151259 20251017144546.0 doi 10.1016/j.cattod.2013.08.014 sideral 87028 ART-2014-87028 eng Usón, Laura Universidad de Zaragoza (orcid)0000-0002-4678-7465 VOCs abatement using thick eggshell Pt/SBA-15 pellets with hierarchical porosity 2014 Mechanically stable 3-D pellets made of mesoporous SBA-15 silica fibers containing highly dispersedplatinum nanoparticles have been successfully synthesized with the aid of a sacrificial polyacrylamidenetwork using a gel-casting deposition technique. The pellets exhibit a hierarchical porosity, with spacesof 3 microns among the silica fibers, and a core–shell distribution of Pt, with an outer Pt-rich layer of 450microns accounting for over 73% of the Pt. Both factors (hierarchical structure and concentration of thecatalyst on the outer pellet surface) facilitated reactant access to the catalyst centers, and as a consequencean excellent catalytic activity toward the total oxidation of n-hexane, used as a VOC model. There was nomeasurable loss of activity after 70 h on stream and the subsequent examination of the catalyst revealedthat interparticle coalescence of Pt nanoparticles was largely prevented due to the encapsulation of thenoble-metal particles within the silica mesochannels. info:eu-repo/grantAgreement/ES/MICINN/MAT2011-24988 info:eu-repo/semantics/closedAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es 3.893 2014 CHEMISTRY, APPLIED 6 / 72 = 0.083 2014 Q1 T1 ENGINEERING, CHEMICAL 11 / 135 = 0.081 2014 Q1 T1 CHEMISTRY, PHYSICAL 37 / 138 = 0.268 2014 Q2 T1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Colmenares, María Gracia Hueso, José L. (orcid)0000-0002-4546-4111 Sebastián, Víctor Universidad de Zaragoza (orcid)0000-0002-6873-5244 Balas, Francisco Universidad de Zaragoza (orcid)0000-0001-5512-0075 Arruebo, Manuel Universidad de Zaragoza (orcid)0000-0003-3165-0156 Santamaría, Jesús Universidad de Zaragoza (orcid)0000-0002-8701-9745 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 227 (2014), 179-186 Catal. today Catalysis Today 0920-5861 447345 http://zaguan.unizar.es/record/151259/files/texto_completo.pdf Versión publicada 2805278 http://zaguan.unizar.es/record/151259/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:151259 articulos driver 2025-10-17-14:09:59 ARTICLE