Effect of Preparation Method on Catalytic Performance of Ag/OMS-2 for the Oxidation of Ethyl Acetate and Formaldehyde
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ORIGINAL ARTICLE
Effect of Preparation Method on Catalytic Performance of Ag/OMS‑2 for the Oxidation of Ethyl Acetate and Formaldehyde Ning Dong1 · Jiaoli Fu1,2 · Qing Ye1 · Mengyue Chen1 · Zhidan Fu1 · Hongxing Dai3 Received: 2 May 2020 / Accepted: 30 July 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract The octahedral molecular sieve (OMS-2)-supported Ag samples were prepared by the pre-incorporation, ion exchange, and polyvinyl alcohol (PVA)-protecting methods, respectively. The XRD, TEM, BET, H2-TPR, O2-TPD, and FT-IR techniques were used to investigate effects of the preparation method on physicochemical property of the samples, over which oxidation of ethyl acetate and formaldehyde was used as probe reactions. It is found that catalytic activity was dependent on physicochemical property of the sample, and decreased in the order of Ag/OMS-2-PI > Ag/OMS-2-IE > Ag/OMS-2-PVA > OMS-2. The Ag/OMS-2-PI sample performed the best: the T90 for ethyl acetate and formaldehyde oxidation was 200 and 170 °C, respectively. The Ag species in Ag/OMS-2-PI were uniformly distributed in the pores and channels of the OMS-2 support. The characterization results indicate that the outstanding catalytic activity of Ag/OMS-2-PI was due to its high surface Mn3+ and adsorbed oxygen species concentrations, good low-temperature reducibility, and the largest surface area. Keywords Cryptomelane-type manganese oxide octahedral molecular sieve · Supported silver catalyst · Volatile organic compound · Ethyl acetate oxidation · Formaldehyde oxidation
1 Introduction The quality of the atmosphere environment exerts an important impact on human survival and development. Up to now, industrial production has utilized a large amount of natural resources, resulting in excessive emissions of many * Qing Ye [email protected] * Hongxing Dai [email protected] 1
Key Laboratory of Beijing On Regional Air Pollution Control, Department of Environmental Science, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
2
MCC Capital Engineering & Research Incorporation Ltd, Beijing 100176, China
3
Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing On Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, and Laboratory of Catalysis Chemistry and Nanoscience, Department of Chemistry and Chemical Engineering, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China
pollutants. Most of volatile organic compounds (VOCs) not only pollute the ecological environment but also seriously threaten human health, hence emissions of VOCs are strictly controlled. The common emission sources from daily life include building and decoration materials, kitchen fumes, and vehicle exhausts, whereas the main industrial emission sources are the waste gases from chemical, petrochemical, cleaning, printing, and power generation industries [1, 2]. In
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