油页岩化学结构CPD模型的改进
发布时间:2018-01-12 20:10
本文关键词:油页岩化学结构CPD模型的改进 出处:《中国电机工程学报》2017年02期 论文类型:期刊论文
更多相关文章: 油页岩 热解 化学渗透脱挥发分 动力学参数 TG-FTIR
【摘要】:基于综合热分析仪和傅里叶红外联用技术(TGFTIR),通过引入轻质气体组分官能团模型,改进油页岩化学结构的化学渗透脱挥发分(CPD)模型,实现其对油页岩热解中轻质气体组分析出过程的精确预测。通过TG-FTIR对甘肃窑街油页岩的热解特性进行研究,利用非线性最小二乘法求解轻质气体各组分的动力学参数,预测出其在加热速率为20℃/min的条件下的轻质气体各组分的析出过程。用CPD模型与改进后CPD模型模拟出20℃/min窑街油页岩的热解过程,对比其实际热解过程分析模型的可行性与合理性,再用后验差检验法分析结果的误差。结果表明:油页岩的脱挥发分过程主要分为3个阶段,300-600℃为主要热解阶段,3个阶段的失重率约为5%、16%、6%;各轻质气体析出的活化能E分布在188~249k J/mol之间,而指前因子A在109~1013s-1之间;改进后CPD模型的预测值与实验值相对误差较小,契合度较高,说明改进后CPD模型能够较精确对油页岩热解过程进行预测与模拟。
[Abstract]:Based on the integrated thermal analyzer and Fourier transform infrared (FTIR) technique, the chemical osmotic devolatilization (CPD) model of oil shale was improved by introducing the light gas component functional group model. The analysis process of light gas group in oil shale pyrolysis is accurately predicted. The pyrolysis characteristics of Gansu Yaojie oil shale are studied by TG-FTIR. The nonlinear least square method is used to solve the kinetic parameters of each component of light gas. The precipitation process of light gas components at heating rate of 20 鈩,
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