96830 20201124104757.0 doi 10.3390/catal9080676 sideral 115019 ART-2019-115019 eng Charisiou, Nikolaos D. The relationship between reaction temperature and carbon deposition on nickel catalysts based on al2o3, zro2 or sio2 supports during the biogas dry reforming reaction 2019 Access copy available to the general public Unrestricted The tackling of carbon deposition during the dry reforming of biogas (BDR) necessitates research of the surface of spent catalysts in an effort to obtain a better understanding of the effect that different carbon allotropes have on the deactivation mechanism and correlation of their formation with catalytic properties. The work presented herein provides a comparative assessment of catalytic stability in relation to carbon deposition and metal particle sintering on un-promoted Ni/Al2O3, Ni/ZrO2 and Ni/SiO2 catalysts for different reaction temperatures. The spent catalysts were examined using thermogravimetric analysis (TGA), Raman spectroscopy, high angle annular dark field scanning transmission electron microscopy (STEM-HAADF) and X-ray photoelectron spectroscopy (XPS). The results show that the formation and nature of carbonaceous deposits on catalytic surfaces (and thus catalytic stability) depend on the interplay of a number of crucial parameters such as metal support interaction, acidity/basicity characteristics, O2– lability and active phase particle size. When a catalytic system possesses only some of these beneficial characteristics, then competition with adverse effects may overshadow any potential benefits. info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 3.52 2019 CHEMISTRY, PHYSICAL 65 / 159 = 0.409 2019 Q2 T2 0.722 2019 Physical and Theoretical Chemistry 2019 Q2 Catalysis 2019 Q3 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Douvartzides, Savvas L. Siakavelas, Georgios I. Tzounis, Lazaros (orcid)0000-0002-6873-5244 Sebastian, Victor Universidad de Zaragoza Stolojan, Vlad Hinder, Steven J. Baker, Mark A. Polychronopoulou, Kyriaki Goula, María A. 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 9, 8 (2019), 676 [22 pp] Catalysts CATALYSTS 2073-4344 2358135 http://zaguan.unizar.es/record/96830/files/texto_completo.pdf Versión publicada 457976 http://zaguan.unizar.es/record/96830/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:96830 articulos driver 2020-11-22-12:40:18 ARTICLE