文献类型：期刊文献

英文题名：N2O Abatement over Ruthenium Supported on Highly Dispersed Hydrotalcite-Like Composite Metal Oxides

作者：Zhang, Yuanyang[1];Guo, Yaqiong[1];Li, Na[1];Feng, Yaoyu[1]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, Shanghai, Peoples R China

年份：2019

卷号：28

期号：6

起止页码：4477

外文期刊名：POLISH JOURNAL OF ENVIRONMENTAL STUDIES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000489645100041)】；

语种：英文

外文关键词：N2O abatement; composite metal oxides; hydrotalcite-like structure; coprecipitation; programmed impregnation

摘要：Highly dispersive hydrotalcite-like composite metal oxides were prepared by coprecipitation method. CO2-TPD characterization showed that the adsorption capacity over the samples at low (<300 degrees C) and middle (300 similar to 550 degrees C) temperatures was improved by using La or Cu to modify the sample of MgAlO, while slightly reduced at high temperature (>550 degrees C). The experimental results showed that the composite metal oxide, MexOy (Me=La, Mg, Al), had relatively good performance on N2O decomposition. A series of Ru/MexOy catalysts were prepared by programed impregnation method. CO2-TPD analysis indicated that the samples of Ru/MexOy not only increased the total CO2 adsorption capacity, but also obviously enhanced CO2 adsorption capacity at 300 similar to 550 degrees C compared with MexOy. TEM characterization showed that the Ru component was uniformly loaded on the support surface under nanoscale. N2O catalytic decomposition showed that the suitable Ru loading on support was 2.0(wt.)%, i.e., Ru(2.0)/MexOy. Under conditions of (v/v) 10% N2O+82% N-2+5.0% O-2+3.0% H2O, 30000h(-1) of space velocity, 510 degrees C, the stability test showed that N2O conversion remained ca. 95.0%, indicating that Ru(2.0)/MexOy had good stability and activity at relatively low temperature.