摘要
基于某180万t/a甲醇制烯烃工业装置催化剂再生数据,研究了催化剂的烧焦特性,建立了本征和经验动力学模型并对工业催化剂再生数据进行了拟合。在分析工业上催化剂再生过程特点及再生器操作条件复杂性的基础上,对工业与实验烧焦动力学模型精确度存在差距的原因进行了分析。阐述了甲醇制烯烃工业装置运行中遇到的问题及解决方案,并总结了工业催化剂再生器较优的操作区间。对再生剂和新鲜剂的催化性能进行了比较,发现再生过程中保留少量的积炭有助于避免或缩短反应的诱导期,提高低碳烯烃的选择性。
The kinetics of coke combustion on SAPO-34 molecular sieve in the methanol to olefins（ MTO） process is studied based on the industrial data of a MTO plant. Intrinsic and empirical models are founded and tested by industrial data. Due to the complexity of industrial regenerator,the fitting degree of the models to practical data is relatively low. The problems that occur during the industrialization of MTO process are discussed and the corresponding solutions are proposed. Catalytic properties of regenerated catalyst are tested by fixed fluidized bed. The results show that the coke retained in the regenerated catalyst is helpful to shorten or distinguish the induce period of MTO reaction,which provides guidelines to control coke combustion density and average coke content in MTO reactor.
出处
《现代化工》
CAS
CSCD
北大核心
2014年第5期134-137,共4页
Modern Chemical Industry
基金
神华集团科技创新项目(SHJT-13-24)
关键词
甲醇制烯烃
烧焦特性
工业装置
methanol to olefins（MTO）
kinetics modeling of coke combustion
plant-based
