以硝酸氧化处理后的椰壳活性炭为原料,负载硝酸锰、硝酸铁和硝酸铈等活性物质,经中低温煅烧制备Ce改性Mn-Fe碳基低温抗硫脱硝催化剂。利用固定床脱硝评价实验装置并结合BET、SEM-Mapping、XPS等表征方法研究其低温脱硝性能及抗硫活性。结果表明,Ce改性Mn-Fe碳基催化剂具有高比表面积,且表面Mn均匀分布,较高的Mn⁴⁺、Ce³⁺和表面吸附氧(O_α)含量增强了碳基催化剂脱硝及抗硫性能。在130~220℃的脱硝效率高达99%以上;低SO₂浓度对催化剂脱硝性能基本无抑制作用,持续反应8 h脱硝效率仍高达88.78%。

Coconut shell activated carbon treated by nitric acid oxidation is used as raw material to load with manganese nitrate,ferric nitrate,cerium nitrate and other active substances,then calcined at low-medium-temperature to obtain Ce-modified Mn-Fe carbon-based low-temperature anti-sulfur denitrification catalyst.Its low-temperature denitrification performance and anti-sulfur activity are studied by using a fixed-bed denitrification evaluation experimental device and combining with the characterization methods,such as BET,SEM-Mapping,XPS.Results show that the prepared Ce-modified Mn-Fe carbon-based catalyst has a high specific surface area and a uniform distribution of Mn on its surface.The higher Mn⁴⁺,Ce³⁺ and surface adsorbed oxygen (O_α) contents enhance its denitrification and anti-sulfur performances.The denitrification efficiency of the catalyst exceeds 99% at 130-220℃.The denitrification performance of the catalyst cannot be inhibited at low SO₂ concentration,and the denitrification efficiency remains still 88.78% for 8 h of continuous reaction.

李浩杰(1982),男,硕士,副高级工程师,主要研究方向为电力环保及动力工程,461096378@qq.com;宋涛(1987),男,博士,教授,主要研究方向为污染物控制,通讯联系人,tsong@njnu.edu.cn。