移动床轻烃芳构化催化剂再生烧焦模型的开发及工业应用

为更好地研究移动床轻烃芳构化待生催化剂的再生烧焦，开发出可适用于多元条件下烧焦的两段注氧、两段控温的催化剂烧焦模型。该模型将催化剂烧焦床层分段，每段床层采用不同的烧焦条件；采用微元法将催化剂各段床层分为满足模拟精度要求的若干环形微元；以试验得到的工业化轻烃芳构化催化剂的宏观动力学方程为基础，基于微元内的催化剂碳、氢质量衡算及微元内的燃烧、传热的衡算，得到整个床层各处的碳、氢、氧含量与温度分布情况。经工业验证，实测数值与模型预测值吻合较好，为移动床轻烃芳构化技术的进一步推广应用提供了技术支撑。

DEVELOPMENT AND INDUSTRIAL APPLICATION OF COKE BURNING MODEL FOR LIGHT HYDROCARBON AROMATIZATION CATALYST REGENERATION IN MOVING BED

In order to study the coke burning on light hydrocarbon aromatization catalyst in moving bed, a catalyst coke burning model with two stages of oxygen injection and two stages of temperature control was developed. In the model, the catalyst bed is divided into several sections, and different conditions are adopted in each section. The catalyst bed was divided into several annular micro-cells which satisfied the requirement of simulation precision. Based on the experimental macro-kinetic equation of the commercial light hydrocarbon aromatization catalyst, the content and temperature distribution of carbon, hydrogen and oxygen in the whole bed were obtained based on the mass balance of carbon and hydrogen in the catalyst cell and the balance of combustion and heat transfer in the cell. The measured values in industry were in good agreement with the predicted values of the model, which provided technical support for the further popularization and application of the mobile bed aromatization technology.