Influence of Sulfuric Acid Concentration on the NH3-SCR Denitration Performance of Mn-Modified Rare Earth Tailings Catalysts AITranslate
Abstract AITranslate
Bayan Obo rare earth tailings were pretreated with sulfuric acid and then loaded with 5%manganese acetate by impregnation and roasted by microwave to prepare denitration catalysts.And the effects of sulfuric acid concentration(0 mol/L,0.5 mol/L,1 mol/L,and 3 mol/L)on the denitration performance of the catalysts were investigated.The catalysts were characterized by XRD,NH3-TPD,H2-TPR,and XPS.The results of denitration activity tests show that the denitration activity of the catalysts at 100~250℃increases at first and then decreases with the increase of sulfuric acid concentration,and reaches the best when the sulfuric acid concentration is 0.5 mol/L.The higher concentration(3 mol/L)of sulfuric acid deteriorates the originally good low-temperature activity of the catalyst.The catalyst treated with 0.5 mol/L sulfuric acid has a wide temperature window with good activity in the range of 150℃to 250℃and the conversion rate of nitrogen oxides reaches 92%at 200℃.The characterization results show that the loaded manganese exists in amorphous state or is highly dispersed on the surface of the rare earth tailings.The concentration of Mn4+on the catalyst surface decreases with the increase of sulfuric acid concentration,and both the ammonia adsorption capacity and redox capacity of the catalysts decrease,thereby reducing the denitration activity.
KeyWords AITranslate
1钟标城,周广英,王文辉,付名利,吴军良,陈礼敏,黄碧纯,叶代启.Fe掺杂对MnO_x催化剂结构性质及低温SCR反应机制的影响[J].环境科学学报,2011,31(10):2091-2101. 被引量：16
2周爱奕,毛华峰,盛重义,谭月,杨柳.碱土金属钙沉积对Mn-Ce/TiO2低温SCR催化剂脱硝性能的影响[J].环境科学,2014,35(12):4745-4751. 被引量：10
3王世磊,章贤臻,李运姣,李建国,唐三川.天然锰矿低温NH3-SCR烟气脱硝催化活性研究[J].矿产综合利用,2020,0(1):76-82. 被引量：4
4李帅,张杰,聂光华.含铁沸石分子筛中硅铝比的测定[J].无机盐工业,2012,44(1):59-60. 被引量：3
5郑昌坤,叶青,程水源,康天放.Cu含量对Cu/ZSM-5催化剂氨选择性催化还原NO影响的研究[J].化工新型材料,2019,47(3):177-180. 被引量：4
6杨振,彭健,张登峰,霍培丽.烟气同时脱硫脱硝技术机理及其综合评价[J].广州化工,2016,44(6):12-14. 被引量：2
7赵悦,刘文辉,于宁,李敏,任广行,杨燕.氮氧化物处理技术及其在催化剂生产中的应用[J].当代化工,2015,44(10):2431-2434. 被引量：7
8毛迪,杨爽,殷成阳.用于NH_(3)-SCR脱硝反应的铜基沸石分子筛催化剂研究进展[J].化工新型材料,2022,50(2):234-239. 被引量：2
1吕长季,王祚涛,汪雪峰,李杰,薛海蒙,夏云进.稀土尾矿对CaO-SiO2-Fe2O3-稀土尾矿渣系脱磷行为的影响[J].冶金工程,2023,10(2):46-55.
1张晓丹,张姗,王红玉,刘洪艳.预处理方式对海带生物质利用性能的影响[J].广东海洋大学学报,2022,42(6):24-29.
2刘金宝,张芬.坡缕石负载Mn-Cu催化剂催化燃烧甲苯研究[J].环境科学与技术,2022,45(11):139-146.
3钟禹,李由,吴越,林琦璇,任俊莉,王欢,杜风光.低酸喷雾协同蒸汽爆破预处理对小麦秸秆结构及酶水解的影响[J].中国造纸学报,2022,37(4):16-24.
4王涛,花玉成,彭佳钰,王海峰,管永华.羽绒活性染料染色工艺及机理[J].染整技术,2023,45(1):25-28.
