克拉玛依稠油性质评价与氧化燃烧动力学参数估算

Property Evaluation and Estimation of Kinetic Parameters of Oxidative Combustion of Heavy Oil in Karamay

针对克拉玛依A1区稠油油样,本实验对其基本性质进行了评价并采用热重分析仪,在空气条件下,对65?C^600?C升温过程中稠油的氧化燃烧特性进行了研究.研究结果表明:随着温度的升高,该稠油试样在空气气氛中的热转化过程经历了低温氧化(LTO)、燃料沉积(FD)和高温氧化(HTO)三个过程;三个过程的失重率分别达到26.9%、6.5%、54.2%,说明在有氧氛围中主要发生高温氧化燃烧反应,温度达590?C后氧化燃烧过程结束.动力学参数估算结果:低温氧化阶段,活化能为22.36 k J/mol,指前因子为2.68 min-1;高温氧化阶段,活化能为81.90 k J/mol,指前因子为1.40×105min-1.

For heavy oil in A1 district of Karamay, The basic properties of the experiment were evaluated and the thermal gravimetric analyzer was used to study on oxidative combustion characteristics of heavy oil in heating process from 65 to 600？C under air condition. The results show：with a rising temperature Karamay A1 heavy oil in the air has gone through three major heat-transfer process：low temperature oxide（LTO）, fuel deposition（FD） and high-temperature oxidation（HTO）, on weightlessness rate of 26.9%,6.5% and 54.2% respectively. These indicate that high-temperature oxidative combustion reaction occurs in the oxygen atmosphere. Oxidative combustion process ends when temperature reaches 590？C Kinetic parameter estimation results：in low temperature oxidation stage, activation energy is 22.36 k J/mol and pre-exponential factor is 2.68 min^-1; in high-temperature oxidation stage, activation energy is 81.90 k J/mol and pre-exponential factor is 1.40×10^5min^-1.