Physical-Chemical and Catalytic Properties of MEL and MFI Zeolites Obtained by Steam-Assisted Crystallization

IF 1.3 4区工程技术 Q3 CHEMISTRY, ORGANIC Petroleum Chemistry Pub Date : 2024-12-26 DOI:10.1134/S0965544124070077

V. A. Vorobkalo, A. G. Popov, A. V. Efimov, D. O. Bachurina, A. I. Nikiforov, I. I. Ivanova

{"title":"Physical-Chemical and Catalytic Properties of MEL and MFI Zeolites Obtained by Steam-Assisted Crystallization","authors":"V. A. Vorobkalo, A. G. Popov, A. V. Efimov, D. O. Bachurina, A. I. Nikiforov, I. I. Ivanova","doi":"10.1134/S0965544124070077","DOIUrl":null,"url":null,"abstract":"Two series of zeolites, vis., the MEL and MFI types, with different Si/Al molar ratios were synthesized by a steam-assisted crystallization method, specifically dry gel conversion (DGC). Their physicochemical properties were characterized by low-temperature nitrogen adsorption, scanning electron microscopy, and X-ray fluorescence analysis. The acidic properties were examined by IR spectroscopy of adsorbed pyridine and 2,6-di-tert-butylpyridine as well as by ammonia temperature-programmed desorption. The DGC-synthesized zeolites were distinguished by high crystallinity, small crystal size, and well-developed surface. All the samples exhibited high activity and deactivation resistance in the oligomerization of a butane–butylene fraction. A comparative assessment of the catalytic performance the MEL and MFI samples demonstrated that the structural difference between the MEL and MFI types barely affects their deactivation resistance. Therefore, MEL zeolite is a valid alternative to the MFI type in the development of oligomerization catalysts.","PeriodicalId":725,"journal":{"name":"Petroleum Chemistry","volume":"64 9","pages":"1070 - 1078"},"PeriodicalIF":1.3000,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Petroleum Chemistry","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1134/S0965544124070077","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, ORGANIC","Score":null,"Total":0}

引用次数: 0

Abstract

Two series of zeolites, vis., the MEL and MFI types, with different Si/Al molar ratios were synthesized by a steam-assisted crystallization method, specifically dry gel conversion (DGC). Their physicochemical properties were characterized by low-temperature nitrogen adsorption, scanning electron microscopy, and X-ray fluorescence analysis. The acidic properties were examined by IR spectroscopy of adsorbed pyridine and 2,6-di-tert-butylpyridine as well as by ammonia temperature-programmed desorption. The DGC-synthesized zeolites were distinguished by high crystallinity, small crystal size, and well-developed surface. All the samples exhibited high activity and deactivation resistance in the oligomerization of a butane–butylene fraction. A comparative assessment of the catalytic performance the MEL and MFI samples demonstrated that the structural difference between the MEL and MFI types barely affects their deactivation resistance. Therefore, MEL zeolite is a valid alternative to the MFI type in the development of oligomerization catalysts.

Abstract Image

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

蒸汽辅助结晶制备MEL和MFI沸石的理化性质和催化性能

采用蒸汽辅助结晶法合成了不同硅铝摩尔比的MEL型和MFI型两系列沸石，即干凝胶转化（DGC）。通过低温氮吸附、扫描电镜和x射线荧光分析对其理化性质进行了表征。通过吸附吡啶和2,6-二叔丁基吡啶的红外光谱和氨程序升温解吸对其酸性进行了表征。dgc合成的沸石具有结晶度高、晶体尺寸小、表面发育良好等特点。所有样品在丁烷-丁烯组分的低聚反应中都表现出高活性和抗失活性。对MEL和MFI样品的催化性能的比较评估表明，MEL和MFI类型之间的结构差异几乎不影响其抗失活能力。因此，MEL沸石是开发低聚催化剂的有效替代品。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Petroleum Chemistry 工程技术-工程：化工

CiteScore

2.50

自引率

21.40%

发文量

102

审稿时长

6-12 weeks

期刊介绍： Petroleum Chemistry (Neftekhimiya), founded in 1961, offers original papers on and reviews of theoretical and experimental studies concerned with current problems of petroleum chemistry and processing such as chemical composition of crude oils and natural gas liquids; petroleum refining (cracking, hydrocracking, and catalytic reforming); catalysts for petrochemical processes (hydrogenation, isomerization, oxidation, hydroformylation, etc.); activation and catalytic transformation of hydrocarbons and other components of petroleum, natural gas, and other complex organic mixtures; new petrochemicals including lubricants and additives; environmental problems; and information on scientific meetings relevant to these areas. Petroleum Chemistry publishes articles on these topics from members of the scientific community of the former Soviet Union.