固相法催化活化蒽的探讨
发布时间：2019-04-25 16:30
【摘要】：我国原油含稠环芳烃较多,需要经过裂解,才能变成汽油柴油和精细化学品,该过程需要很高的温度,能耗大,而且稠环芳烃在裂解时容易碳化,堵塞反应器和换热器和管道造成重大的经济损失。如果能活化稠环芳烃在稠环芳烃表面引入羟基羧基得到新的物质,不仅能显著降低碳化现象,甚至避免碳化现象,而且还能对生成的新物质进行利用。蒽在多环芳烃中属于结构简单,反应活性低的,如果可以将蒽进行转化,则可以说明本论文中的方法对其他多环芳烃同样适用,采用固相法,分别借助了光催化和微波的方法,对蒽进行活化,对催化剂种类、反应时间、反应温度和微波功率进行了探讨,优化和确定了其适宜条件。本论文的主要结论如下:(1)对比液相法、催化剂吸附法、固相法三种方法,确定了固相法为最佳,设计了一套固相法的反应方案;确定了紫外可见分光光度法与气相色谱质谱联用法测定反应前后物质的量;并确定了蒽的标准浓度曲线。(2)采用固相光催化技术处理蒽的实验中,采用正交实验法,对催化剂种类、反应时间、反应温度进行探讨,影响因素的主次顺序为:催化剂种类反应温度反应时间;在选用铋酸钠的情况下,对反应温度和反应时间分别进行了实验分析,结果显示最佳条件为,铋酸钠,80℃,8h,蒽的转化率达到97.85%,并产生了中间产物蒽醌,生成转化率为81.32%。(3)采用微波活化多环芳烃的实验中,采用正交实验法,对催化剂种类、反应时间、微波功率进行探讨;对两种催化剂分别进行反应时间和微波功率的实验分析,结果显示,二氧化锰下最佳条件为,700W,20min,蒽的转化率为72.26%,但是未产生蒽醌;铋酸钠最佳条件为700W,20min,蒽的转化率为78.65%,有中间产物蒽醌,生成转化率为43.79%。
[Abstract]:The crude oil in China is rich in heavy cyclic aromatic hydrocarbons and needs to be cracked in order to become gasoline, diesel and fine chemicals. The process requires very high temperature, high energy consumption and easy carbonization of polycyclic aromatic hydrocarbons during cracking. Blockage of reactors and heat exchangers and pipes causes significant economic losses. If the polycyclic aromatic hydrocarbons can be activated to introduce hydroxyl carboxyl groups on the surface of the polycyclic aromatic hydrocarbons to obtain new substances, not only the carbonation phenomenon can be significantly reduced, but also the carbonation phenomenon can be avoided, and the new substances can also be utilized. Anthracene belongs to simple structure and low reactive activity in polycyclic aromatic hydrocarbons. If anthracene can be transformed, it can be concluded that the method in this paper is also applicable to other polycyclic aromatic hydrocarbons. The solid phase method is adopted with the aid of photocatalysis and microwave method, respectively. The type of catalyst, reaction time, reaction temperature and microwave power of anthracene were discussed. The optimum conditions were optimized and determined. The main conclusions of this paper are as follows: (1) compared with liquid phase method, catalyst adsorption method and solid phase method, the solid phase method is the best, and a set of solid-phase reaction scheme is designed. The amount of substance before and after the reaction was determined by UV-vis spectrophotometry and gas chromatography-mass spectrometry (GC-MS). The standard concentration curve of anthracene was determined. (2) in the experiment of treating anthracene by solid-phase photocatalysis, the type of catalyst, reaction time and reaction temperature were discussed by orthogonal experiment. The order of influencing factors is as follows: reaction time of reaction temperature of catalyst type; Under the condition of sodium bismuth, the reaction temperature and reaction time were analyzed respectively. The results showed that the conversion of anthracene reached 97.85% at 80 鈩，
本文编号：2465283
[Abstract]:The crude oil in China is rich in heavy cyclic aromatic hydrocarbons and needs to be cracked in order to become gasoline, diesel and fine chemicals. The process requires very high temperature, high energy consumption and easy carbonization of polycyclic aromatic hydrocarbons during cracking. Blockage of reactors and heat exchangers and pipes causes significant economic losses. If the polycyclic aromatic hydrocarbons can be activated to introduce hydroxyl carboxyl groups on the surface of the polycyclic aromatic hydrocarbons to obtain new substances, not only the carbonation phenomenon can be significantly reduced, but also the carbonation phenomenon can be avoided, and the new substances can also be utilized. Anthracene belongs to simple structure and low reactive activity in polycyclic aromatic hydrocarbons. If anthracene can be transformed, it can be concluded that the method in this paper is also applicable to other polycyclic aromatic hydrocarbons. The solid phase method is adopted with the aid of photocatalysis and microwave method, respectively. The type of catalyst, reaction time, reaction temperature and microwave power of anthracene were discussed. The optimum conditions were optimized and determined. The main conclusions of this paper are as follows: (1) compared with liquid phase method, catalyst adsorption method and solid phase method, the solid phase method is the best, and a set of solid-phase reaction scheme is designed. The amount of substance before and after the reaction was determined by UV-vis spectrophotometry and gas chromatography-mass spectrometry (GC-MS). The standard concentration curve of anthracene was determined. (2) in the experiment of treating anthracene by solid-phase photocatalysis, the type of catalyst, reaction time and reaction temperature were discussed by orthogonal experiment. The order of influencing factors is as follows: reaction time of reaction temperature of catalyst type; Under the condition of sodium bismuth, the reaction temperature and reaction time were analyzed respectively. The results showed that the conversion of anthracene reached 97.85% at 80 鈩，
本文编号：2465283
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