5孙景丹,杜新伟,金燚翥.影响电化学法制备膨胀石墨的因素[J].炭素,2022(3):15-20.
6李钦钦.改性凹凸棒对沉积物磷释放的控制效果[J].污染防治技术,2022,35(6):3-7.
7何秉轩,梁勇,刘德刚,曾平生,杨飞,廖春发.铅分银炉渣中金属赋存状态分析及银的提取试验研究[J].湿法冶金,2023,42(1):1-7.
8赵田田,齐瑞杰,王莹,洪嘉奇,刘晓刚,赵明新,王虹.La_(0.90)A_(0.10)CoO_(3)催化剂的CO-SCR脱硝性能[J].化学工程,2023,51(1):17-20.
9杨德强,黄楠楠,李冀,吴丽红,周博.不同CuO负载量CuO/SBA-16对CO催化活性的影响[J].化学工程师,2023,37(1):81-83.
10马晶晶,张欢,刘润强,张万庆,韩世星,韩瑾,许光日,李林森,何雨石,马紫峰.锂离子电池用具有三维导电结构的纳米多孔硅高容量负极材料的原位加工[J].中国科学：材料科学（英文版）,2023,66(2):493-504. 被引量：1
Basic Information:
DOI：
Chinese Library Classification Number:TQ426.6[化学工程]
Citation Information:
Bayan Obo rare earth tailings were pretreated with sulfuric acid and then loaded with 5%manganese acetate by impregnation and roasted by microwave to prepare denitration catalysts.And the effects of sulfuric acid concentration(0 mol/L,0.5 mol/L,1 mol/L,and 3 mol/L)on the denitration performance of the catalysts were investigated.The catalysts were characterized by XRD,NH3-TPD,H2-TPR,and XPS.The results of denitration activity tests show that the denitration activity of the catalysts at 100~250℃increases at first and then decreases with the increase of sulfuric acid concentration,and reaches the best when the sulfuric acid concentration is 0.5 mol/L.The higher concentration(3 mol/L)of sulfuric acid deteriorates the originally good low-temperature activity of the catalyst.The catalyst treated with 0.5 mol/L sulfuric acid has a wide temperature window with good activity in the range of 150℃to 250℃and the conversion rate of nitrogen oxides reaches 92%at 200℃.The characterization results show that the loaded manganese exists in amorphous state or is highly dispersed on the surface of the rare earth tailings.The concentration of Mn4+on the catalyst surface decreases with the increase of sulfuric acid concentration,and both the ammonia adsorption capacity and redox capacity of the catalysts decrease,thereby reducing the denitration activity.
quote
| GB/T 7714-2015 | [1] HOU Li-min, HU Zhi-fei, QIAO Chao-yue, et al. Influence of Sulfuric Acid Concentration on the NH3-SCR Denitration Performance of Mn-Modified Rare Earth Tailings Catalysts[J]. Rare Metals and Cemented Carbides, 2022(6): 46-51. |
| MLA | [1] HOU Li-min, et al., "Influence of Sulfuric Acid Concentration on the NH3-SCR Denitration Performance of Mn-Modified Rare Earth Tailings Catalysts." Rare Metals and Cemented Carbides, no. 6, 2022, pp. 46-51. |
| APA | [1] HOU Li-min, HU Zhi-fei, QIAO Chao-yue, & WU Wen-fei. (2022). Influence of Sulfuric Acid Concentration on the NH3-SCR Denitration Performance of Mn-Modified Rare Earth Tailings Catalysts. Rare Metals and Cemented Carbides(6), 46-51. |
| IEEE | [1] HOU Li-min, HU Zhi-fei, QIAO Chao-yue, and WU Wen-fei, "Influence of Sulfuric Acid Concentration on the NH3-SCR Denitration Performance of Mn-Modified Rare Earth Tailings Catalysts," Rare Metals and Cemented Carbides, no. 6, pp. 46-51, 2022. keywords: {rare earth tailings;sulfuric acid pretreatment;Mn modification;catalyst;NH-SCR;low-temperature activity} |