废弃汽车轮胎经化学处理的热解炭黑的电化学性能

IF 8 Q1 ENERGY & FUELS Energy nexus Pub Date : 2024-04-16 DOI:10.1016/j.nexus.2024.100297
Desmond Ankobiah Kusi, Emmanuel Kwesi Arthur, Emmanuel Gikunoo, Perseverance Dzikunu, Kwabena Koranteng Asiedu, Richard Armoo, Frank Ofori Agyemang
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引用次数: 0

摘要

热解炭黑(CBp)是轮胎热解过程中产生的一种固体副产品,其中含有轮胎添加剂产生的各种污染物。这些污染物限制了 CBp 作为碳源在超级电容器等储能应用中的使用。本研究旨在通过采用不同的化学处理和活化方法,改善 CBp 的物理化学、形态和电化学特性。化学处理包括酸(盐酸)、碱(NaOH)、酸碱(盐酸/NaOH)和脱硫(二甲苯中的 NaOH)过程,以去除硫、锌和硅等杂质。处理后的 CBp 样品再通过 KOH 浸渍技术进行活化,以增加其表面积和孔隙率。使用扫描电子显微镜(SEM)、能量色散光谱(EDX)、X 射线衍射(XRD)和布鲁纳-艾美特-泰勒(BET)对处理过的 CBp 样品进行表征。使用电静态充放电 (GCD)、循环伏安 (CV) 和电化学阻抗光谱 (EIS) 评估了经过处理的 CBp 样品的电化学性能。结果表明,化学处理大大降低了杂质含量,提高了 CBp 的电化学性能。 在经过处理的 CBp 样品中,脱硫 CBp 样品的比电容最高,达到 218 F/g。这项研究的结果表明,通过采用适当的化学处理和活化方法,可以有效地将 CBp 用作超级电容器电极的潜在碳源。这将创造一种循环经济,实现 CBp 的价值。
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Electrochemical performance of chemically treated pyrolytic carbon black from waste car tyres

Pyrolytic carbon black (CBp) is a solid by-product of tyre pyrolysis that contains various contaminants from the tyre additives. These contaminants limit the use of CBp as a carbon source for energy storage applications such as supercapacitors. This study aims to improve the physicochemical, morphological, and electrochemical properties of CBp by applying different chemical treatments and activation methods. The chemical treatments include acid (HCl), base (NaOH), acid-base (HCl/NaOH), and desulphurization (NaOH in xylene) processes to remove impurities such as sulphur, zinc, and silicon. The treated CBp samples are then activated by KOH impregnation technique to increase the surface area and porosity. The characterizations of the treated CBp samples are performed using Scanning Electron Microscopy (SEM) with Energy Dispersive Spectroscopy (EDX), X-ray Diffraction (XRD), and Brunner Emmett Teller (BET). The electrochemical performance of the treated CBp samples are evaluated using galvanostatic charge-discharge (GCD), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The results show that the chemical treatments significantly reduce the impurity levels and enhance the electrochemical performance of CBp. The desulphurized CBp sample exhibits the highest specific capacitance of 218 F/g among the treated CBp samples. The findings of this study suggest that CBp can be effectively utilized as a potential carbon source for supercapacitor electrodes by applying suitable chemical treatments and activation methods. This will create a circular economy to valorize CBp.

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来源期刊
Energy nexus
Energy nexus Energy (General), Ecological Modelling, Renewable Energy, Sustainability and the Environment, Water Science and Technology, Agricultural and Biological Sciences (General)
CiteScore
7.70
自引率
0.00%
发文量
0
审稿时长
109 days
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