粉煤灰对废润滑油中水的吸附热力学

功能材料, 2017, 48(3): 63-71. doi: 10.3969/j.issn.1001-9731.2017.03.011

粉煤灰对废润滑油中水的吸附热力学

欧阳平 ^1, , 范洪勇 ^2, , 张贤明 ^3, , 陈凌 ^4, , 王家序 ^5,

1.重庆工商大学废油资源化技术与装备教育部工程研究中心,重庆 400067;重庆大学机械工程博士后科研流动站,重庆 400044

2.重庆工商大学废油资源化技术与装备教育部工程研究中心,重庆,400067

3.重庆工商大学废油资源化技术与装备教育部工程研究中心,重庆,400067

4.重庆工商大学废油资源化技术与装备教育部工程研究中心,重庆,400067

5.重庆大学机械工程博士后科研流动站,重庆,400044

基金项目: 重庆市教委资助项目(KJ1400637,KJZH14210) 重庆市科委资助项目(cstc2013jcyja50025,cstc2014yykfB90002) 中国博士后科学基金资助项目(2015M582524,2015M582523)

关键词：粉煤灰 , 吸附 , 废润滑油 , 再生 , 热力学

Adsorption thermodynamics of water in waste oil by flyash

Keywords： flyash , adsorption , waste lubricating oil , regeneration , thermodynamics

为将粉煤灰吸附剂应用到废润滑油的吸附再生中,预处理原状粉煤灰,配置以水为吸附质的废润滑油,考察粉煤灰对废润滑油中水的吸附热力学特性.结果表明:预处理后粉煤灰以孔隙较小的介孔和微孔结构为主,比表面积为10.45 m2/g;粉煤灰的平衡吸附量随着平衡浓度的增加而增加,随温度的升高而升高;吸附过程为以范德华力为主的物理吸附,是不可逆的自发过程和吸热过程,升温有利于吸附的进行.

In order to apply the adsorbents of flyash to the regeneration of waste lubricating oil, original flyash was pretreated and waste oil with the unique adsorbent of water was equipped.The equilibrium thermodynamics of the adsorption process were explored.Experiment results showed that pretreated flyash with specific surface area of 10.45 m2/g was primarily composed of micropore and mesopore structure.With the increasing of the equilibrium concentration and the rising of temperature, the equilibrium adsorption from the flyash got increasing, and adsorption process was irreversibly spontaneous, endothermic and given priority to with van der Waals force.The temperature rising was advantageous to the adsorption.

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