物理化学学报Issue(2)：453-464,12.DOI:10.3866/PKU.WHXB201512071
1,3-丁二烯热裂解的动力学计算与模型研究
Kinetic Calculation and Modeling Study of 1,3-Butadiene Pyrolysis
摘要
Abstract
1,3-Butadiene is an important product in combustion and pyrolysis of hydrocarbon fuels and it is also an important precursor to form polycyclic aromatic hydrocarbons (PAHs). Currently, a variety of experimental and mechanism studies have been performed on 1,3-butadiene oxidation. However, few studies about pyrolysis mechanism of 1,3-butadiene have been done. In this work, the optimization of the geometries and the vibrational frequencies for the reactants, products, and transition states of the relevant reactions in 1,3-butadiene pyrolysis have been performed at the B3LYP/CBSB7 level. Their single point energies and the thermodynamic parameters are also calculated by using the composite CBS-QB3 method. The high-pressure limit rate constants for tight transition state reactions and barrierless reactions are obtained by transition state theory and variable reaction coordinate transition state theory, respectively. The calculated rate constants in this work are in good agreement with those available from literature. Furthermore, the mechanism of Hidaka et al. is updated with replacing the calculated rate constants of reactions in this work to simulate the shock tube experiment results of 1,3-butadiene pyrolysis and the updated mechanism consists of 45 species and 224 reactions. It can be seen that the updated mechanism can improve the concentration profiles of the main products, ethylene, 1-butylene-3-acetylene, and benzene in 1,3-butadiene pyrolysis. It can also provide reliable kinetic and thermodynamic parameters to further improve the core mechanism of C0-C4 species.关键词
1,3-丁二烯/热裂解机理/速率常数/动力学模拟Key words
1,3-Butadiene/Pyrolysis mechanism/Rate constant/Kinetic simulation分类
化学化工引用本文复制引用
杜鸟锋,甯红波,李泽荣,张其翼,李象远..1,3-丁二烯热裂解的动力学计算与模型研究[J].物理化学学报,2016,(2):453-464,12.基金项目
The project was supported by the National Natural Science Foundation of China (91441114,91441132).国家自然科学基金(91441114,91441132)资助项目 （91441114,91441132）
