Metal-loaded polystyrene-based activated carbons as dibenzothiophene removal media via reactive adsorption
Metal-loaded polystyrene-based activated carbons as dibenzothiophene removal media via reactive adsorption
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DOI：
10.1016/j.carbon.2006.05.016
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发表时间：
2006-10
期刊：
影响因子：
10.9
通讯作者：
C. Ania;T. Bandosz
中科院分区：
文献类型：
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作者：
C. Ania;T. Bandosz
为了提高活性炭的脱硫能力，制备了一种新型金属负载的碳基吸附剂，该吸附剂含有高度分散在碳基体中的钠、钴、铜和银，并在室温下进行了二苯并噻吩（DBT）吸附试验。金属的含量可以通过选择性洗涤来控制。新型吸附剂对DBT具有良好的吸附性能和选择性。结合到表面的金属不仅作为含硫芳香族化合物的选择性吸附的活性位点，而且作为碳材料的结构稳定剂，以及作为反应性吸附中的催化剂引发剂。根据所用金属的反应性，活性炭的吸附能力显著变化。钴和铜负载的碳表现出最高的吸收，由于没有很好地定义的催化协同效应。此外，由于前体的磺酸基部分，碳结构中存在硫化合物，导致硫-硫特异性相互作用，从而提高DBT去除的吸附能力。
To improve the desulfurization capability of activated carbons, new metal-loaded carbon-based sorbents containing sodium, cobalt, copper, and silver highly dispersed within the carbon matrix were prepared and tested at room temperature for dibenzothiophene (DBT) adsorption. The content of metals can be controlled by selective washing. The new adsorbents showed good adsorption capacities and selectivity towards DBT. The metals incorporated to the surface act not only as active sites for selective adsorption of sulfur-containing aromatic compounds, but also as structural stabilizers of the carbon materials, and as catalyst initiators in reactive adsorption. Depending on the reactivity of the metal used, the adsorption capacity of the activated carbons significantly varied. Cobalt and copper loaded carbons showed the highest uptakes, due to not-well defined catalytic synergetic effects. Besides, the presence of sulfur compounds in the structure of the carbon as a result of the sulfonic moiety of the precursor, results in sulfur–sulfur specific interactions leading to an enhancement in the adsorption capacity for DBT removal.