Szczegóły publikacji
Opis bibliograficzny
Ce- and Y-modified double-layered hydroxides as catalysts for dry reforming of methane: on the effect of yttrium promotion / Katarzyna ŚWIRK, Magnus Rønning, Monika MOTAK, Patricia Beaunier, Patrick Da Costa, Teresa GRZYBEK // Catalysts [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 2073-4344. — 2019 — vol. 9 iss. 1 art. no. 56, s. 1–18. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 16–18, Abstr. — Publikacja dostępna online od: 2019-01-08. — K. Świrk - pierwsza afiliacja: Sorbonne Université, France
Autorzy (6)
- AGHŚwirk Katarzyna
- Rønning Magnus
- AGHMotak Monika
- Beaunier Patricia
- Da Costa Patrick
- AGHGrzybek Teresa
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 119984 |
|---|---|
| Data dodania do BaDAP | 2019-05-21 |
| Tekst źródłowy | URL |
| DOI | 10.3390/catal9010056 |
| Rok publikacji | 2019 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Catalysts |
Abstract
Ce- and Y-promoted double-layered hydroxides were synthesized and tested in dry reforming of methane (CH4/CO2 = 1/1). The characterization of the catalysts was performed using X-ray fluorescence (XRF), X-ray diffraction (XRD), N2 sorption, temperature-programmed reduction in H2 (TPR-H2), temperature-programmed desorption of CO2 (TPD-CO2), H2 chemisorption, thermogravimetric analysis coupled by mass spectrometry (TGA/MS), Raman, and high-resolution transmission electron microscopy (HRTEM). The promotion with cerium influences textural properties, improves the Ni dispersion, decreases the number of total basic sites, and increases the reduction temperature of nickel species. After promotion with yttrium, the increase in basicity is not directly correlated with the increasing Y loading on the contrary of Ni dispersion. Dry reforming of methane (DRM) was performed as a function of temperature and in isothermal conditions at 700 °C for 5 h. For catalytic tests, a slight increase of the activity is observed for both Y and Ce doped catalysts. This improvement can of course be explained by Ni dispersion, which was found higher for both Y and Ce promoted catalysts. During DRM, the H2/CO ratio was found below unity, which can be explained by side reactions occurrence. These side reactions are linked with the increase of CO2 conversion and led to carbon deposition. By HRTEM, only multi-walled and helical-shaped carbon nanotubes were identified on Y and Ce promoted catalysts. Finally, from Raman spectroscopy, it was found that on Y and Ce promoted catalysts, the formed C is less graphitic as compared to only Ce-based catalyst.
