{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,10]],"date-time":"2026-01-10T22:00:53Z","timestamp":1768082453560,"version":"3.49.0"},"reference-count":25,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2025,3,20]],"date-time":"2025-03-20T00:00:00Z","timestamp":1742428800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Spanish Ministry of Science and Innovation (MCIN\/AEI\/10.13039\/501100011033)","award":["PID2023-146935OB-C21"],"award-info":[{"award-number":["PID2023-146935OB-C21"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Materials"],"abstract":"<jats:p>The dehydration of methanol to produce light olefins and gasoline, known as MTO (methanol-to-olefins) process requires acidic catalysts that maintain their acidity at reaction temperatures. Zeolites, such as SAPOs and ZSM-5, are commonly used for this purpose due to their acidic centers. The initial step in these experiments involves the activation or pretreatment of these solids to remove physically adsorbed water from their pores. Inadequate pretreatment can lead to the destruction of the existing Br\u00f6nsted sites through the dihydroxylation of surface -OH groups. Therefore, it is crucial to pretreat the zeolites properly to preserve the Br\u00f6nsted sites. One method is to subject the fresh catalyst to programmed dehydration, which involves desorption at a controlled temperature while monitoring the appearance of water that results from Br\u00f6nsted site dihydroxylation. The temperature at which the dehydration peak appears determines the optimal reaction temperature. The results presented in this work will demonstrate the progressive deactivation of the catalysts when the reaction temperature exceeds 400 \u00b0C.<\/jats:p>","DOI":"10.3390\/ma18061370","type":"journal-article","created":{"date-parts":[[2025,3,20]],"date-time":"2025-03-20T05:03:59Z","timestamp":1742447039000},"page":"1370","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["How the Pretreatment Temperature of Zeolitic Catalysts Can Affect the Reaction Temperature of Methanol to Olefins and Gasoline Processes"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9783-8536","authenticated-orcid":false,"given":"Sim\u00f3n","family":"Yunes","sequence":"first","affiliation":[{"name":"Micromeritics Instrument Corporation, 4356 Communications Drive, Norcross, GA 30093, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Abel","family":"Gaspar Rosas","sequence":"additional","affiliation":[{"name":"Micromeritics Instrument Corporation, 4356 Communications Drive, Norcross, GA 30093, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9323-5981","authenticated-orcid":false,"given":"Antonio","family":"Gil","sequence":"additional","affiliation":[{"name":"INAMAT^2-Departamento de Ciencias, Universidad P\u00fablica de Navarra, 31006 Pamplona, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,3,20]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"249","DOI":"10.1016\/0021-9517(77)90172-5","article-title":"The conversion of methanol and other O-compounds to hydrocarbons over zeolite catalysts","volume":"47","author":"Chang","year":"1977","journal-title":"J. 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