| dc.description.abstract | Selective Catalytic Reduction (SCR) technology has garnered widespread attention due to its capability to simultaneously remove NO, VOCs, and PCDD/Fs. Industries are facing the challenge, of equipment upgrade to meet the stringent emission standards and multi-pollutant control (MPC) technology is highly attractive as it effectively reduces the costs and space. Sintering process is a major source of air pollutants, including NO, VOCs, and PCDD/Fs. However, the interactions among different pollutants during the simultaneous removal process can affect the removal efficiency. Therefore, this study aims to evaluate the potential of three SCR catalysts for simultaneous removal of NO, toluene, and PCDD/Fs from gas stream. The gas stream contains 200 ppm NO, 200 ppm NH₃, 50 ppm SO₂, 3% O₂, 14% H₂O(g), and 1 ng-TEQ/Nm³ PCDD/Fs. The experimental tests were conducted at a gas hourly space velocity (GHSV) of 5000 h⁻¹ and a temperature of 220°C. To investigate the simultaneous removal of VOCs, toluene (380 ppm) was added to the gas stream for testing. Three different commercial V2O5-MoO3/TiO2 catalysts were applied. The results of XRF, BET, and XRD analysis indicated significant differences in specific surface area and molybdenum content among three VMT catalysts. The experimental results showed that these catalysts indeed possess the capability to simultaneously remove three pollutants from gas stream. Cat-1, with the highest MoO3 content, exhibited the best removal efficiency among the three pollutants, achieving 93.1% for dioxins, 83.3% for NO, and 81.1% for toluene. Additionally, Cat-2, which contains higher sulfur-resistant components such as SiO₂ and WO3, demonstrated higher removal efficiency for NO and PCDD/Fs in the presence of H₂O(g) and SO₂, despite its lower molybdenum content. This might be attributed to the increased acidity caused by sulfur-resistant materials, which influenced the adsorption of ammonia and PCDD/Fs on the catalyst. Destruction efficiency of dioxins and the conversion rate of toluene were positively correlated with the catalyst′s specific surface area and active metal content. Furthermore, limited adsorption and destruction were achieved at the operating temperature of 220°C for highly chlorinated OCDD and OCDF species. The results highlight the variations in pollutant removal efficiency under different gas stream conditions in the MPC process, demonstrating good overall removal efficiency. | en_US |