催化裂化再生过程脱硝技术

doi:10.3969/j.issn.0438-1157.2014.07.004

摘要/Abstract

摘要： 系统论述了当前主要的脱硝技术、流化催化裂化（FCC）再生工艺及FCC再生过程NO_x产生和转化规律。O₂是影响催化剂脱硝活性的主要因素，从反应器尺度精确控制烧焦再生反应，严格控制过剩氧含量，是提高脱硝效率的一条可行途径。提出了通过再生器内部结构和工艺设计创造出具有氧化区和还原区多层多区的新型再生工艺脱硝思路。从降低NO_x角度考虑，再生温度应不高于700℃，再生烟气中CO浓度不低于4%，O₂浓度至少低于1%。这种新的再生器脱硝是一种经济、高效的脱硝技术，已在中石油大港石化FCC工业装置得到了初步验证，为FCC再生装置和其他化工过程脱硝提供了新思路。

关键词: 催化裂化, 催化剂, 再生, 脱硝, 多层多区氧化-还原, 一氧化碳

Abstract: The development of NO_x reduction strategy, the fluid catalytic cracking (FCC) regeneration process and the formation and conversion of NO_x are summarized. O₂ is a strong inhibiter of the reaction of NO reduction by CO. It should be an efficient NO_x reduction way by controlling O₂ concentration of the regenerator. A new type of a multi-layer multi-zone with oxidation zone and reduction zone NO_x reduction technology is proposed. This new regeneration process could have characteristics of low carbon content, short regeneration time, high burning intensity, and counter-current contact with catalyst and air. In view of NO_x reduction, regeneration temperature should be less than 700℃, CO concentration in regenerator no less than 4% and O₂ concentration in regenerator less than 1% at least. This novel FCC regenerator technology is a highly efficient and economical NO_x reduction technology, which has been demonstrated in the FCC plant of PetroChina Dagang Petrochemical Company, and might be applied to other FCC process or coal combustion for NO_x reduction.

Key words: fluid catalytic cracking, catalyst, regeneration, NO_x reduction, multi-layer and multi-zone redox, carbon monoxide

中图分类号:

TE992.1

李军, 罗国华, 魏飞. 催化裂化再生过程脱硝技术[J]. 化工学报, 2014, 65(7): 2426-2436.

LI Jun, LUO Guohua, WEI Fei. A novel multi-layer and multi-zone redox FCC regenerator design for removing NO_x gas system[J]. CIESC Journal, 2014, 65(7): 2426-2436.

