75606 20191122145055.0 doi 10.1021/acs.energyfuels.7b02796 sideral 102100 ART-2018-102100 eng Ahmed, M. H. M. Stability Assessment of Regenerated Hierarchical ZSM-48 Zeolite Designed by Post-Synthesis Treatment for Catalytic Cracking of Light Naphtha 2018 Access copy available to the general public Unrestricted Hierarchical ZSM-48, a one-dimensional pore system zeolite with the presence of mesopores, was obtained by post-synthesis alkaline and acid treatments. Hierarchical ZSM-48 exhibited excellent hexane cracking activity compared to parent ZSM-48, which can be attributed to better diffusion as a result of the created mesoporosity. Moreover, the post-synthesis treatment allowed for manipulation of the distribution of active sites. Consequently, better stability and higher propylene selectivity were accomplished. The spent catalyst was regenerated by removing the deposited coke from the pores, and the regenerated catalyst was characterized again to investigate the recyclability of the hierarchical structure achieved. Parent ZSM-48 showed the same textural and acidic properties after regeneration, while the structure of the post-treated sample suffered from serious defects. The defects severely decreased the number of active sites as measured by pyridine Fourier transform infrared spectroscopy and caused major structural collapse as observed by scanning electron microscopy and transmission electron microscopy. info:eu-repo/grantAgreement/ES/ISCIII/CIBER-BBN info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 3.021 2018 ENGINEERING, CHEMICAL 46 / 138 = 0.333 2018 Q2 T2 ENERGY & FUELS 52 / 103 = 0.505 2018 Q3 T2 1.035 2018 Chemical Engineering (miscellaneous) 2018 Q1 Fuel Technology 2018 Q1 Energy Engineering and Power Technology 2018 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Muraza, O. Nakaoka, S. Jamil, A. K. (orcid)0000-0002-5229-2717 Mayoral, A. (orcid)0000-0002-6873-5244 Sebastian, V. Universidad de Zaragoza Yamani, Z. H. Masuda, T. 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 31, 12 (2018), 14097-14103 Energy fuels Energy and Fuels 0887-0624 4391910 http://zaguan.unizar.es/record/75606/files/texto_completo.pdf Postprint 133528 http://zaguan.unizar.es/record/75606/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:75606 articulos driver 2019-11-22-14:45:07 ARTICLE