Selective Catalytic Reduction (SCR)is the key technology for diesel effluent to meet today's emission standards. The De NOx efficiency is directly determined by the activities of the catalyst. In purpose of precisely and efficiently evaluating the activities of the catalysts, a device that is intelligently controlled by robots for evaluations of the activities of SCR catalytic ensembles is presented in this research. The device is using circulated hot air heating to maintain the temperature of the catalyst sample. By separating the reaction channels from the heating air, NO and Ammonia mixture is flowing through a small portion of the heated catalyst substrate while the NO concentration is monitored continuously. In this way, NO conversion rate and temperature curve is measured. Under the conditions of space speed 40000 h-1, NO initial concentration of 1.2 ‰, in the temperature range of 150℃ to 250℃, the conversation rates of a V2O5/WO3/TiO2 SCR catalytic ensemble sample are from 18% to 88%. The stability and intelligent level of the device are also tested by evaluating the SCR catalytic ensemble samples. The same sample is tested twice and the conversion curves are overlapped. For comparisons, the samples are also tested in a micro reactor and a diesel engine bench. Results attained in all these test fixtures are comparable. In addition, the cost of testing a sample on the device is only 1% of that when tested on a diesel engine bench. The intelligent device described in this research is a well-designed non-destructive test fixture. It is non-destructive, similar to a diesel engine bench, and is also very economical and easy to operate, similar to a micro reactor. The device can be used for daily operation of scale up experiments, as well as for products inspections.%为了准确、高效地评价选择性催化还原(Selective Catalytic Reduction,SCR)催化剂的催化活性,本文研制出了一种智能机器人控制的柴油机尾气脱硝SCR整体式催化剂的催化活性测试装置,并以V2O5/WO3/TiO2整体式催化剂测试对象,验证了该装置具有很好的稳定性及智能性.同时,把同等条件下的催化剂分别在实验室小样评价装置及发动机台架上进行了测试,并把不同装置上的测试结果进行了对比.3种测试装置测试结果的对比表明,同样催化剂在不同台架上测试结果相近.本文开发出的智能型柴油机尾气脱硝SCR整体式催化剂非破坏性测试装置设计合理,既具有台架测试装置的非破坏性又具有实验室小样测试装置的操作经济简便,能够有效地完成整体式催化剂催化活性评价.该装置可以方便地应用于中试水平实验的日常使用,也可用于产品性能的检测.
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