Mechanism,Kinetics,and Thermodynamic Characteristics for the Demetallization of Used Lubricating Oil via Pyrolysis  

作　　者：Yang Haiyu Jiang Zhenxin Chu Qingyan Jiang Peng Wang Ming 

机构地区：[1]School of Chemistry and Chemical Engineering,Shandong University of Technology,Zibo 255049,China [2]Shandong Qinghe Chemical Technology Co.,Ltd,Zibo 256405,China [3]School of Chemistry and Chemical Engineering,Qingdao University,Qingdao 266071,China

出　　处：《China Petroleum Processing & Petrochemical Technology》2023年第2期113-127,共15页中国炼油与石油化工（英文版）

基　　金：We are grateful for the support of the Science and Technology Innovation 2025 Major project of Ningbo[2018B10038];the Chair Professorship Program of Shandong University of Technology[117002];the Natural Science Foundation of Shandong Province[ZR2020MB130].

摘　　要：This study analyzed the pyrolysis mechanism,developed a pyrolysis kinetic model,and determined the corresponding thermodynamic parameters for the removal of calcium from used lubricating oil using sulfurized calcium alkyl phenolate(T-115B)as a model compound.The pyrolysis process and products were evaluated by Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy.Visual inspection indicated that the removal of calcium from T-115B depended primarily on the destruction of micelles caused by the pyrolysis of compounds at high temperatures.The pyrolysis characteristics of T-115B at different heating rates were investigated by thermogravimetry and differential thermal analysis,which revealed two distinct pyrolysis phases.Thus,the pyrolysis mechanism can be described by a twostep model.The activation energy and thermodynamic parameters(ΔH,ΔG,andΔS)were determined by applying the Kissinger-Akahira-Sunose,Flynn-Wall-Ozawa,Friedman,and Starink methods;the average activation energies for T-115B pyrolysis obtained using these methods were 115.80,119.84,124.96,and 116.14 kJ/mol,respectively.Further,both stages of the pyrolysis reaction followed Fn mechanisms with n=1.39 in the first stage and n=0.86 in the second stage.This study provides reliable and effective pyrolysis models along with kinetic and thermodynamic parameters to facilitate the largescale industrial application of used lubricating oil.

关 键 词：used lubricating oil sulfurized calcium alkyl phenolate pyrolysis decomposition kinetics THERMODYNAMICS non-isothermal method 

分 类 号：TE624[石油与天然气工程—油气加工工程]