氧体积分数对于对二甲苯液相催化氧化的影响  

Effect of oxygen volume fraction on p-xylene liquid phase catalytic oxidation

作　　者：谢刚[1] 司马坚[1] 王勤波[1] 李希[1] 

机构地区：[1]浙江大学化学工程与生物工程学系,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2004年第8期1024-1028,共5页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(20076039);中国石油化工股份有限公司资助项目(X500029).

摘　　要：对工业反应条件下的对二甲苯氧化过程进行了实验研究,测定了不同氧气体积分率下的液相、气相各组分浓度随时间变化关系.采用双曲型的主、副动力学模型拟合实验数据,得到了各步反应速率常数与氧体积分数的关系式.结果表明,氧对反应的影响随其体积分数的增加而减弱,在某一门槛值以上,反应速率不再明显变化,同时氧体积分数对主反应速率的影响要比对燃烧副反应的影响更为显著.Experiments on p-xylene liquid phase oxidation at different oxygen volume fraction of 3%-37% were carried out to investigate the effect of oxygen volume fraction on main and combustion reactions. A fractional kinetic model was employed to fit the data. The influence of oxygen volume fraction on the rate constants can be represented by a fractional-like relationship. The result shows that the effect of oxygen volume fraction on the reactions decreases with the increase of volume fraction over a schwellenwert value of 7%. In the range of 4%-5% of industrial reaction conditions, the influence of oxygen volume fraction is more remarkable on combustion reaction than on main reaction.

关 键 词：对二甲苯 氧化 动力学 燃烧反应 二氧化碳 

分 类 号：TQ031.7[化学工程]