B116型变换催化剂在净化黄磷尾气部分变换中试中的应用研究

Application of B116 shift catalyst in synthetic gas for methanol by partial shift of purified yellow phosphorus off-gas

采用B116型变换催化剂,对黄磷尾气部分变换制甲醇合成气进行中试实验,结果表明,三段催化剂装填方式优于两段装填,三段装填24h内催化剂床层温度稳定,20h时变换炉出口气体达到制甲醇合成气的要求;140h内催化剂床层上部温度不能维持催化剂活性温度,且变换率逐渐降低,100h时H2/CO体积比不能满足制甲醇合成气的要求。因此,将B116型催化剂用于黄磷尾气部分变换制甲醇合成气,存在不能长时间保持稳定的变换率,不能维持床层温度稳定的问题,因此为黄磷尾气综合利用实现工业化,需开发新型耐高浓度CO的变换催化剂。

The pilot test using B116 shift catalyst in synthetic gas for methanol by the partial shift of yellow phosphorus off gas is eonducted. The experimental results indicate that the catalyst made by way of three-section loading is better than that of the two-section loading, by adopting the catalyst of the three-section loading, the temperature of catalyst bed is stable in 24 hours, the outlet gas of shift converter can meet the request for preparation of synthetic gas for methanol at 20 hours, the temperature of the upper catalyst bed can not maintain at the active temperature of catalyst in 140 hours, and the shift rate reduces gradually,the volume ratio of H2 to CO can not satisfy the request of synthetic gas for methanol. Therefore, the Bl16 shift catalyst for synthetic gas for methanol by partial shift of yellow phosphorus off-gas can not be prolonged enough to maintain a stable shift rate,and it can not maintain at the temperature of catalyst bed,so the new shift catalyst must be developed for the comprehensive utilization of yellow phosphorus off-gas, and it must bear the high concentration of CO.