潘冬辉,赵巧男,徐洪涛.褶皱式玻璃纤维基底的钒基催化剂性能研究[J].内燃机工程,2022,43(5):1-7.
褶皱式玻璃纤维基底的钒基催化剂性能研究
Study on the Performance of Vanadium Catalyst on Folded Glass Fiber Substrates
DOI：10.13949/j.cnki.nrjgc.2022.05.001
关键词:基底  钒基催化剂  氨氮比  NOx  空速  NH3泄漏
Key Words:substrate  vanadium catalyst  ammonia nitrogen ratio  NOx  space velocity  NH3 slip
基金项目:国家重点研发计划项目（2021YFF0600600）
作者单位E-mail
潘冬辉* 上海理工大学 能源与动力工程学院，上海 200093 1258830019@qq.com 
赵巧男 上海理工大学 能源与动力工程学院，上海 200093  
徐洪涛* 上海理工大学 能源与动力工程学院，上海 200093 htxu@usst.edu.cn 
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摘要:基于NH3选择性催化还原（selective catalytic reduction， SCR）反应机理，对采用褶皱式玻璃纤维基底的钒基催化剂在重型柴油机中的应用性能进行模拟研究，并与传统堇青石基底钒基催化剂进行对比。利用国六发动机台架测试结果对模拟程序进行了验证，然后研究了氨氮比、NO2/NOx比及空速对褶皱式玻璃纤维基底的钒基催化剂在低温下NOx转化及NH3泄漏特性的影响。结果表明：低温下褶皱式玻璃纤维基底钒基催化剂的NOx转化性能明显优于相同条件下的堇青石基底钒基催化剂。氨氮比的增加对褶皱式玻璃纤维基底的钒基催化剂的NOx转化性能无明显影响；当氨氮比从0.8增加到1.2时，在200 ℃~500 ℃的区间内NH3的泄漏量由1×10-6提高到100×10-6。NO2/NOx比增加可有效提高钒基催化剂的低温性能。当温度为150 ℃时，NO2/NOx比由0提高为0.5，钒基催化剂的NOx的转化效率从14.0%上升到76.0%，而NH3泄漏量由428×10-6下降为9×10-6。当温度为200 ℃时，30 000 h-1空速下钒基催化剂的NOx转化效率为98.5%，比90 000 h-1下提升近30.0%；NH3泄漏量为7×10-6，比90 000 h-1下降低150×10-6。
Abstract:According to the mechanism of NH3–selective catalytic reduction（SCR）， the application performance of vanadium catalyst with folded glass fiber substrate in heavy diesel engine was simulated and compared with that of vanadium catalyst with traditional cordierite. The simulation program was verified by the test results of China Ⅵ engine test bench. Then the effects of ammonia nitrogen ratio， NO2/NOx ratio and space velocity on NOx conversion and NH3 slip characteristics at low temperature were studied. The results show that the NOx conversion performance of vanadium catalyst with folded glass fiber is better than that of vanadium catalyst with cordierite under the same conditions at low temperature. The increase of ammonia nitrogen ratio has no significant effect on the NOx reduction performance of vanadium catalyst with folded glass fiber at low temperature. When the ammonia nitrogen ratio increases from 0.8 to 1.2， the slip of NH3 increases from 1×10-6 to 100×10-6 in the range of 200 ℃~500 ℃. At the temperature of 150 ℃， NO2/NOx ratio increases from 0 to 0.5， the NOx conversion efficiency of vanadium catalyst with folded glass fiber increases from 14.0% to 76.0%， and NH3 slip decreases from 428×10-6 to 9×10-6. At 200 ℃， the NOx conversion efficiency of vanadium catalyst with folded glass fiber is 98.5% at 30 000 h-1 space speed， which is nearly 30.0% higher than that at 90 000 h-1. And the NH3 slip is 7×10-6， which is 150×10-6 lower than that at 90 000 h-1.
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