氧化还原
动力学
化学
反应速率常数
微尺度化学
化学动力学
反应速率
氧气
热力学
扩散
化学链燃烧
燃烧
速率方程
化学反应工程
化学工程
物理化学
无机化学
催化作用
有机化学
物理
工程类
数学教育
量子力学
数学
作者
Jiaye Li,Yang Wang,Zhenshan Li
摘要
Abstract The redox kinetics of the oxygen carriers are crucial in Chemical‐Looping Combustion (CLC) systems. The random pore model (RPM) was widely used to investigate the macroscale redox kinetics of oxygen carriers in previous studies, in which the reaction rate constants were obtained just by fitting the experimental data. This study presents a first principle based rate equation (1pRE) applied to the RPM to calculate the reaction rate constants directly using density functional theory (DFT). The 1pRE is integrated with the RPM that accounts for the effect of pore size distribution derived from the surface area evolution of reaction interface and product layer diffusion, thus bridging the gap between the microscale elementary surface reactions and macroscale overall conversion. The developed 1pRE predicts the reduction kinetics of Fe 2 O 3 oxygen carriers accurately, thereby facilitating the optimization of design processes for oxygen carrier materials and the scale up of CLC reactors.
科研通智能强力驱动
Strongly Powered by AbleSci AI