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作 者:陈国钧[1] 杨祝红[1] 郑仲[1] 冯新[1] 朱建[1] 刘志国[1] 陆小华[1]
机构地区:[1]南京工业大学化学化工学院,江苏南京210009
出 处:《高校化学工程学报》2005年第2期202-207,共6页Journal of Chemical Engineering of Chinese Universities
基 金:江苏省科委应用基础研究基金(BJ98060);江苏省自然科学基金(BS2000013);国家杰出青年科学基金(29925616);国家自然科学基金(20236010;20246002)资助项目。
摘 要:多相光催化体系的光强分布模型建立较为复杂,特别是当液相中有机质具有一定吸光性时更为困难。在多相光催化体系中引入了修正双通量模型后,利用等当量的概念,将有机污染物对光的吸收作用归化到等作用催化剂的量WCa,解决参数决定的问题,从而计算出液-固多相混浆光催化体系环状光反应器中的光强分布。以甲基橙(MO)作为有机污染代表物,实验确定了光催化降解甲基橙的光强、初始浓度与降解速率之间的本征动力学和反应器的停留时间分布曲线。结合上述三个方面建了环状光反应器模型,实验验证其有较好的相关性,对多相光催化环状反应器的设计和改进提供理论参考。The model establishment of luminous intensity distribution is very complicate, especially when the solute in the liquid has luminous absorbability. In this article, the modified two-flux model was used to simulate luminous intensity distribution in the heterogeneous photoreactor. The equivalence concept was applied to determine the parameter WCa, which is the catalytic equivalent of the organic contaminant having luminous absorbability. By this means the parameters in model could be determined and the luminous intensity distribution model of liquid-solid slurry system was built. Using methyl orange (MO) as contaminant model, relation between luminous intensity and degradation velocity, and relation between original concentrate of MO and degradation velocity were determined by experiments. Based on these two relations, the intrinsic kinetic equation can be formed. Resident time distribution was also measured, and the annular reactor model was built by combining above three aspects. Results show that the agreement of the model is good and it is helpful for the design of heterogeneous liquid annular reactor.
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