | author author author author author author |
| author_facet | Ahmed Abotaleb (9596108) Dema Al-Masri (19256085) Alaa Alkhateb (19256086) Kamal Mroue (14152491) Atef Zekri (14156904) Yasmin Mashhour (19256090) Alessandro Sinopoli (4318555) |
| author_role | author |
| dc.creator.none.fl_str_mv | Ahmed Abotaleb (9596108) Dema Al-Masri (19256085) Alaa Alkhateb (19256086) Kamal Mroue (14152491) Atef Zekri (14156904) Yasmin Mashhour (19256090) Alessandro Sinopoli (4318555) |
| dc.date.none.fl_str_mv | 2024-02-05T00:00:00Z |
| dc.identifier.none.fl_str_mv | 10.1039/d3ra07990b |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/journal_contribution/Assessing_the_effect_of_acid_and_alkali_treatment_on_a_halloysite-based_catalyst_for_dry_reforming_of_methane/26403502 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Chemical sciences Physical chemistry Engineering Chemical engineering Materials engineering Dry Reforming of Methane (DRM) Catalyst Supports Catalyst Deactivation X-ray Diffraction (XRD) CO2 and CH4 Conversion Transmission Electron Microscopy (TEM) Molten Salt Method |
| dc.title.none.fl_str_mv | Assessing the effect of acid and alkali treatment on a halloysite-based catalyst for dry reforming of methane |
| dc.type.none.fl_str_mv | Text Journal contribution info:eu-repo/semantics/publishedVersion text contribution to journal |
| description | <p dir="ltr">Dry reforming of methane (DRM) has recently received wide attention owing to its outstanding performance in the reduction and conversion of CH<sub>4</sub> and CO<sub>2</sub> to syngas (H<sub>2</sub> and CO). From an industrial perspective, nickel (Ni)-supported catalysts have been deemed among the most suitable catalysts for DRM owing to their low cost and high activity compared to noble metals. However, a downside of nickel catalysts is their high susceptibility to deactivation due to coke formation and sintering at high temperatures. Using appropriate supports and preparation methods plays a major role in improving the activity and stability of Ni-supported catalysts. Halloysite nanotubes (HNTs) are largely utilized in catalysis as a support for Ni owing to their abundance, low cost, and ease of preparation. The treatment of HNTs (chemical or physical) prior to doping with Ni is considered a suitable method for increasing the overall performance of the catalyst. In this study, the surface of HNTs was activated with acids (HNO<sub>3</sub> and H<sub>2</sub>SO<sub>4</sub>) and alkalis (NaOH and Na<sub>2</sub>CO<sub>3</sub> + NaNO<sub>3</sub>) prior to Ni doping to assess the effects of support treatment on the stability, activity, and longevity of the catalyst. Nickel catalysts on raw HNT, acid-treated HNT, and alkali-treated HNT supports were prepared via wet impregnation. A detailed characterization of the catalysts was conducted using X-ray diffraction (XRD), BET surface area analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM), solid-state nuclear magnetic resonance (ssNMR), H<sub>2</sub>-temperature programmed reduction, (H<sub>2</sub>-TPR), CO<sub>2</sub>-temperature programmed desorption (CO<sub>2</sub>-TPD), and Ni-dispersion via H<sub>2</sub>-pulse chemisorption. Our results reveal a clear alteration in the structure of HNTs after treatment, while elemental mapping shows a uniform distribution of Ni throughout all the different supports. Moreover, the supports treated with a molten salt method resulted in the overall highest CO<sub>2</sub> and CH<sub>4</sub> conversion among the studied catalysts and exhibited high stability over 24 hours testing.</p><h2>Other Information</h2><p dir="ltr">Published in: RSC Advances<br>License: <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank">https://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://doi.org/10.1039/D3RA07990B" target="_blank">https://doi.org/10.1039/D3RA07990B</a></p><p dir="ltr">Additional institutions affiliated with: Core Labs - HBKU</p> |
| eu_rights_str_mv | openAccess |
| id | Manara2_ea69a10026283554c5134a4ad7fb1d34 |
| identifier_str_mv | 10.1039/d3ra07990b |
| network_acronym_str | Manara2 |
| network_name_str | Manara2 |
| oai_identifier_str | oai:figshare.com:article/26403502 |
