CAJ | 학술논문

为促进抑制焦炭劣化技术进步，用热重分析法测得不同温度下 BP 型抑制剂的抑制焦炭劣化反应动力学实验数据，用未反应核收缩模型对所得数据进行拟合，建立了基于 BP 型抑制剂的抑制焦炭劣化反应动力学模型，确定了模型参数。统计检验表明模型是显著和可信的。根据Arrhenius方程得到BP型抑制剂抑制焦炭劣化反应活化能Ea=285.0 kJ×mol-1和有效扩散活化能 ED=164.6 kJ×mol-1，均高于未添加抑制剂的空白焦炭试样 S0的劣化反应活化能 Ea=142.0 kJ×mol-1和有效扩散活化能ED=96.3 kJ×mol-1。依模型算得的抑制焦炭劣化反应过程中的外扩散传质相对阻力ηG/∑η、内扩散传质相对阻力ηD/∑η和界面化学反应相对阻力ηC/∑η数据表明，试样S0的反应主要受界面化学反应和外扩散影响，而试样 SBP因负载抑制剂，其反应主要受内扩散和界面反应影响。随着反应的进行，两者的劣化反应受内扩散、界面化学反应同时影响。在较低温度下，焦炭劣化反应主要受界面化学反应控制，随反应温度升高，界面化学反应的相对阻力ηC/∑η逐渐下降。
위촉진억제초탄열화기술진보，용열중분석법측득불동온도하 BP 형억제제적억제초탄열화반응동역학실험수거，용미반응핵수축모형대소득수거진행의합，건립료기우 BP 형억제제적억제초탄열화반응동역학모형，학정료모형삼수。통계검험표명모형시현저화가신적。근거Arrhenius방정득도BP형억제제억제초탄열화반응활화능Ea=285.0 kJ×mol-1화유효확산활화능 ED=164.6 kJ×mol-1，균고우미첨가억제제적공백초탄시양 S0적열화반응활화능 Ea=142.0 kJ×mol-1화유효확산활화능ED=96.3 kJ×mol-1。의모형산득적억제초탄열화반응과정중적외확산전질상대조력ηG/∑η、내확산전질상대조력ηD/∑η화계면화학반응상대조력ηC/∑η수거표명，시양S0적반응주요수계면화학반응화외확산영향，이시양 SBP인부재억제제，기반응주요수내확산화계면반응영향。수착반응적진행，량자적열화반응수내확산、계면화학반응동시영향。재교저온도하，초탄열화반응주요수계면화학반응공제，수반응온도승고，계면화학반응적상대조력ηC/∑η축점하강。
In order to improve the inhibition technologies of coke deterioration, the kinetic data of the inhibition reaction of coke deterioration by using the BP inhibitor were obtained from thermogravimetric analysis, and based on the unreacted shrinking core model at different temperatures, the obtained data were used to establish the reaction kinetic models. The model parameters were determined and the statistical tests show that the models are significant and credible. According to the Arrhenius equation the activation energy Ea and the effective diffusion activation energy ED of the inhibition reaction of coke samples loaded BP inhibitor are 285.0 kJ×mol-1 and 164.6 kJ×mol-1, respectively, which are both higher than that of the blank coke samples, 142.0 kJ×mol-1 and 96.3 kJ×mol-1, respectively. Based on the kinetic models, the relative resistances of the external diffusion mass transfer, ηG/∑η, the relative resistances of the internal diffusion mass transfer, ηD/∑η, and the relative resistances of interfacial chemical reaction,ηC/∑ηwere calculated. The calculated results reveal that the inhibition reaction of sample S0 is mainly affected by interfacial chemical reaction and external diffusion, while the inhibition reaction of sample SBP is mainly affected by internal diffusion and interfacial reaction at the beginning of the reaction, and then both samples are affected byηG,ηD andηC simultaneously. In addition, the inhibition reaction is affected by the interfacial chemical reaction at lower reaction temperature, and then theηC/∑ηdecreases with the reaction temperature increase.