131122 20260217205452.0 doi 10.1021/acs.iecr.3c03956 sideral 136718 ART-2024-136718 eng Zapater, Diego Effect of Thermal, Acid, and Alkaline Treatments over SAPO-34 and Its Agglomerated Catalysts: Property Modification and Methanol-to-Olefin Reaction Performance 2024 Access copy available to the general public Unrestricted SAPO-34 zeolite is one of the most well-studied methanol-to-olefin catalysts, with applications from laboratory to commercial scale. Here, we have studied the impact on the properties and performance of different modifications of a commercial zeolite, including thermal, acid, and alkaline treatments, along with its agglomeration with bentonite and alumina required in the technical catalyst. We prepared three zeolites and agglomerated them, making a total of seven materials, along with our benchmark catalyst. These were characterized and tested in a packed bed reactor. We analyzed the conversion, yield, and deactivation (coke) based on the effective acid site density ρAS* (a parameter correlating acid strength, density, and micropore volume). Thermal treatment increased the effective acid site density of the commercial zeolite by 60%, while only a 10% increase was found in the parent agglomerated catalyst. Acid etching increased the effective acid site density by 80%, while the basic treatment completely amorphized the framework of the zeolite. After agglomeration, the performance of the catalysts (by means of olefin production and deactivation) correlated with effective acid site density. The catalysts based on thermally and acid-treated zeolites performed best, while they had the lowest effective acid site density. info:eu-repo/grantAgreement/ES/MICINN/BES-2017-082052 info:eu-repo/grantAgreement/ES/MICINN/CTQ2016-76533-R info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es 3.9 2024 ENGINEERING, CHEMICAL 65 / 176 = 0.369 2024 Q2 T2 0.828 2024 Chemical Engineering (miscellaneous) 2024 Q1 Industrial and Manufacturing Engineering 2024 Q1 Chemistry (miscellaneous) 2024 Q1 6.7 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Lasobras, Javier Universidad de Zaragoza (orcid)0000-0002-7488-6196 Zambrano, Naydu Hita, Idoia Castaño, Pedro Soler, Jaime Herguido, Javier Universidad de Zaragoza (orcid)0000-0003-1940-9597 Menéndez, Miguel Universidad de Zaragoza (orcid)0000-0002-2494-102X 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 63, 8 (2024), 3586–3599 Ind. eng. chem. res. Industrial and Engineering Chemistry Research 0888-5885 3494786 http://zaguan.unizar.es/record/131122/files/texto_completo.pdf Versión publicada 3038121 http://zaguan.unizar.es/record/131122/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:131122 articulos driver 2026-02-17-20:19:18 ARTICLE