以电石渣为原料，通过KHCO₃改性开发出一种高效、低成本的脱硫脱硝催化剂。考察了浸渍浓度、超声时间、超声功率等制备条件对脱硫脱硝的影响，并对材料进行了XRD、SEM、XPS等表征。结果表明，在最佳条件下二氧化硫（SO₂）和一氧化氮（NO）的去除效率可达到90%和60%。KHCO₃的浸渍浓度对改性电石渣去除NO和SO₂的影响较显著，改性后电石渣表面形成了新的物质且微孔和中孔的结构明显增加。改性电石渣表面形成的含氧官能团C—O、C＝O和表面吸附氧是催化氧化脱除NO和SO₂的关键。

In order to realize the reuse of calcium carbide slag,an efficient and low-cost catalyst for simultaneous desulfurization and denitrification is developed by using calcium carbide slag as raw material and modified by KHCO₃.The effects of impregnation concentration,ultrasonic time and ultrasonic power on the desulfurization and denitrification performances of the catalyst are studied,and the prepared catalyst is characterized by means of X-ray diffraction,scanning electron microscopy,X-ray photoelectron spectroscopy,in situ DRIFTS and so on.It is shown from the study results that the removal efficiencies of sulfur dioxide and nitric oxide can reach 90% and 60%,respectively under the best conditions.The impregnation concentration of KHCO₃ has a significant impact on the removal of sulfur dioxide and nitric oxide by the modified calcium carbide slag.After modification,new substances are formed on the surface of the modified calcium carbide slag,and the structures of micropores and mesoporous pores are obviously increased.The oxygen-containing functional groups such as C-O and C＝O formed on the surface of modified calcium carbide slag and the oxygen adsorbed on the surface are keys to the removal of sulfur dioxide and nitric oxide by catalytic oxidation.

李慧(1999-),女,硕士研究生,研究方向为大气污染控制,1165609912@qq.com