多孔炭材料表面的等离子体改性及其吸附燃油中有机噻吩硫

项目名称： 多孔炭材料表面的等离子体改性及其吸附燃油中有机噻吩硫

项目编号： No.20806026

项目类型： 青年科学基金项目

立项/批准年度： 2009

项目学科： 化学工业

项目作者： 余谟鑫

作者单位： 安徽工业大学

项目金额： 18万元

中文摘要： 本项目主要研究活性炭表面负载金属离子、氧化及等离子体等改性对其吸附燃油中噻吩类有机硫的影响；研究活性炭孔结构和表面化学性质与吸附性能之间的关系；研究活性炭对实际燃油中有机硫的吸附和催化氧化脱除性能。主要取得的进展为：（1）测定了二苯并噻吩在三种不同活性炭上的吸附等温线，讨论了活性炭孔结构和表面化学性质与吸附性能之间的关系；（2）采用负载不同金属离子改性活性炭并用于吸附二苯并噻吩，结果表明：活性炭表面负载软酸和交界酸金属离子能提高其对有机硫的吸附；并用TPD技术揭示了不同金属离子负载对二苯并噻吩脱附活化能的影响。(3)采用表面热氧化和等离子改性能有效的提高活性炭表面酸性含氧基团，进而能提高其对燃油中有机硫的吸附性能；（4）采用活性炭催化过氧化氢能有效氧化脱附其表面吸附的二苯并噻吩，使吸附饱和的活性炭得到再生；(5)活性炭对实际燃油中有机硫的吸附及催化氧化实验表明：活性炭对燃油中的有机硫吸附和催化氧化都具有选择性，其对大分子的有机硫如DBT及其衍生物的吸附及催化氧化的选择性要明显高于分子量较小的噻吩及其衍生物，有机硫中的电子密度的差异导致了选择性的不同。

中文关键词： 有机硫；活性炭；改性；吸附；等离子体

英文摘要： The project is mainly concerned with the effect of modification of activated carbon surfaces by loading different metal ions、thermal oxidation and plasma on the adsorption of thiophenic sulfur in fuel, the relationship between the textural structure and surface group of activated carbons and the adsorption ability of organic sulfur, and the removal capacity of thiophenic sulfur of real fuel using adsorption and catalytic oxidation method with acitvated carbon. Main research findings are as follows: (1) Static equilibrium adsorption experiments were conducted to determine the isotherms of DBT on three activated carbons.the effects of structure and surface chemistry properties of activated carbons on adsorption of DBT were discussed.（2）Activated carbons were modified by loading five different metal ions were used to adsorb DBT, results show that the adsorption capacity of organic sulfur can be enhanced by loading soft acid and borderline acid ions；the effect of activated carbon with loading different metal ions on the activation energy for desorption of DBT were indicated by TPD technology.(3) The adsorption capacity of organic sulfur on acitvated carbon surfaces can be increased due to the increase of acid oxygen-containing groups which can be added by thermal oxidation and plasma.(4) The organic sulfur can be removed from its surface with hydrogen peroxide catalyzed by activated carbon；the activated carbon can be regenerated by this method effectively；（5）The experiment of organic sulfur removal from the real oil by adsorption and catalytic oxidation method showed that the removal selectivity of organic sulfur with acitvated carbon is different. The order of adsorption and oxidation selectivity is DBT alkylated derivatives > DBT > BT alkylated derivatives> BT >T due to the difference between electron density on sulfur atom of organic sulfur.

英文关键词： organic sulfur; activated carbons; modification; adsorption; plasma