The present study concentrates on the preparation of activated carbon (AC) from a low‐cost precursor, namely, polyethylene terephthalate waste, as a potential alternative adsorbent to commercially activated carbon for desulfurization of model gasoline at ambient temperature. Polyethylene terephthalate was carbonized at 450°C, and the produced char was steam activated at 750°C for 90 min to prepare the AC. The morphology, crystallinity, and surface functional groups of as‐synthesized adsorbent were examined by scanning electron microscopy, X‐ray diffraction, and Fourier transform infrared spectroscopy, respectively. The so‐synthesized AC was employed in the adsorptive desulfurization of dibenzothiophene (DBT) from model gasoline. The effect of the initial concentration of DBT, AC dose, temperature, and contact time on the removal efficiency of DBT was investigated. The maximum desulfurization level (97.10%) was performed at 40°C using 0.30 g of the AC for 60 min. The Langmuir model best demonstrated the adsorption results with an adsorption capacity of 49.56 mg/g. The pseudo‐second‐order model best described the adsorption kinetics of DBT by the so‐synthesized AC. The obtained consequences exhibited that AC with high desulfurization capability could be synthesized from polyethylene terephthalate waste.

中文翻译：

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聚对苯二甲酸乙二醇酯废物衍生的活性炭用于模型汽油中二苯并噻吩的吸附脱硫：动力学和等温线评估

本研究的重点是从低成本的前体即聚对苯二甲酸乙二酯废料制备活性炭（AC），作为在室温下对模型汽油进行脱硫的商业活性炭的潜在替代吸附剂。将聚对苯二甲酸乙二醇酯在450°C下碳化，并将生成的炭在750°C蒸汽活化90分钟，以制备AC。分别通过扫描电子显微镜，X射线衍射和傅里叶变换红外光谱法检查了合成吸附剂的形貌，结晶度和表面官能团。如此合成的AC用于模型汽油中二苯并噻吩（DBT）的吸附脱硫。DBT初始浓度，AC剂量，温度，考察了接触时间对DBT去除效率的影响。在40°C下使用0.30 g的AC进行60分钟的最大脱硫水平（97.10％）。Langmuir模型最能证明其吸附效果，吸附量为49.56 mg / g。拟二级模型最恰当地描述了合成AC对DBT的吸附动力学。得到的结果表明，可以从聚对苯二甲酸乙二醇酯废物中合成具有高脱硫能力的AC。