Enhancing low-temperature thermal remediation of petroleum sludge by solvent deasphalting

Li, Qi1; Sun, Dejun1; Hua, Jifei1; Jiang, Kai1; Xu, Zhenghe2,3; Tong, Kun4

2022-10-01

10.1016/j.chemosphere.2022.135278

CHEMOSPHERE   Impact Factor & Quartile

0045-6535

1879-1298

Thermal treatment is a promising technique for treating petroleum sludge (PS). However, asphaltenes as a recalcitrant fraction of PS induce strong bounding between petroleum and minerals, and therefore lead to the need for high temperature and hence high energy consumption in thermal treatment of PS. In this study, a novel method combining a deasphalting pretreatment of PS with low-temperature thermal desorption (LTTD) was developed. The efficiency of deasphalting was found to be positively correlated to the ability of n-alkanes and asphaltene dispersants in dispersing asphaltenes. In treating six different kinds of PS, the residual oil contents were all below 2.5% after the deasphalting alone. Compared with direct thermal desorption at 600 degrees C for 1 h, dodecyl benzene sulfonic acid (DBSA)-assisted heptane deasphalting made thermal desorption at 350 degrees C for 1 h sufficient to treat these APS. The residual oil content of sludge after LTTD is lower than 0.45%. FT-IR, Raman spectra and XPS analysis confirmed that the carbon residue in APS after LTTD is primarily graphite state, which is extremely stable and does not migrate to the surrounding environment as compared with the crude oil in the APS. Hence, solvent deasphalting results in effective treatment of PS by LTTD, while the solvent can be recycled by distillation and crude oil recovered as value-added petroleum resource. The LTTD represents therefore a novel green strategy for treating PS and resource utilization.

Thermal desorption Asphaltene dispersant Deasphalting pretreatment Petroleum sludge

SCI ; EI

English

Others

Key Program for National Natural Science Foundation of China[21938003] ; Open Project Program of State Key Laboratory of Petroleum Pollution Control of China[PPC2018001]

Environmental Sciences & Ecology

Environmental Sciences

WOS:000813071600004

PERGAMON-ELSEVIER SCIENCE LTD

20222512261661

Asphaltenes ; Distillation ; Energy utilization ; Gasoline ; Heat treatment ; Paraffins ; Petroleum analysis ; Solvents ; Temperature ; Thermal desorption

Environmental Engineering:454 ; Petroleum Deposits:512.1 ; Petroleum Refining:513 ; Liquid Fuels:523 ; Energy Utilization:525.3 ; Heat Treatment Processes:537.1 ; Thermodynamics:641.1 ; Process Heating:642.1 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803

ENVIRONMENT/ECOLOGY

Web of Science

1.Shandong Univ, Key Lab Colloid & Interface Chem, Minist Educ, Jinan 250100, Shandong, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
3.Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 1H9, Canada
4.State Key Lab Petr Pollut Control, Beijing 102206, Peoples R China

Li, Qi,Sun, Dejun,Hua, Jifei,et al. Enhancing low-temperature thermal remediation of petroleum sludge by solvent deasphalting[J]. CHEMOSPHERE,2022,304.

Li, Qi,Sun, Dejun,Hua, Jifei,Jiang, Kai,Xu, Zhenghe,&Tong, Kun.(2022).Enhancing low-temperature thermal remediation of petroleum sludge by solvent deasphalting.CHEMOSPHERE,304.

Li, Qi,et al."Enhancing low-temperature thermal remediation of petroleum sludge by solvent deasphalting".CHEMOSPHERE 304(2022).