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| 当系统中含A时，B在停留时间(residence time)接近1.3 s时就全部被脱除，C在停留时间达到3 s时的脱除率为61.5％；当系统中无A时，B仍然有较高的脱除率，但C基本没有脱除效果，C被氧化生成的D在不同的氧浓度下均不到1×10-6；当系统中含A时，E、F、G和H的浓度在停留时间达到3 s时分别为102×10-6、15×10-6、35×10-6和19×10-6，而L的浓度在整个过程中基本为零，被脱除的C全部转化为M，N在反应过程中的浓度很小，随着B的完全脱除，P的浓度开始从零开始升高，反应结束时到达16×10-6；当系统中无A时，Q、R、S和T的浓度随时间变化的趋势与有A情况下基本一致，随着U的浓度增大，B的脱除速率加快，V的浓度变化曲线的峰值增高；在W的浓度接近的情况下，B的脱除速度在有A时比无A时快得多。 |
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gnaguy(金币+20,VIP+0): 8-17 18:41
gnaguy(金币+20,VIP+0): 8-17 18:41
| When the system constains A, B is completely removed when the residence time is close to 1.3 seconds, and the removal rate of C is 61.5% when the residence time reaches three seconds. When the system does not constain A, the removal rate of B is still rather high, but there is almost no removal effect for C, and the concentration of D, oxygenized from C, is below 1*10-6 at all levels of oxygen concentration. When the system contains A and the residence time reaches three seconds, the concentration of E, F, G, and H are 102×10-6, 15×10-6, 35×10-6, and 19×10-6, respectively, whilst the concentration of L is almost zero throughout the entire process. Removed C is converted to M completely. The concentration of N is very small during the reaction. As B being removed completely, the concentration of P rises from zero to 16*10-6 at the end of reaction. When the system does not contain A, trends of change in the concentration of Q, R, S, and T are almost the same as those in a system containing A. As the concentration of U increases, the removal rate of B rises, and the peak of the concentration figure of V is also increased. When the concentration of W is close to that of U, the removal rate of B is much faster in a system containing A than that in a system without A. |
2楼2009-08-17 05:11:37