|本期目录/Table of Contents|

[1]游梦云,巫树锋,张彰*,等.Ce改性V基催化剂及其低温脱硝性能[J].石化技术与应用,2025,1:74-79.
　YOU Meng-yun,WU Shu-feng,ZHANG Zhang,et al.Ce modified V-based catalyst and its low-temperature denitrification performance[J].Petrochemical technology & application,2025,1:74-79.
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Ce改性V基催化剂及其低温脱硝性能(PDF)

《石化技术与应用》[ISSN:1009-0046/CN:62-1138/TQ]

期数:
2025年1期
页码:
74-79
栏目:
出版日期:
2025-01-10

文章信息/Info

Title:
Ce modified V-based catalyst and its low-temperature denitrification performance
文章编号:
1009-0045（2025）01-0074-06
作者:
游梦云1; 2; 巫树锋2; 张彰1*; 王玉斌2; 冯小童2
（1．西北师范大学 化学化工学院，甘肃 兰州 730060；2．中国石油石油化工研究院 兰州化工研究中心，甘肃 兰州730060）
Author(s):
YOU Meng-yun1; 2;  WU Shu-feng2;  ZHANG Zhang1;  WANG Yu-bin2;  FENG Xiao-tong2
（1.College of Chemistry and Chemical Engineering， Northwest Normal University， Lanzhou 730060， China；2. Lanzhou Petrochemical Research Center， Petrochemical Research Institute， PetroChina， Lanzhou 730060， China）
关键词:
Ce改性; V基催化剂; 脱硝性能; 氮氧化物; 协同作用
Keywords:
Ce modification; V-based catalyst; denitrification performance; nitrogen oxides; synergistic effect
分类号:
TQ 426.8
DOI:
DOI：10.19909/j.cnki.ISSN1009-0045.2025.01.0074
文献标识码:
B
摘要:
采用浸渍法制备了Ce改性V基催化剂，利用X射线衍射仪、物理吸附和化学吸附等方式进行表征，并通过双通道微反评价装置对催化剂脱硝性能进行了评价。结果表明：Ce的引入会降低V基催化剂比表面积，但能增强V和W的低温氧化还原能力以及增加催化剂上弱酸性位和中强酸性位，并且还能促进氮氧化物（NOx）在催化剂表面的吸附和氧化；Ce，V，W之间具有正向协同作用，V基催化剂中Ce的引入能够在不影响低温脱硝性能的同时减少V的使用，催化剂Ce5V0.5WTi上N2选择性不低于98%，N2O质量浓度不高于3 mg/m3。
Abstract:
The Ce modified V-based catalyst was prepared by impregnation method， characterized by X-ray diffraction， physical adsorption and chemisorption， and the denitrification performance of the catalyst was evaluated by double-channel micro-inverse evaluation device. The results showed that the introduction of Ce could reduce the specific surface area of V-based catalyst， but could enhance the low-temperature redox ability of V and W and increase the weak acid sites and medium-strong acid sites on the catalyst， and could also promote the adsorption and oxidation of nitrogen oxides （NOx） on the catalyst surface. There was a positive synergistic effect between Ce， V and W. The introduction of Ce in V-based catalyst could reduce the use of V without affecting the low-temperature denitrification performance. The N2 selectivity on the catalyst Ce5V0.5WTi was not less than 98%， and the N2O mass concentration was not higher than 3 mg/m3.

