轻烃芳构化的系统研究(Ⅳ)——微波加热速率与影响因素间的关系

Systematic Studies on Light Hydrocarbon Aromatization (Ⅳ)——The Relationship Between the Microwave Heating Rate and the Influencing Factors

首次报道了轻烃芳构化微波反应技术,系统地研究了微波芳构化反应的场强分布和其控温系统的性能,详细研讨了微波加热速率与微波辐射时间、被加热物质体积及高径比等影响因素的关系,建立了微波辐射时间与微波加热之间的定量关系,从微观角度解释了影响氧化物升温速率诸因素。结果表明,该微波反应系统微波场强分布均匀,控制仪性能可靠;微波辐射时间、被加热物质的体积及高径比对微波加热效果有不同的影响,同时在ZnNi/HZSM-5催化剂上进行了石油液化气芳构化反应试验,在400℃、WHSV=1h-1条件下反应,与常规反应相比,芳烃收率提高17.1%,BTX选择性显著提高。

A set of microwave aromatization reaction technology was reported first time. The distribution of microwave field density and the property of temperature controller were thorough investigated, meanwhile, the relationship among microwave heating rate and influencing factors such as irradiation time, heated material volume and high-diameter ratio was explored in detail, while the quantitative relationship between irradiation time and microwave heating was set up, and yet the influencing factors on the temperature rise rate of oxidant were explained from the viewpoint of microcosmic. Experimental results show that the distribution of microwave field is uniform and the controller performance is reliable; different irradiation time, volumes and ratio high to diameter of heated material have different effects upon temperature, respectively. In the meantime, under the conditions of 400℃, WHSV=1 h -1 , compared with conventional method,microwave aromatization reaction had been done. 17.1% aromatics yield was enhanced and higher selectivity was obtained.