论文部分内容阅读
以纳米TiO2为载体,通过浸渍法制备改性Mn-Ce/TiO2脱硝催化剂.通过实验考察Mn-Ce/TiO2系低温脱硝催化剂的抗硫性,同时探讨掺杂金属Co对提高催化剂低温抗硫性的机理.活性测试结果显示,Co掺杂能最有效地提高Mn-Ce/TiO2低温催化剂的抗硫性.通过BET、XRD、TG等表征测试,表明Co掺杂可改进Mn-Ce/TiO2催化剂的物化特性,可以有效减少催化剂在含硫气氛中反应时比表面积和孔容的损失,抑制活性物Mn-Ce被S的氧化,催化剂的抗硫性增强.指出了沉积在催化剂表面的是硫铵盐和活性组分硫化形成的金属硫酸盐.
The modified Mn-Ce / TiO2 denitrification catalyst was prepared by impregnation method with nanometer TiO2 as carrier, the anti-sulfur property of Mn-Ce / TiO2 low temperature denitration catalyst was investigated experimentally, and the effects of doping metal Co on improving the low temperature sulfur resistance The results of the activity tests show that Co doping can effectively improve the sulfur resistance of the Mn-Ce / TiO2 low temperature catalyst.The BET, XRD and TG characterization tests show that Co doping can improve the catalytic activity of the Mn-Ce / TiO2 catalyst Which can effectively reduce the specific surface area and pore volume loss when the catalyst is reacted in a sulfur-containing atmosphere, inhibit the oxidation of the active Mn-Ce by S, and enhance the sulfur resistance of the catalyst. It is pointed out that the catalyst deposited on the surface of the catalyst is sulfur Ammonium salts and sulfates of the active components form sulfates.