ABSTRACT

In this study, activated carbons (ACs) were produced from coal using potassium hydroxide as a chemical-activating agent. The preparation procedure composed of KOH impregnation followed by activation at 700°C–900°C under the nitrogen atmosphere for the time duration of 1 h. The effects of various activation temperatures and various KOH to coal ratios on the porous structure of the products were examined. The resulted ACs were also characterized by various techniques such as Brunauer-Emmett-Teller (BET) analysis, Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and X-ray diffraction (XRD) to confirm their characteristic properties. The surface area and pore volume of the resulted ACs increased with increasing temperature. The activated sample obtained from KOH to coal ratio of 2:1 and at heat treatment of 900°C under N₂ environment for 1 h found in the maximum BET specific surface area of about 1598.4 m²/g.

摘要

在这项研究中，使用氢氧化钾作为化学活化剂从煤中生产活性炭 (AC)。制备过程包括 KOH 浸渍，然后在氮气气氛下在 700°C-900°C 下活化 1 小时。考察了各种活化温度和各种 KOH 与煤的比例对产品多孔结构的影响。所得 AC 还通过各种技术进行表征，例如 Brunauer-Emmett-Teller (BET) 分析、傅里叶变换红外光谱 (FTIR)、扫描电子显微镜 (SEM)、热重分析 (TGA) 和 X 射线衍射 (XRD)来确认它们的特性。所得活性炭的表面积和孔体积随着温度的升高而增加。从 KOH 与煤的比例为 2 获得的活化样品：₂环境下1 h发现​​最大BET比表面积约为1598.4 m ² /g。