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在耦合辐射、对流和传导三种形式的传热及氧气与二氧化硫传质和化学反应动力学的基础上，首次建立了油页岩灰粒固硫的等温和非等温模型，考虑了由于氧化钙在灰粒中含量较少，且呈微细粒均匀分布，固硫过程中不发生堵孔现象的潜在优势。模型计算结果表明，在６～１０ｍｉｎ内，钙的利用率＞５０％。这显示了油页岩由于其独特的高灰分含量，灰分在流化床燃烧工艺中将发挥固硫作用。颗粒页岩灰固硫属非催化气固反应，传统的研究方法是采用准稳态假设，其结果影响了模型的精度和应用。本研究则考虑了时间变量，建立了气固颗粒反应的瞬态模型，并通过对模型中偏微分方程的离散化处理，开发了一个有界Ｗｅｇｓｔｅｉｎ数值求解方法。此方法具有收敛快、计算精度高等优点。
Based on the heat transfer of coupled radiation, convection and conduction and the mass transfer of oxygen and sulfur dioxide and the kinetics of chemical reaction, an isothermal non-isothermal model of sulfur fixation of oil shale particles was established for the first time. In the ash content is less, and was evenly distributed in the fine particles, sulfur fixation process does not occur in the potential advantages of plugging. The model calculation results show that the utilization rate of calcium is more than 50% in 6 ~ 10min. This shows that oil shale, due to its uniquely high ash content, will exert sulfur fixation in the fluidized bed combustion process. Particle shale ash solid-chalcogenide non-catalytic gas-solid reaction, the traditional research method is the use of quasi-steady-state assumption, the results affect the model accuracy and application. In this study, the time-dependent variables are considered and a transient model of gas-solid particle reaction is established. A bounded Wegstein numerical solution method is developed by discretization of partial differential equations in the model. This method has the advantages of fast convergence, high computational accuracy.