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Study on Denitration Performance of Manganese-Modified Sulfuric Acid Activated Rare Earth Tailings Catalyst AITranslate

HOU Li-min; LIU Jia-lin; GAO Hong-min; QIAO Chao-yue; HU Zhi-fei; WU Wen-fei
Key Laboratory of Efficient and Clean Combustion in Inner Mongolia Autonomous Region,School of Energy and Environment,Inner Mongolia University of Sncience&Technology;Key Laboratory of Efficient and Clean Combustion in Inner Mongolia Autonomous Region,School of Energy and Environment,Inner Mongolia University of Sncience&Technology;Key Laboratory of Efficient and Clean Combustion in Inner Mongolia Autonomous Region,School of Energy and Environment,Inner Mongolia University of Sncience&Technology;Key Laboratory of Efficient and Clean Combustion in Inner Mongolia Autonomous Region,School of Energy and Environment,Inner Mongolia University of Sncience&Technology;Key Laboratory of Efficient and Clean Combustion in Inner Mongolia Autonomous Region,School of Energy and Environment,Inner Mongolia University of Sncience&Technology;Key Laboratory of Efficient and Clean Combustion in Inner Mongolia Autonomous Region,School of Energy and Environment,Inner Mongolia University of Sncience&Technology
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Abstract AITranslate

Mn-modified sulfuric acid activated rare earth tailings catalyst was prepared by impregnation method to investigate the effects of sulfuric acid concentration and Mn modification amount on the denitration activity of the catalyst,and its performance was analyzed by BET,XRD,H2-TPR and NH3-TPD.The results show that with the sulfuric acid concentration of 3 mol/L,the reaction temperature window of the catalyst is 350~450℃and its best denitration efficiency of 67%is reached at 400℃.After the addition of 5%Mn,the reaction temperature window of the catalyst moves down to 250~350℃and the N2 selectivity is maintained above 70%with the best denitrification efficiency reaching 86%at 300℃.With the increase of the sulfuric acid concentration,the specific surface area of the catalyst first increases and then decreases,while the pore volume and pore size decrease rapidly.The sulfuric acid activation increases the number of acidic sites on the catalyst surface and improves the adsorption and desorption ability of the catalyst to NH3.Mn element exists in the amorphous form on the catalyst surface.The stronger redox ability of the manganese-modified catalyst in the low temperature section is the main reason for its lower reaction temperature window compared with the sulfuric acid activated catalyst.

KeyWords AITranslate

rare earth tailings NH-SCR catalyst sulfuric acid activation Mn modification denitration performance

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Basic Information:

DOI：

Chinese Library Classification Number:TD983[矿业工程—选矿]

Citation Information:

Mn-modified sulfuric acid activated rare earth tailings catalyst was prepared by impregnation method to investigate the effects of sulfuric acid concentration and Mn modification amount on the denitration activity of the catalyst,and its performance was analyzed by BET,XRD,H2-TPR and NH3-TPD.The results show that with the sulfuric acid concentration of 3 mol/L,the reaction temperature window of the catalyst is 350~450℃and its best denitration efficiency of 67%is reached at 400℃.After the addition of 5%Mn,the reaction temperature window of the catalyst moves down to 250~350℃and the N2 selectivity is maintained above 70%with the best denitrification efficiency reaching 86%at 300℃.With the increase of the sulfuric acid concentration,the specific surface area of the catalyst first increases and then decreases,while the pore volume and pore size decrease rapidly.The sulfuric acid activation increases the number of acidic sites on the catalyst surface and improves the adsorption and desorption ability of the catalyst to NH3.Mn element exists in the amorphous form on the catalyst surface.The stronger redox ability of the manganese-modified catalyst in the low temperature section is the main reason for its lower reaction temperature window compared with the sulfuric acid activated catalyst.

quote

GB/T 7714-2015 [1] HOU Li-min, LIU Jia-lin, GAO Hong-min, et al. Study on Denitration Performance of Manganese-Modified Sulfuric Acid Activated Rare Earth Tailings Catalyst[J]. Rare Metals and Cemented Carbides, 2023(3): 52-58.
MLA [1] HOU Li-min, et al., "Study on Denitration Performance of Manganese-Modified Sulfuric Acid Activated Rare Earth Tailings Catalyst." Rare Metals and Cemented Carbides, no. 3, 2023, pp. 52-58.
APA [1] HOU Li-min, LIU Jia-lin, GAO Hong-min, QIAO Chao-yue, HU Zhi-fei, & WU Wen-fei. (2023). Study on Denitration Performance of Manganese-Modified Sulfuric Acid Activated Rare Earth Tailings Catalyst. Rare Metals and Cemented Carbides(3), 52-58.
IEEE [1] HOU Li-min, LIU Jia-lin, GAO Hong-min, QIAO Chao-yue, HU Zhi-fei, and WU Wen-fei, "Study on Denitration Performance of Manganese-Modified Sulfuric Acid Activated Rare Earth Tailings Catalyst," Rare Metals and Cemented Carbides, no. 3, pp. 52-58, 2023. keywords: {rare earth tailings;NH-SCR catalyst;sulfuric acid activation;Mn modification;denitration performance}