Effect of additives on sulfur resistance of catalytic filter material during denitrification and synergistic decomposition of 1,2-DCBz

• Published in: Environmental science and pollution research international 2023-09, Vol.30 (43), p.98400-98416
• Main Authors: Wan, Jun, Liu, Meng, Li, Tao, Shi, Guangwei, Duan, Yufeng
• Format: Article
• Language: English
• Subjects: Additives; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Catalytic activity; Cobalt; Copper; Denitrification; Dust filters; Earth and Environmental Science; Ecotoxicology; Effectiveness; Efficiency; Environment; Environmental Chemistry; Environmental Health; Fixed beds; Flue gas; Iron; Manganese; Pollutant removal; Precipitators; Research Article; Sulfur; Sulfur dioxide; Waste Water Technology; Water Management; Water Pollution Control; X ray photoelectron spectroscopy
• ISSN: 1614-7499; 0944-1344; 1614-7499
• DOI: 10.1007/s11356-023-29296-w

Modified Mn-Ce/P84 catalytic filter material can be used to achieve high removal efficiency of NO x and 1,2-DCBz in bag-filtering dust precipitator synergistic removal of multiple pollutants. However, the presence of SO 2 in the actual industrial flue gas has an adverse impact on the catalytic performance of the catalytic filter material. In this paper, a kind of Mn-Ce catalytic filter material was prepared by the impregnation method, which was modified by Fe, Cu, and Co, respectively. As a result, the sulfur resistance of the catalytic filter material was improved. The change of catalytic activity of the three kinds of modified catalytic filter material at different concentrations was compared in the SO 2 flue gas fixed bed system. And the modified catalytic filter materials were characterized by SEM, BET, XPS, XRD, and H 2 -TPR. When the temperature was over 80 °C, different concentrations of SO 2 were injected into the simulated flue gas to test the denitrification activity of the catalytic filter material. The results showed that under the low SO 2 concentration of 150 ppm, the denitrification activity and 1,2-DCBz activity of Fe, Co, and Cu–modified filter material were increased, and the sulfur resistance of Fe was better under the flue gas conditions of 300 ppm and 450 ppm SO 2 . Under the condition of 450 ppm SO 2 and 200 °C reaction, 93.4% denitrification efficiency and 96.1% 1,2-DCBz removal efficiency could be achieved by using modified Fe-Mn-Ce catalytic filter material.