Application of clinoptilolite as carrier for VOCs removal by cobalt and manganese oxides

IF 5.2 2区化学 Q1 CHEMISTRY, APPLIED

Catalysis Today Pub Date : 2025-06-25 DOI:10.1016/j.cattod.2025.115437

I. Yordanova , S. Todorova , K. Tenchev , E. Encheva , H. Kolev , A. Naydenov

引用次数: 0

Abstract

Bulgarian natural zeolite Clinoptilolite was used for catalyst carrier. To improve carrier properties modification by nitric acid and ion exchange through ammonium nitrate was performed. Catalytic active phase of cobalt and manganese was applied by wet impregnation method. Synthesised Co or Mn catalysts were characterized by means of AES-ICP, XRD, low-temperature N₂ adsorption, TPR, XPS, and HRTEM. The zeolite catalysts were tested in the reaction of total oxidation of n-hexane. All samples demonstrated good catalytic activity. Samples with low amount of the active phase (10 %) manifested a higher catalytic activity. This is due to uniform distribution of the active phase on the carrier surface, diminished crystallite size, and readily reducible Co oxide and Mn oxide phases.

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斜沸石载体在钴、锰氧化物去除VOCs中的应用

采用保加利亚天然沸石斜沸石作为催化剂载体。通过硝酸改性和硝酸铵离子交换来改善载体性能。采用湿浸渍法制备钴锰催化活性相。采用AES-ICP、XRD、低温N2吸附、TPR、XPS、HRTEM等手段对合成的Co或Mn催化剂进行了表征。对沸石催化剂在正己烷全氧化反应中的应用进行了试验。所有样品均表现出良好的催化活性。活性相含量低（10 %）的样品表现出较高的催化活性。这是由于活性相在载体表面均匀分布，晶粒尺寸减小，并且易于还原Co氧化物和Mn氧化物相。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Catalysis Today 化学-工程：化工

CiteScore

11.50

自引率

3.80%

发文量

573

审稿时长

2.9 months

期刊介绍： Catalysis Today focuses on the rapid publication of original invited papers devoted to currently important topics in catalysis and related subjects. The journal only publishes special issues (Proposing a Catalysis Today Special Issue), each of which is supervised by Guest Editors who recruit individual papers and oversee the peer review process. Catalysis Today offers researchers in the field of catalysis in-depth overviews of topical issues. Both fundamental and applied aspects of catalysis are covered. Subjects such as catalysis of immobilized organometallic and biocatalytic systems are welcome. Subjects related to catalysis such as experimental techniques, adsorption, process technology, synthesis, in situ characterization, computational, theoretical modeling, imaging and others are included if there is a clear relationship to catalysis.