参考文献/References

［1］ Shao X Z， Wang H Y， Yuan M L， et al.Thermal stability of Si-doped V2O5/WO3-TiO2 for selective catalytic reduction of NOx by NH3［J］.Rare Metals，2019，38（4）：292-298.［2］ Liu H P， Shang C X， Hong J O， et al.The contradictory impact of sulfation on a CeOx /TiO2 NH3-SCR catalyst：A combined experimental and DFT study［J］.Energy & Fuels，2023，37（9）：6674-6682.［3］ Wang X H， Liu C X， Song C F， et al. Application of metal-organic frameworks for low-temperature selective catalytic reduction of NOx with NH3［J］.Progress in Chemistry，2020，32（12）：1917-1929.［4］ Bae Y K， Kim T W， Kim J R， et al.Enhanced SO2 tolerance of V2O5- Sb2O3 /TiO2 catalyst for NO reduction with co-use of ammonia and liquid ammonium nitrate［J］.Industrial & Engineering Chemistry Research， 2021，96：277-283.［5］ Park J H， Nguyen T P， Kim M H， et al.Effect of vanadium oxide loading for the simultaneous NO reduction and Hg0 oxidation over a V2O5-WO3 /TiO2 catalyst［J］.Industrial & Engineering Chemistry Research， 2023，62（50）：21599-21608.［6］ Zhang Y P， Guo W Q， Wang L F， et al.Characterization and activity of V2O5-CeO2 /TiO2-ZrO2 catalysts for NH3-selective catalytic reduction of NOx［J］.Chinese Journal of Catalysis，2015，36（10）：1701-1710.［7］ He L C， Wang X F， Liu C F， et al.Modulating multi-active sites in CeO2-modified MnOx /ZSM-5 catalyst for selective catalytic oxidation of diethylamine［J］.Applied Catalysis A： General，2022，648：118929.［8］ Wang Y J， Ge D J， Chen M X， et al.A dual-functional way for regenerating NH3-SCR catalysts while enhancing their poisoning resistance［J］. Catalysis Communication，2018，117：69-73.［9］ Li Y Y， Zhang T R， Niu X Y， et al.Vanadium-based catalysts for selective catalytic reduction of NOx with ammonia：Synthesis， poisoning mechanism， regeneration methods and research prospects［J］.Fuel，2024，365：131184.［10］ Tian X， Xiao Y， Zhou P， et al. Investigation on performance of V2O5-WO3-TiO2-cordierite catalyst modified with Cu， Mn and Ce for urea-SCR of NO［J］.Materials Research Innovations，2014，18（Z 2）：202-206.［11］ Guo X， Ding Z Y， Kang N， et al.Ce enhanced low-temperature performance of Mn modified Cu-Beta zeolite catalyst for NH3-SCR［J］.Fuel，2024，361：130694.［12］ Zhang Q， Li Z F， Cui J X， et al.Efficiency of temperature on Ce and La doping Cu modified IM-5 catalyst in DeNOx performance and SO2 /H2O resistance［J］.Research on Chemical Intermediates， 2023，49（11）：4997-5013.［13］ Zhang H， Han J， Niu X W， et al.Study of synthesis and catalytic property of WO3 /TiO2 catalysts for NO reduction at high temperatures［J］.Journal of Molecular Catalysis A： Chemical，2011，350（1/2）：35-39.［14］ Tarjomannejad A， Niaei A， Farzi A， et al.Catalytic oxidation of CO over LaMn1-xBxO3（B= Cu， Fe） perovskite-type oxides［J］.Catalysis Letters，2016，146：1544-1551.［15］ Zhao X T， Yan Y Y， Mao L， et al.A relationship between the V4+/V5+ ratio and the surface dispersion， surface acidity， and redox performance of V2O5-WO3 /TiO2 SCR catalysts［J］.RSC Advances， 2018，8（54）：31081-31093.［16］ Yang W W， Liu F D， Xie L J， et al.Effect of V2O5 additive on the SO2 resistance of a Fe2O3 /AC catalyst for NH3-SCR of NOx at low temperatures［J］.Industrial & Engineering Chemistry Research， 2016，55（10）：2677-2685.