Adsorptive desulfurization by activated alumina.
Adsorptive desulfurization by activated alumina.
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DOI：
10.1016/j.jhazmat.2009.05.088
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发表时间：
2009-10
影响因子：
13.6
通讯作者：
Ankur Srivastav;V. Srivastava
中科院分区：
文献类型：
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作者：
Ankur Srivastav;V. Srivastava
本研究报告使用商业级活性氧化铝（氧化铝）作为吸附剂，用于从模型油（二苯并噻吩（DBT）溶解在正己烷中）中脱除硫。氧化铝的体积密度为1177.77kg/m3。在最佳条件下，负载DBT后，氧化铝的BET比表面积从143.6 m2/g下降到66.4 m2/g。氧化铝表面的碳氧官能团被发现是有效的DBT到氧化铝上的吸附。吸附剂的最佳投加量为20 g/l。DBT在Al_2O_3上的吸附是一个渐进的过程，24 h达到准平衡。Langmuir等温线最能代表平衡吸附数据。DBT在Al_2O_3上的吸附热和吸附熵变分别为19.5kJ/mol和139.2kJ/molK。
This study reports usage of commercial grade activated alumina (aluminum oxide) as adsorbent for the removal of sulfur from model oil (dibenthiophene (DBT) dissolved in n-hexane). Bulk density of alumina was found to be 1177.77kg/m3. The BET surface area of alumina was found to decrease from 143.6 to 66.4m2/g after the loading of DBT at optimum conditions. The carbon-oxygen functional groups present on the surface of alumina were found to be effective in the adsorption of DBT onto alumina. Optimum adsorbent dose was found to be 20g/l. The adsorption of DBT on alumina was found to be gradual process, and quasi-equilibrium reached in 24h. Langmuir isotherm best represented the equilibrium adsorption data. The heat of adsorption and change in entropy for DBT adsorption onto alumina was found to be 19.5kJ/mol and 139.2kJ/molK, respectively.