CeTiO 负载金属氧化物催化剂上 NO 的选择性催化还原。
The selective catalytic reduction of NO over CeTiO-supported metal oxide catalysts.
机构信息
State Key Laboratory of Heavy Oil Processing, Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum, Beijing 102249, China.
State Key Laboratory of Heavy Oil Processing, Beijing Key Lab of Oil & Gas Pollution Control, China University of Petroleum, Beijing 102249, China.
出版信息
J Environ Sci (China). 2018 Mar;65:1-7. doi: 10.1016/j.jes.2017.01.016. Epub 2017 Apr 7.
A CeTiO oxide carrier was synthesized via a sol-gel process, and CeTiO supported metal (M=Cd, Mn, Fe, W, Mo) oxide catalysts were prepared by the method of incipient-wetness impregnation. The catalysts were characterized by means of X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET) analysis, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), and Temperature-programmed reduction with H (H-TPR). The catalytic activities for de-NO were evaluated by the NH-SCR reaction. Among all the catalysts tested, the 2wt.% Cd/CeTiO catalyst exhibited the best NH-SCR performance, with a wide temperature window of 250-450°C for NO conversion above 90%. Moreover, the catalyst showed N selectivity greater than 99% from 200 to 450°C.
采用溶胶-凝胶法合成了 CeTiO 载体，并通过浸渍法制备了 CeTiO 负载的金属（M=Cd、Mn、Fe、W、Mo）氧化物催化剂。采用 X 射线衍射（XRD）、BET 分析、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、傅里叶变换红外（FT-IR）光谱、紫外可见漫反射光谱（UV-Vis DRS）和 H 程序升温还原（H-TPR）对催化剂进行了表征。通过 NH-SCR 反应评价了催化剂的脱硝活性。在所有测试的催化剂中，2wt.%Cd/CeTiO 催化剂表现出最好的 NH-SCR 性能，在 250-450°C 温度范围内，NO 转化率超过 90%。此外，该催化剂在 200-450°C 范围内表现出大于 99%的 N 选择性。
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