Insight into essential channel effect of pore structures and hydrogen bonds on the solvent extraction of oily sludge

Ming Zhao; Xiangyu Wang; Dong Liu; Zhiheng Li; Shuhai Guo; Wei Zhu; Nan Shi; Fushan Wen; Jian Dong

doi:10.1016/j.jhazmat.2019.121826

Insight into essential channel effect of pore structures and hydrogen bonds on the solvent extraction of oily sludge

J Hazard Mater. 2020 May 5:389:121826. doi: 10.1016/j.jhazmat.2019.121826. Epub 2019 Dec 4.

Authors

Ming Zhao¹, Xiangyu Wang², Dong Liu³, Zhiheng Li², Shuhai Guo⁴, Wei Zhu⁵, Nan Shi², Fushan Wen², Jian Dong⁵

Affiliations

¹ State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, 266555, China; College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
² State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, 266555, China.
³ State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, 266555, China. Electronic address: liudong@upc.edu.cn.
⁴ Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China.
⁵ Sinopec Energy Conservation and Environmental Protection Engineering Technology Co. Ltd, China.

PMID: 31848099
DOI: 10.1016/j.jhazmat.2019.121826

Abstract

In this study, solvent extraction experiments were conducted to investigate the channel effect of pore structures and hydrogen bonds by analyzing the desorption behavior of oil components. The highest oil recovery efficiency was 87.9 % under optimum conditions. Pore structure of oily sludge was analyzed by N₂ adsorption-desorption analysis and scanning electron microscope (SEM) measurements. Mesopores of sludge inhibited the desorption of oil molecules by analyzing the pore width and cumulative pore volume of residual sludge in desorption process. In addition, saturates and aromatics were easily extracted from sludge, while the desorption rate and desorption efficiency of oily sludge were limited by resins and asphaltenes respectively through component analysis and kinetic analysis. Furthermore, channel effect of pore structures and hydrogen bonds was investigated in the desorption process of oily sludge, which also provided a guidance to selectively extract light components from oily sludge with high efficiency in industry processing.

Keywords: Channel effect; Extraction; Hydrogen bonds; Oily sludge; Pore structures.

Publication types

Research Support, Non-U.S. Gov't