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Promotional effect of Ce in NH3-SCO and NH3-SCR reactions over Cu-Ce/ SCR catalysts
Wenjie Liu,Yifei Long,Shinian Liu,Yongyan Zhou,XinTong,Yajie Yin,Xiaoyi Li,Kang Hu,Jiangjun Hu 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.107 No.-
Commercial V-W-Ti catalysts were modified with Cu and different contents of Ce to remove slip ammoniaand remaining nitrogen oxide from the end stage of SCR technology. The activities of NH3 oxidation byO2 (NH3-SCO) and NO reduction by NH3 (NH3-SCR) of these catalysts were examined from 150 to 400 ℃. The consequences indicated that the addition of Ce and Cu could considerably enhance NH3 oxidation andNO reduction capacity of the catalysts and Ce was conducive to reduce the detrimental effects of H2O andSO2. The characterization tests indicated that the surface active oxygen increased because of the interactionbetween V, Cu and Ce. Moreover, the loaded Ce and Cu contributed to enhance the surface acidityand redox property of SCR catalysts.
Meng Li,Jiuzhi Xu,Xing-long Xiong,Yuzhao Ma,Yifei Zhao 한국광학회 2018 Current Optics and Photonics Vol.2 No.1
As a sophisticated detection technology, LIDAR has been widely employed to probe low-altitude windshear. Due to the drawbacks of the traditional ramp algorithm, the alarm accuracy of the LIDAR has not been satisfactory. Aiming at settling this matter, a novel method is proposed on the basis of improved signal smoothing and second windshear detection, which essentially acts as a combination of ramp algorithm and segmentation approach, involving the human factor as well as signal fluctuations. Experiments on the real and artificial signals verify our approach.
Investigation on bubble snap-off in 3-D pore-throat micro-structures
Yining Wu,Sisi Fang,Caili Dai,Yongpeng Sun,Jichao Fang,Yifei Liu,Long He 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.54 No.-
Bubble behaviors in the single and cascaded three-dimensional (3-D) pore-throat micromodels were studied at the operating ranging from 0.0007 to 0.0249. It was found that the average size of daughter bubbles decreased with the rising of the pore-throat ratio, length of throat and mother bubble velocity. The variation of the average size of daughter bubbles with capillary number could be scaled with a power law. In addition, the bubble breakup mainly occurred in the first pore-throat structure and the size of the daughter bubbles maintained almost stable.