［17］ Jiang Y， Xu Y C， Sun X， et al.Dual-edged sword effects of sulfation/hydration on Ce-doped TiO2 （001） single-atom catalyst for NH3-SCR reaction： A first-principles study［J］.Fuel，2024，363：131039.［18］ Li J B， Luo J W， Song Z X， et al.CeO2-WO3 catalysts for the selective catalytic reduction of NOx with NH3：Effect of the amount of WO3［J］.Reaction Kinetics， Mechanisms and Catalysis，2021，132：655-669.［19］ Reiche M A， Ortelli E， Baiker A.Vanadia grafted on TiO2-SiO2， TiO2 and SiO2 aerogels： Structural properties and catalytic behaviour in selective reduction of NO by NH3［J］.Applied Catalysis B： Environmental，1999，23（2/3）：187-203.［20］ Song I， Youn S， Lee H， et al.Effects of microporous TiO2 support on the catalytic and structural properties of V2O5 /microporous TiO2 for the selective catalytic reduction of NO by NH3［J］.Applied Catalysis B： Environmental，2017，210：421-431.［21］ Kong M， Liu Q C， Zhu B H， et al.Synergy of KCl and Hgel on selective catalytic reduction of NO with NH3 over V2O5-WO3 /TiO2 catalysts［J］.Chemical Engineering Journal，2015，264：815-823.［22］ Hu G， Yang J， Tian Y M， et al.Effect of Ce doping on the resistance of Na over V2O5-WO3 /TiO2 SCR catalysts［J］.Materials Research Bulletin，2018，104：112-118.［23］ Lee K J， Kumar P A， Maqbool M S， et al.Ceria added Sb-V2O5 /TiO2 catalysts for low temperature NH3 SCR：Physico-chemical properties and catalytic activity［J］.Applied Catalysis B： Environmental，2013，142/143（10）：705-717.［24］ Chen L， Li J H， Ge M F.Promotional effect of Ce-doped V2O5-WO3 /TiO2 with low vanadium loadings for selective catalytic reduction of NOx by NH3［J］.The Journal of Physical Chemistry C，2009，113（50）：21177-21184.［25］ Busca G， Lietti L， Ramis G， et al.Chemical and mechanistic aspects of the selective catalytic reduction of NOx by ammonia over oxide catalysts： A review［J］.Applied Catalysis B： Environmental，1998，18（1/2）：1-36.［26］ 蒋旻蒋， 邵迅哲， 王丽， 等.CeO2对钒基催化剂NH3-SCR反应性能的影响［J］.中国稀土学报，2021，39（5）：750-758.［27］ Hu H， Cai S X， Li H R， et al. In situ DRIFTs investigation of the low-temperature reaction mechanism over Mn-doped Co3O4 for the selective catalytic reduction of NOx with NH3［J］.The Journal of Physical Chemistry C，2015，119（40）：22924-22933.［28］ Qiu M， Zhan S， Yu H， et al.Facile preparation of ordered mesoporous MnCo2O4 for low-temperature selective catalytic reduction of NO with NH3［J］.Nanoscale，2015，7（6）：2568-2577.［29］ Shishkin A， Carlsson P A， Skoglundh M.Effect of preparation procedure on the catalytic properties of Fe-ZSM-5 as SCR catalyst［J］.Topics in Catalysis，2013，56：567-575.［30］ Zhou X J， Xu Z S， Zhang T， et al.The chemical status of indium in indium impregnated HZSM-5 catalysts for the SCR of NO with CH4［J］.Journal of Molecular Catalysis A： Chemical，1997，122（2/3）：125-129.［31］ Li J H， Hao J M， Fu L X， et al.Cooperation of Pt/Al2O3 and In/Al2O3 catalysts for NO reduction by propene in lean burn condition［J］.Applied Catalysis A： General，2004，265（1）：43-52.［32］ Li J H， Hao J M， Cui X Y， et al.Influence of preparation methods of In2O3/Al2O3 catalyst on selective catalytic reduction of NO by propene in the presence of oxygen［J］.Catalysis Letters，2005，103：75-82.

备注/Memo

备注/Memo:
中国石油天然气股份有限公司资助项目（项目编号： 23-LH-52-01）
更新日期/Last Update: 2025-01-10