School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, China.
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002, China.
Ecotoxicol Environ Saf. 2020 Jun 15;196:110555. doi: 10.1016/j.ecoenv.2020.110555. Epub 2020 Apr 2.
A strategy for clean fuel by selective adsorption processing was deemed to be convenient and environmental-friendly in past decades. However, the development of adsorption desulfurization was tremendously subject to the fabrication of high-performance adsorbents with large capacity and high stability. Herein, we designed a novel route to fabricate the cloth-like carbon nanofiber film with a hierarchical porous structure by electrospinning. The structure and properties of the cloth-like carbon nanofiber films were determined by a series of characterizations. Subsequently, the desulfurization performance of the cloth-like carbon nanofiber films was examined by the simulated thiophene (TH) oil. Furthermore, the effect of adsorption conditions on the adsorption capacity was intensively investigated, such as carbonization temperature, initial concentration and desulfurization temperature. The results found that at optimal calcination temperature of 700 °C, the cloth-like carbon nanofiber films possessed the highest micropore volume (V = 0.185 m/g) and adsorption capacity (q = 96.6 mg/g) at 800 mg/L initial concentration under the adsorption temperature of 25 °C. The results corroborated that the physical properties of the cloth-like carbon nanofiber films with the surface area of 417.8 m/g, the total pore volume of 0.187 cm/g and average pore diameter of 1.36 nm had an important influence on the high adsorption capacity. On this basis, the adsorption experimental data were best fitted to pseudo-second-order kinetic and Langmuir isotherm models. Furthermore, the other highlight of the cloth-like carbon nanofiber films was convenient for the separation from oil, thus achieving the desirable reused performance.
在过去几十年中，人们认为通过选择性吸附处理来制备清洁燃料的策略既方便又环保。然而，吸附脱硫的发展极大地受制于制备具有大容量和高稳定性的高性能吸附剂。在此，我们通过静电纺丝设计了一种制造具有分级多孔结构的布状碳纤维薄膜的新途径。通过一系列表征确定了布状碳纤维薄膜的结构和性能。随后，通过模拟噻吩（TH）油考察了布状碳纤维薄膜的脱硫性能。此外，还深入研究了吸附条件对吸附容量的影响，例如碳化温度、初始浓度和脱硫温度。结果发现，在最佳的 700°C 煅烧温度下，布状碳纤维薄膜在 800mg/L 的初始浓度下于 25°C 的吸附温度下具有最高的微孔体积（V=0.185m/g）和吸附容量（q=96.6mg/g）。结果表明，比表面积为 417.8m/g、总孔体积为 0.187cm/g 和平均孔径为 1.36nm 的布状碳纤维薄膜的物理性能对高吸附容量有重要影响。在此基础上，吸附实验数据最好拟合伪二级动力学和 Langmuir 等温模型。此外，布状碳纤维薄膜的另一个亮点是便于从油中分离，从而实现了理想的可重复使用性能。
