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Burning of p-xylene and solvent during oxidation is the critical side reaction. In this paper the burning mechanism is analyzed and the kinetics model is developed on the basis of the radical chains reaction mechanism. Model parameters were determined by data fitting of the COx transient response curves. The experimental results showed that, the COx generating rates increased remarkably with increasing Co/Mn ratio and catalyst concentration. As compared with the main reaction, the burning rate was more sensitive to the change of the ratio of cobalt vs manganese, but less to bromine concentration. 相似文献
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氧体积分数对于对二甲苯液相催化氧化的影响 总被引:3,自引:2,他引:3
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. 相似文献
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催化重整装置再接触方案探讨 总被引:1,自引:0,他引:1
对催化重整装置再接触系统的三种流程:低温再接触,常温再接触和常温再接触+吸收,从产品收率,公用工程消耗,设备投资和经济效益方面进行了比较,结论是:对于产氢去PSA的重整装置,若PSA的尾气只作为燃料气时,低温再接触流程优于常温再接触流程;若PSA尾气还要去轻烃回收,则再接触可采用常温再接触,不必采用低温再接触。 相似文献
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