Department of Environmental Science and Engineering, Beijing University of Chemical Technology, Beijing, China.
J Air Waste Manag Assoc. 2012 Mar;62(3):271-7. doi: 10.1080/10473289.2011.646350.
Manganese acetate (MnAc) and manganese nitrate (MnN) were employed as precursors for the preparation of MnAc)/TiO2, Mn (N)/TiO2, Mn(Ac)-Ce/TiO2, and Mn(N)-Ce/TiO2 by impregnation. These complexes were used as catalysts in the low-temperature selective catalytic reduction of NO with NH3. The influence of manganese precursors on catalyst characteristics, the reduction activity, and the stability of the catalysts to poisoning by H2O and SO2 were studied. Experiments showed that Mn(N) produced MnO2 with large grain sizes in Mn(N)/TiO2 catalyst. On the contrary, Mn(Ac) led to highly dispersed and amorphous Mn2O3 in Mn (Ac)/TiO2 catalyst, which had better catalytic activity and stability to SO2 at low temperatures. The doping of cerium reduced the differences in catalytic performance between the catalysts derived from different Mn precursors.
醋酸锰（MnAc）和硝酸锰（MnN）被用作前驱体，通过浸渍法制备 MnAc）/TiO2、Mn（N）/TiO2、Mn（Ac）-Ce/TiO2 和 Mn（N）-Ce/TiO2。这些配合物被用作低温选择性催化还原 NO 与 NH3 的催化剂。研究了锰前体对催化剂特性、还原活性以及催化剂对 H2O 和 SO2 中毒的稳定性的影响。实验表明，在 Mn（N）/TiO2 催化剂中，Mn（N）生成了大晶粒尺寸的 MnO2。相反，在 Mn（Ac）/TiO2 催化剂中，Mn（Ac）导致 Mn2O3 高度分散且无定形，在低温下具有更好的催化活性和抗 SO2 稳定性。铈的掺杂降低了不同 Mn 前体制备的催化剂之间的催化性能差异。
