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Preparation of high-performance toluene adsorbents by sugarcane bagasse carbonization combined with surface modification

机译：用表面改性制备甘蔗甘蔗渣碳化高效甲苯吸附剂

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摘要

A series of activated carbons were prepared by carbonizing sugarcane bagasse combined with surface modification, which showed an excellent performance of adsorbing toluene (522 mg g ~(?1) at 30 °C). The results demonstrated that the enhancement of the activated temperature was benefit to promote the porosity and specific surface area (BET) of ACs. Thus, AC-800 showed optimal adsorption and its toluene adsorption performance was better than that of most ACs in the literature. Five consecutive adsorption–desorption cycles presented that AC-800's toluene adsorptive capacity was as high as 522 mg g ~(?1) (30 °C), and toluene adsorptive capacity was only decreased by 4.5%. According to the fraction of N-containing functional groups and the binding energy of toluene on N-containing functional groups, pyridinic-N (N-6) was believed to contribute more to toluene adsorption. Moreover, the Bangham model was considered as the best model of describing toluene adsorption on AC-800. Therefore, both surface adsorption and pore diffusion were the two mechanisms of toluene adsorption, and the diffusion of toluene molecules in the pores was considered as the key factor that affected the adsorption rate.
机译：通过碳化甘蔗甘蔗蛋白结合表面改性，制备了一系列活性炭，这表明吸附甲苯的优异性能（522mg g〜（α1）在30℃）。结果表明，活化温度的增强有益于促进ACs的孔隙率和比表面积（BET）。因此，AC-800显示出最佳吸附，其甲苯吸附性能优于文献中大多数AC的性能。呈现的五个连续吸附 - 解吸循环呈现，AC-800的甲苯吸附容量高达522mg g〜（α1）（30℃），甲苯吸附能力仅降低4.5％。根据含N型官能团​​的级分和甲苯的甲苯的结合能量，认为吡啶-N（N-6）促进甲苯吸附更多。此外，Bangham模型被认为是在AC-800上描述甲苯吸附的最佳模型。因此，表面吸附和孔隙扩散都是甲苯吸附的两种机制，并且孔中甲苯分子的扩散被认为是影响吸附速率的关键因素。

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