Surface modification of Fe/MCSAC catalysts with coaxial cylinder dielectric barrier discharge plasma for low-temperature catalytic hydrolysis of CS2
Surface modification of Fe/MCSAC catalysts with coaxial cylinder dielectric barrier discharge plasma for low-temperature catalytic hydrolysis of CS2
复制标题
同轴圆柱介质阻挡放电等离子体表面修饰 Fe/MCSAC 催化剂用于 CS2 低温催化水解
DOI：
10.1016/j.apcata.2016.09.007
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发表时间：
2016-10-25
影响因子：
5.5
通讯作者：
Ning, Ping
中科院分区：
文献类型：
--
作者：
Li, Kai;Liu, Gui;Ning, Ping
研究了介质阻挡放电（DBD）低温等离子体（NTP）改性微波椰壳活性炭（MCSAC）负载Fe（Fe/MCSAC）脱除烟气中CS2的性能。考察了反应器结构、改性气氛、输入电压、处理时间和放电间隔等条件对NTP改性Fe/MCSAC催化剂性能的影响。结果表明，经NTP改性的Fe/MCSAC催化剂对CS2具有较好的催化水解活性，最佳反应器类型、改性气氛、输入电压和处理时间分别为：同轴圆筒、NH3气氛、20 V、10 min和2 mm。采用CO程序升温脱附（CO-TPD）、X射线光电子能谱（XPS）、BET、理论计算和傅里叶变换红外光谱（FT-IR）等分析方法，研究了等离子体处理对CS2水解的影响及CS2的水解机理。NTP改性后活性组分的分散性得到改善，含氧基团和含钾基团的数量增加，可有效提高催化剂的活性。研究表明，NTP处理是一种有效的方法来操纵催化剂的表面性质的CS2催化水解反应。(C)© 2016 Elsevier B. V.版权所有。
The removal performances of carbon disulphide (CS2) from gas streams over microwave coconut shell activated carbon (MCSAC) supported Fe (Fe/MCSAC) modified by a dielectric barrier discharge (DBD) non-thermal plasma (NTP) were investigated. The properties of Fe/MCSAC catalysts modified by NTP in different conditions, including the reactor structures, modification atmospheres, input voltages, treatment times and discharge intervals, were also studied. A study of the catalytic activities showed that Fe/MCSAC catalysts with NTP modification better catalytically hydrolyse CS2, and the optimal reactor type, modification atmosphere, input voltage and treatment time were a coaxial cylinder, an NH3 atmosphere, 20 V,10 min and 2 mm, respectively. Temperature programmed desorption of CO (CO-TPD), X-ray photoelectron spectroscopy (XPS), Brunauer Emmett Teller (BET), theoretical calculation and Fourier transform infrared spectrum (FT-IR) analysis methods, which were designed to understand the effect of the plasma treatment and the hydrolysis mechanism of CS2. The catalytic activity could be enhanced effectively by improving the dispersion of the active components and increasing the number of oxygen containing groups and potassium-containing groups after NTP modification. The investigation indicated that NTP treatment is an effective way to manipulate the catalyst surface properties for the CS2 catalytic hydrolysis reaction. (C) 2016 Elsevier B.V. All rights reserved.