含铜氧化铝对煤油中硫醇的吸附特性  

ADSORPTION OF MERCAPTAN IN KEROSENE ON COPPER-CONTAINING ALUMINA

作　　者：杜建云[1] 庄源益[2] 谷文新[2] 

机构地区：[1]天津师范大学化学与生命科学学院,天津300074 [2]南开大学环境科学与工程学院,天津300071

出　　处：《南开大学学报（自然科学版）》2003年第3期26-31,共6页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：天津市高等学校科技发展基金资助项目(01-20501)

摘　　要：利用油乳法制备了含铜氧化铝吸附剂.经筛选,获得一种含铜氧化铝,当煤油中硫醇起始浓度为456.9mg/L时,它对煤油中硫醇的吸附容量达到226mg/g.含铜氧化铝对煤油中硫醇的吸附动力学遵循准二级反应动力学模型,也可用Lagergren一级吸附速率方程描述.二级反应速率常数k2的数值范围为3.86×10-5～43.64×10-5g·mg-1·min-1,并随硫醇起始浓度的增加而减少.一级吸附速率常数k1的数值为6.00×10-3～14.28×10-3min-1,并随硫醇起始浓度增加而增加.由二级速率方程计算出的吸附平衡吸附量qec与实验确定的平衡吸附量qee之间的误差在7％以内.吸附等温线既遵从Langmuir方程,也可用Freundlich方程拟合.由Langmuir方程计算的单层最大吸附量q0为222.2mg/g.Prepared adsorbents, copper-containing alumina, are effective in adsorbing mercaptan in kerosene. The adsorption capacity of 226mg/g was obtained when the initial concentration of mercaptan was 456. 9mg-S/L in kerosene. The adsorption results showed that the mercaptan uptake processes followed the second-order kinetic model, and can be described by the first-order rate expression of Lagergren. The second-order rate constant, k2, varied from 3. 86× 10-5 to 43. 64× 10-5g·mg-1·min-1, and decreased with increasing initial concentration of mercaptan in liquid. The firstorder rate constant, k1, ranged from 6. 00×10-3 to 14. 28× 10-3 min-1, and increased with increasing initial concentration of mercaptan in kerosene. The isotherm, for the sorption of mercaptan on copper-containing alumina, fit Langmuir equation better and can be expressed by Freundlich model. The monolayer maximal sorption capactity q0, calculated by Langmuir model, is 222. 2mg/g.

关 键 词：含铜氧化铝 吸附 煤油 硫醇 

分 类 号：O647.32[理学—物理化学]