Effect of pore structure and oxygen-containing groups on adsorption of dibenzothiophene over activated carbon
Effect of pore structure and oxygen-containing groups on adsorption of dibenzothiophene over activated carbon
复制标题
孔结构和含氧基团对活性炭吸附二苯并噻吩的影响
DOI：
10.1016/j.fuel.2017.03.018
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发表时间：
2017-07-15
期刊：
影响因子：
7.4
通讯作者：
Yang, Yongxing
中科院分区：
文献类型：
--
作者：
Deng, Liangliang;Lu, Boqiong;Yang, Yongxing
采用水蒸气和浓硫酸对活性炭进行化学处理，并将其作为吸附剂用于脱除模拟柴油中的有机硫化合物。采用N2吸附法、碱滴定法和红外光谱法对改性后的活性炭进行了表征。与未处理的活性炭相比，通过在900 ℃下的蒸汽处理使中孔体积从0.248增加到0.856 cm（3）/g，并且对二苯并噻吩的硫吸附容量从10.9增加到20.6 mg/g，并且通过在250 ℃下的浓H2SO 4处理增加了表面酸性的量。含氧基团为0.05 - 1.95 mmol/g，对二苯并噻吩的总吸附容量为10.9 - 33.3 mg/g。二苯并噻吩的总吸附量被发现是成比例的介孔体积和表面含氧基团的量。硫原子与表面含氧基团之间的直接相互作用对有机硫化合物的吸附起着重要作用。(C)2017爱思唯尔有限公司版权所有
Activated carbons chemically treated by steam and concentrated H2SO4, were used as adsorbents for removing organic sulfur compounds from a model diesel. The modified activated carbon was characterized by N-2 sorption, base titration and FTIR spectroscopy. As compared with the untreated activated carbon, the treatment by a steam at 900 degrees C increased the mesoporous volumes from 0.248 to 0.856 cm(3)/g and sulfur adsorption capacity for dibenzothiophene from 10.9 to 20.6 mg/g and the treatment by a concentrated H2SO4 at 250 degrees C increased the amount of surface acidic-oxygenated groups from 0.05 to 1.95 mmol/g, and total adsorption capacity for dibenzothiophene from 10.9 to 33.3 mg/g. The total adsorption capacity for dibenzothiophene is found to be proportional to the mesoporous volume and the amount of surface oxygen-containing groups. It is proposed that direct interaction between the sulfur atom and surface oxygen-containing groups plays an important role in the adsorption of organic sulfur compound. (C) 2017 Elsevier Ltd. All rights reserved.