Catalytic Enhancement of n-Heptane Cracking over Fe Modified Plate-Like ZSM-5 Zeolite for Propylene Production

IF 2.3 4区 化学 Q3 CHEMISTRY, PHYSICAL
Weijiong Dai, Linquan Li, Zongqiang Liu, Jing Zhao, Yan Wang, Jiajun Zheng, Ruifeng Li
{"title":"Catalytic Enhancement of n-Heptane Cracking over Fe Modified Plate-Like ZSM-5 Zeolite for Propylene Production","authors":"Weijiong Dai,&nbsp;Linquan Li,&nbsp;Zongqiang Liu,&nbsp;Jing Zhao,&nbsp;Yan Wang,&nbsp;Jiajun Zheng,&nbsp;Ruifeng Li","doi":"10.1007/s10562-025-05125-2","DOIUrl":null,"url":null,"abstract":"<div><p>In the catalytic cracking of naphtha to olefins, the catalytic performance of ZSM-5 zeolite catalyst is affected by both the diffusion property and acidity of zeolite catalyst, and it is of great significance to enhance the catalytic performance of zeolite by adjusting the two factors reasonably. In this work, Fe was in situ introduced into the synthesis system by ammonium fluoride-assisted route, and plate-like ZSM-5 zeolites with different Fe contents were effectively prepared. The dimension along the <i>b</i>-axis of the plate-like zeolite crystal was tuned around at 100 nm. The XRD and UV-vis analysis demonstrate the effective incorporation of Fe species into ZSM-5 framework. The acidity characterization indicates that the Fe species can effectively reduce zeolite acid strength. Catalytic cracking of n-heptane was chosen to investigate the catalytic properties of the plate-like zeolites. The plate-like ZSM-5 zeolite can effectively improve propylene selectivity and catalytic stability in comparison with the sample C-Z. Meanwhile, by introducing a small amount of Fe, the contribution of monomolecular reaction can be enhanced and the hydrogen transfer reaction can thus be suppressed, leading to higher propylene yield and improved catalytic stability.</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 8","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2025-07-28","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/s10562-025-05125-2","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

In the catalytic cracking of naphtha to olefins, the catalytic performance of ZSM-5 zeolite catalyst is affected by both the diffusion property and acidity of zeolite catalyst, and it is of great significance to enhance the catalytic performance of zeolite by adjusting the two factors reasonably. In this work, Fe was in situ introduced into the synthesis system by ammonium fluoride-assisted route, and plate-like ZSM-5 zeolites with different Fe contents were effectively prepared. The dimension along the b-axis of the plate-like zeolite crystal was tuned around at 100 nm. The XRD and UV-vis analysis demonstrate the effective incorporation of Fe species into ZSM-5 framework. The acidity characterization indicates that the Fe species can effectively reduce zeolite acid strength. Catalytic cracking of n-heptane was chosen to investigate the catalytic properties of the plate-like zeolites. The plate-like ZSM-5 zeolite can effectively improve propylene selectivity and catalytic stability in comparison with the sample C-Z. Meanwhile, by introducing a small amount of Fe, the contribution of monomolecular reaction can be enhanced and the hydrogen transfer reaction can thus be suppressed, leading to higher propylene yield and improved catalytic stability.

Graphical Abstract

铁改性片状ZSM-5沸石催化正庚烷裂化生产丙烯
在石脑油催化裂化制烯烃过程中,ZSM-5型沸石催化剂的催化性能受到沸石催化剂的扩散性能和酸度的双重影响,合理调节这两个因素对提高沸石的催化性能具有重要意义。本研究通过氟化铵辅助途径将Fe原位引入合成体系,有效制备了不同Fe含量的片状ZSM-5分子筛。板状沸石晶体沿b轴的尺寸在100 nm左右调整。XRD和UV-vis分析表明,ZSM-5骨架有效地结合了Fe。酸度表征表明,铁能有效降低沸石的酸强度。以正庚烷催化裂化为研究对象,考察了板状沸石的催化性能。与样品C-Z相比,片状ZSM-5分子筛能有效提高丙烯的选择性和催化稳定性。同时,通过引入少量Fe,可以增强单分子反应的贡献,抑制氢转移反应,从而提高丙烯收率,改善催化稳定性。图形抽象
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 求助全文
来源期刊
Catalysis Letters
Catalysis Letters 化学-物理化学
CiteScore
5.70
自引率
3.60%
发文量
327
审稿时长
1 months
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.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信