{"title":"Efficient Chromia-Alumina Catalysts with Hierarchical Porous Structure for Isobutane Dehydrogenation in Fixed-Bed Reactor","authors":"A. I. Zolotukhina, G. V. Mamontov","doi":"10.1007/s10562-025-05126-1","DOIUrl":null,"url":null,"abstract":"<div><p>The granulated chromia-alumina (CrO<sub>x</sub>/Al<sub>2</sub>O<sub>3</sub>) catalysts for dehydrogenation of light paraffinic hydrocarbons in a fixed-bed reactor are prepared from the products of thermochemical activation of Al(OH)<sub>3</sub> through a one-stage wet mixing method. The role of wood flour addition in the formation of the hierarchical porous structure of the catalysts is demonstrated. The high mechanical strength of granules (6.7–10.0 MPa) is achieved despite the presence of macropores in the structure. The role of macropores in the isobutane dehydrogenation under near-real conditions using a bed with the catalyst granules is discussed. The activity rise with the increased addition of wood flour loading and an increase in the amount of macropores are shown. Such data are similar in activity to catalysts used in industry.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 9","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Letters","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1007/s10562-025-05126-1","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The granulated chromia-alumina (CrOx/Al2O3) catalysts for dehydrogenation of light paraffinic hydrocarbons in a fixed-bed reactor are prepared from the products of thermochemical activation of Al(OH)3 through a one-stage wet mixing method. The role of wood flour addition in the formation of the hierarchical porous structure of the catalysts is demonstrated. The high mechanical strength of granules (6.7–10.0 MPa) is achieved despite the presence of macropores in the structure. The role of macropores in the isobutane dehydrogenation under near-real conditions using a bed with the catalyst granules is discussed. The activity rise with the increased addition of wood flour loading and an increase in the amount of macropores are shown. Such data are similar in activity to catalysts used in industry.
期刊介绍：
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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