College of Chemistry and Chemical Engineering,Shanxi Datong University
Engineering Research Center of Coal-basedEcological Carbon Sequestration Technology of the Ministry of Education,Shanxi Datong University
Shanxi Research Institute ofApplied Chemistry
College of Chemical Engineering and Technology,Taiyuan University of Technology

低阶煤热解及催化解聚过程的精确描述是反应器多尺度模拟、反应器设计和放大的基础和关键。因此,基于低阶煤非等温热解试验及催化裂解试验,提出了一种简单、精密度高且易与反应器多尺度模拟耦合的低阶煤解聚模型,并将该模型与反应器模拟中采用最多的一步反应动力学模型和分布活化能模型(DAEM)进行对比。最后验证了4种催化剂催化低阶煤的催化裂解试验数据对该模型的适应性。结果表明,提出的新模型能很好地模拟低阶煤热解整个过程,相较一步反应模型和分布活化能模型(DAEM),该模型不仅简单,且模拟精度高很多,可达0.99以上。4种催化剂催化煤样的热解模拟结果表明,本模型能很好模拟催化剂催化解聚过程,证明本模型简单、模拟精度高,且适用范围更广,适用性更高。因此提出的低阶煤解聚模型具有与多尺度反应器模拟相结合的显著优势,丰富了煤热解的动力学体系,也为反应器的模拟与放大提供了更简单、精确的方法。

The accurate description of low-rank coal pyrolysis and catalytic depolymerization process is the basis and key to multi-scalesimulation, design and scale - up of reactors. Therefore, a simple, high - precision, and easily coupled low order coal depolymerization model with multi-scale reactor simulation was proposed based on the non-isothermal pyrolysis and catalytic pyrolysis experiments oflow rank coal. The proposed model was compared with the one-step kinetic model and the distributed activation energy model (DAEM)which were most commonly used in reactor simulation. Finally, the adaptability of the model was verified by the experimental data of catalytic cracking of coal samples catalyzed by four catalysts. The results show that the new model proposed in this study can effectively simulate the whole process of low-rank coalpyrolysis. Compared with the one-step reaction model and the distribution activation energy model(DAEM), the model is not only simple, but also has a much higher simulation accuracy than those two models, reaching over 0.99. Inaddition, the pyrolysis simulation results of coal samples catalyzed by four catalysts show that the model can also simulate the catalytic depolymerization process very well, which further proves that the model is not only simple and accuracy, but also with wider range of application and higher applicability. It can be seen that the model proposed in this study has significant advantages in combining with multiscale reactor simulation. The proposed model not only enrichs the kinetic system of coal pyrolysis, but also provides a simpler and more accurate method for the simulation and amplification of the reactor.

国家自然科学基金青年科学基金资助项目(21908135);山西省面上基金资助项目(201901D211435,201901D111308);山西省留学回国人员科技活动择优资助项目(2019-20);山西大同大学博士科研启动基金资助项目(2018-B-01,2020-B-02)

吕婧,王俊丽,张进,等.低阶煤热解及催化解聚动力学[J].洁净煤技术,2023,29(12):59-64.

LYU Jing,WANG Junli,ZHANG Jin,et al.Kinetics of pyrolysis and catalytic depolymerization of low rank coal[J].CleanCoal Technology,2023,29(12):59-64.