Investigation of the enhancing effects of sulfur and/or oxygen functional groups of nanoporous carbons on adsorption of dibenzothiophenes
Investigation of the enhancing effects of sulfur and/or oxygen functional groups of nanoporous carbons on adsorption of dibenzothiophenes
复制标题
DOI：
10.1016/j.carbon.2010.11.038
复制
发表时间：
2011-04
期刊：
影响因子：
10.9
通讯作者：
M. Seredych;T. Bandosz
中科院分区：
文献类型：
--
作者：
M. Seredych;T. Bandosz
研究了含不同含氧量和硫磺的聚合物衍生碳对总硫浓度为20ppmw的模拟柴油中二苯并噻吩苯(DBT)和4，6-二甲基二苯并噻吩苯(DMDBT)的吸附性能。用氮气吸附、热分析、电位滴定、XPS、质谱学和元素分析等手段对初始碳和排出碳进行了表征。以萘为参照物，计算了DBT和DMDBT的吸附选择性。结果表明，杂原子的含量和排列对脱除模型柴油中DBT和DMDBT的能力和选择性均有影响。虽然含氧和含硫基团都提高了碳的容量，但表面化学的增强作用对含硫碳的增强效果更为明显。这与硫磺-硫磺相互作用有关。
Adsorption of dibenzothiophene (DBT) and 4,6-dimethyldibenzothiophene (DMDBT) from simulated diesel fuel with 20ppmw total concentration of sulfur was investigated on polymer-derived carbon containing various amounts of oxygen and sulfur incorporated to the surface. Initial and exhausted carbons were characterized using adsorption of nitrogen, thermal analysis, potentiometric titration, XPS, mass spectroscopy and elemental analysis. Selectivities for DBT and DMDBT adsorption were calculated with reference to naphthalene. It was found that both the capacity and selectivity for DBT and DMDBT removal from model diesel fuel were affected by the content and arrangement of heteroatoms. Although both oxygen and sulfur containing groups enhance the capacity, the enhancing effects of surface chemistry were more pronounced on the carbon with sulfur incorporated to its matrix. This is linked to sulfur–sulfur interactions.