Preparation and Application of Nano Ce-Zr Mixed Oxides Supported H3PW12O40 in Nitrogen Oxide Capture and Decomposition
(0) In this study,nano Ce-Zr mixed oxides (CeZrO) were prepared,and XRD,BET surface areas,TEM and TPD-MS were employed for characterization and mechanism analysis.CeZrO was initially used as support for solid tungstophosphoric acid (H3PW12O40 or HPW) and was found to have promotion effect on the adsorption and decomposition of NOx.After loading with HPW,the NOx adsorption efficiency increased,and the highest efficiency of HPW/CeZrO was 98%,much higher than that of pure HPW (ca.60%).With the increase of HPW loading,the NOx adsorption efficiency tended to reach a peak value before dropping down.The mechanical grinding method was much more suitable than the incipient impregnation method for CeZrO to load HPW.Furthermore,the adsorbed NOx was found to decompose into N2,O2 and N2O,and yields of N2 of 29.7% for HPW/CeZrO was obtained upon heating at a ramp rate of 50 ℃/min.
Nano Ce-Zr mixed oxides H3PW12O40 NOx Adsorption-decomposition
Lin Cheng Rui Wang
School of Environmental Science & Engineering, Shandong University, Jinan 250100, China
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
485-490
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）