| publishDate | 2024 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Assessing the effect of acid and alkali treatment on a halloysite-based catalyst for dry reforming of methaneAhmed Abotaleb (9596108)Dema Al-Masri (19256085)Alaa Alkhateb (19256086)Kamal Mroue (14152491)Atef Zekri (14156904)Yasmin Mashhour (19256090)Alessandro Sinopoli (4318555)Chemical sciencesPhysical chemistryEngineeringChemical engineeringMaterials engineeringDry Reforming of Methane (DRM)Catalyst SupportsCatalyst DeactivationX-ray Diffraction (XRD)CO2 and CH4 ConversionTransmission Electron Microscopy (TEM)Molten Salt Method<p dir="ltr">Dry reforming of methane (DRM) has recently received wide attention owing to its outstanding performance in the reduction and conversion of CH<sub>4</sub> and CO<sub>2</sub> to syngas (H<sub>2</sub> and CO). From an industrial perspective, nickel (Ni)-supported catalysts have been deemed among the most suitable catalysts for DRM owing to their low cost and high activity compared to noble metals. However, a downside of nickel catalysts is their high susceptibility to deactivation due to coke formation and sintering at high temperatures. Using appropriate supports and preparation methods plays a major role in improving the activity and stability of Ni-supported catalysts. Halloysite nanotubes (HNTs) are largely utilized in catalysis as a support for Ni owing to their abundance, low cost, and ease of preparation. The treatment of HNTs (chemical or physical) prior to doping with Ni is considered a suitable method for increasing the overall performance of the catalyst. In this study, the surface of HNTs was activated with acids (HNO<sub>3</sub> and H<sub>2</sub>SO<sub>4</sub>) and alkalis (NaOH and Na<sub>2</sub>CO<sub>3</sub> + NaNO<sub>3</sub>) prior to Ni doping to assess the effects of support treatment on the stability, activity, and longevity of the catalyst. Nickel catalysts on raw HNT, acid-treated HNT, and alkali-treated HNT supports were prepared via wet impregnation. A detailed characterization of the catalysts was conducted using X-ray diffraction (XRD), BET surface area analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM), solid-state nuclear magnetic resonance (ssNMR), H<sub>2</sub>-temperature programmed reduction, (H<sub>2</sub>-TPR), CO<sub>2</sub>-temperature programmed desorption (CO<sub>2</sub>-TPD), and Ni-dispersion via H<sub>2</sub>-pulse chemisorption. Our results reveal a clear alteration in the structure of HNTs after treatment, while elemental mapping shows a uniform distribution of Ni throughout all the different supports. Moreover, the supports treated with a molten salt method resulted in the overall highest CO<sub>2</sub> and CH<sub>4</sub> conversion among the studied catalysts and exhibited high stability over 24 hours testing.</p><h2>Other Information</h2><p dir="ltr">Published in: RSC Advances<br>License: <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank">https://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://doi.org/10.1039/D3RA07990B" target="_blank">https://doi.org/10.1039/D3RA07990B</a></p><p dir="ltr">Additional institutions affiliated with: Core Labs - HBKU</p>2024-02-05T00:00:00ZTextJournal contributioninfo:eu-repo/semantics/publishedVersiontextcontribution to journal10.1039/d3ra07990bhttps://figshare.com/articles/journal_contribution/Assessing_the_effect_of_acid_and_alkali_treatment_on_a_halloysite-based_catalyst_for_dry_reforming_of_methane/26403502CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/264035022024-02-05T00:00:00Z |
| spellingShingle | Assessing the effect of acid and alkali treatment on a halloysite-based catalyst for dry reforming of methane Ahmed Abotaleb (9596108) Chemical sciences Physical chemistry Engineering Chemical engineering Materials engineering Dry Reforming of Methane (DRM) Catalyst Supports Catalyst Deactivation X-ray Diffraction (XRD) CO2 and CH4 Conversion Transmission Electron Microscopy (TEM) Molten Salt Method |
| status_str | publishedVersion |
| title | Assessing the effect of acid and alkali treatment on a halloysite-based catalyst for dry reforming of methane |
| title_full | Assessing the effect of acid and alkali treatment on a halloysite-based catalyst for dry reforming of methane |
| title_fullStr | Assessing the effect of acid and alkali treatment on a halloysite-based catalyst for dry reforming of methane |
| title_full_unstemmed | Assessing the effect of acid and alkali treatment on a halloysite-based catalyst for dry reforming of methane |
| title_short | Assessing the effect of acid and alkali treatment on a halloysite-based catalyst for dry reforming of methane |
| title_sort | Assessing the effect of acid and alkali treatment on a halloysite-based catalyst for dry reforming of methane |
| topic | Chemical sciences Physical chemistry Engineering Chemical engineering Materials engineering Dry Reforming of Methane (DRM) Catalyst Supports Catalyst Deactivation X-ray Diffraction (XRD) CO2 and CH4 Conversion Transmission Electron Microscopy (TEM) Molten Salt Method |