On-line monitoring technology for coke precursor in methanol-to-olefins reactor
甲醇制烯烃反应器中积碳前驱体的在线监测技术

摘要

甲醇制烯烃过程中积碳前驱体的生成与积累是影响催化剂寿命与反应效率的关键因素。针对传统离线检测滞后、难以实现实时反馈的不足，研究基于光谱分析、质谱联用与在线红外成像等技术构建了多维度在线监测体系，实现对反应器内部积碳前驱体浓度、结构及分布的动态追踪。结果表明，该体系可在反应早期精准识别芳香族及多烯类前驱体的生成趋势，并结合数据建模实现积碳风险的提前预警。该方法不仅提升了甲醇制烯烃反应器运行的稳定性与经济性，还为工业化装置的智能运维提供了技术支撑，对延长催化剂寿命与优化反应条件具有重要意义。

Abstract

The formation and accumulation of coke precursors during the methanol-to-olefins process are key factors affecting catalyst life and reaction efficiency. To address the shortcomings of traditional offline detection, such as lag and difficulty in achieving real-time feedback, this study constructs a multi-dimensional on-line monitoring system based on technologies including spectral analysis, mass spectrometry, and on-line infrared imaging. This system enables dynamic tracking of the concentration, structure, and distribution of coke precursors inside the reactor. The results show that the system can accurately identify the formation trends of aromatic and polyene precursors in the early stage of the reaction, and realize early warning of coking risks by combining data modeling. This method not only improves the stability and economy of the operation of methanol-to-olefins reactors but also provides technical support for the intelligent operation and maintenance of industrial devices, which is of great significance for extending catalyst life and optimizing reaction conditions.