Comparison of oil palm shell-based activated carbons produced by microwave and conventional heating methods using zinc chloride activation
Comparison of oil palm shell-based activated carbons produced by microwave and conventional heating methods using zinc chloride activation
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DOI：
10.1016/j.jaap.2013.08.006
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发表时间：
2013-11-01
影响因子：
6
通讯作者：
Sahu, J. N.
中科院分区：
文献类型：
--
作者：
Hesas, Roozbeh Hoseinzadeh;Arami-Niya, Arash;Sahu, J. N.
以油棕榈壳为原料，以氯化锌为活化剂，采用微波辐射和常规加热两种方法制备了活性碳。研究并比较了氯化锌与棕榈壳的重量比对两种加热处理制备的活性炭的质构和表面化学性能的影响。采用氮气吸附、元素分析、物相分析等手段对其织构性质进行了表征，并用扫描电子显微镜(SEM)和傅立叶变换红外光谱(FT-IR)对其表面化学性质进行了研究。对于微波和常规方法制备的样品，BET比表面积在浸渍比为0.65(锌/棕榈壳)时达到最大，然后随着化学比的进一步增加而减小。随着氯化锌含量的增加，微波样品的总孔体积不断增大，而常规样品的总孔体积先增大到浸渍比为0.65，然后减小。结果表明，在浸渍比大于0.65的情况下，微波法的中孔生成率高于常规方法。傅立叶变换红外光谱表明，微波样品中棕榈壳的C-H伸展完全消失，而常规样品由于不同的加热方式，棕榈壳的C-H伸缩程度有所降低。(C)2013爱思唯尔B.V.保留所有权利。
Oil palm shell was used to prepare activated carbons by microwave irradiation and conventional heating methods using zinc chloride as the activation agent. The effects of the weight ratio of zinc chloride to palm shell on the textual and surface chemical properties of prepared activated carbon by both heating treatments were studied and compared in this study. The textual properties were investigated using nitrogen adsorption, ultimate and proximate analysis, and scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FT-IR) was used to study the surface chemical properties. For both the microwave and conventionally prepared samples, the BET surface area was enhanced to a maximum at an impregnation ratio of 0.65 (Zn/palm shell) and then decreased with further increases in the chemical ratio. The total pore volume in the microwave samples increased continuously with increasing zinc chloride, while in the conventional samples, the total pore volume increased up to impregnation ratio of 0.65 and then decreased. The results showed that at the impregnation ratios of higher than 0.65, the rate of mesopore creation in microwave method is higher than that of conventional methods. FTIR spectra demonstrated that the C H stretching of the palm shell disappeared completely in the microwave samples, where it was only reduced in the case of the conventional samples as a result of the different types of heating. (C) 2013 Elsevier B.V. All rights reserved.