参考文献 92

[1]	Barth J O, Jentys A, Lercher J A. Elementary reactions and intermediate species formed during the oxidative regeneration of spent fluid catalytic cracking catalysts [J]. Ind. Eng. Chem. Res.,2004, 43: 3097-3104
[2]	Wen Bin (温斌),He Mingyuan (何鸣元),Song Jiaqing (宋家庆),Zong Baoning (宗保宁),Shu Xingtian (舒兴田),Lu Yong (路勇). Study on the reduction of NO by CO in the presence of oxygen [J]. Acta Physico-Chimica Sinica (物理化学学报), 1999, 15 (10): 867-871
[3]	Cerqueira H S, Caeiro G, Costa L, Ribeiro F R. Deactivation of FCC catalysts [J]. Journal of Molecular Catalysis A-Chemical, 2008, 292 (1/2): 1-13
[4]	Chen Junren (陈俊任), Zhou Yasong (周亚松). Effect of citric acid on Ni-W catalysts for hydrotreatment of coking gas oil [J]. Journal of Chemical Industry and Engineering (China)(化工学报), 2007, 58 (9): 2244-2248
[5]	Sundaramurthy V, Dalai A K, Adjaye J. HDN and HDS of different gas oils derived from Athabasca bitumen over phosphorus-doped NiMo/gamma-Al2O3 carbides [J]. Applied Catalysis B: Environmental, 2006, 68: 38-48
[6]	Rana M S, Sámano V, Ancheyta J, Diaz J A I. A review of recent advances on process technologies for upgrading of heavy oils and residua [J]. Fuel, 2007, 86: 1216-1231
[7]	Rajasekar E, Murugesan A, Subramanian R, Nedunchezhian N. Review of NOx reduction technologies in CI engines fuelled with oxygenated biomass fuels [J]. Renewable & Sustainable Energy Reviews, 2010, 14 (7): 2113-2121
[8]	Skalska K, Miller J S, Ledakowicz S. Trends in NOx abatement: a review [J]. Science of the Total Environment, 2010, 408: 3976-3989
[9]	Normann F, Andersson K, Leckner B, Johnsson F. Emission control of nitrogen oxides in the oxy-fuel process [J]. Progress in Energy and Combustion Science, 2009, 35 (5): 385-397
[10]	Chen Yanguang (陈彦广), Wang Zhi (王志), Guo Zhancheng (郭占成). A new denitrification technique with decoupling combustion and flue gas recycling in iron ore sintering process (Ⅰ): Mechanism of denitrification in the simulated sintered ore layer [J]. Journal of Environmental Sciences (环境科学学报),2008, 28 (9): 1720-1726
[11]	Chen Yanguang (陈彦广), Wang Zhi (王志), Guo Zhancheng (郭占成). A new denitrification technique with decoupling combustion and flue gas recycling in iron ore sintering process (Ⅱ): Mechanism of denitrification in the simulated combustion layer [J]. Journal of Environmental Sciences (环境科学学报), 2008, 28 (9): 1727- 1732
[12]	Thomas D, Vanderschuren J. Modeling of NOx absorption into nitric acid solutions containing hydrogen peroxide [J]. Ind. Eng. Chem. Res., 1997, 36: 3315-3322
[13]	Xu Y Y, Zhang Y, Wang J C, Yuan J Q. Application of CFD in the optimal design of a SCR-DeNOx system for a 300 MW coal-fired power plant [J]. Computers and Chemical Engineering, 2013, 49: 50-60
[14]	Kamata H, Ueno S, Naito T, Yukimura A. Mercury oxidation over the V2O5(WO3)/TiO2 commercial SCR catalyst [J]. Ind. Eng. Chem. Res., 2008, 47: 8136-8141
[15]	Huang Haifeng (黄海凤), Zhang Feng (张峰), Lu Hanfeng (卢晗锋), Chen Yinfei (陈银飞). Effect of preparation methods on structures and performance of MnOx/TiO2 catalyst for low-temperature NH3-SCR [J]. CIESC Journal (化工学报), 2010, 61 (1): 80-85
[16]	Sun Lushi (孙路石), Zhao Qingsen (赵清森), Xiang Jun (向军), Shi Jinming (石金明), Wang Lele (王乐乐), Hu Song (胡松), Su Sheng (苏胜). Adsorption of NO and NH3 over CuO/γ-Al2O3 catalyst by DRIFTS [J]. CIESC Journal (化工学报), 2009, 60 (2): 444-449
[17]	Kim M H, Ham S W, Lee J B. Oxidation of gaseous elemental mercury by hydrochloric acid over CuCl2/TiO2-based catalysts in SCR process [J]. Applied Catalysis B: Environmental, 2010, 99 (1/2): 272-278
[18]	Klimczak M, Kern P, Heinzelmann T, Lucas M, Claus P. High-throughput study of the effects of inorganic additives and poisons on NH3-SCR catalysts (Ⅰ): V2O5-WO3/TiO2 catalysts [J]. Applied Catalysis B: Environmental, 2010, 95 (1/2): 39-47
[19]	Lin Q C, Li J H, Ma L, Hao J M. Selective catalytic reduction of NO with NH3 over Mn-Fe/USY under lean burn conditions [J]. Catalysis Today, 2010, 151 (3/4): 251-256
[20]	Toops T J, Nguyen K, Foster A L, Bunting B G, Ottinger A N, Pihl J A, Hagaman E W, Jiao Jian. Deactivation of accelerated engine-aged and field-aged Fe-zeolite SCR catalysts [J]. Catalysis Today, 2010, 151 (3/4): 257-265
[21]	Sawatmongkhon B, Tsolakis A, Sitshebo S, Rodriguez-Fernandez J, Ahmadinejad M, Collier J, Rajaram R R. Understanding the Ag/Al2O3 hydrocarbon-SCR catalyst deactivation through TG/DT analyses of different configurations [J]. Applied Catalysis B-Environmental, 2010, 97 (3/4): 373-380
[22]	Juliana P S S, Manuel F R P, José L F. Modified activated carbon as catalyst for NO oxidation [J]. Fuel Processing Technology, 2013, 106: 727-733
[23]	Liu Qingya (刘清雅), Liu Zhenyu (刘振宇). Review of V2O5-supported carbon based catalyst for SO2 and NO removal from flue gas [J]. Journal of Chemical Industry and Engineering(China)(化工学报), 2008, 59 (8): 1894-1906
[24]	Li P, Liu Q Y, Liu Z Y. Behaviors of NH4HSO4 in SCR of NO by NH3 over different cokes [J]. Chemical Engineering Journal, 2012, 181/182: 169-173
[25]	Zhu Z P, Liu Z Y, Liu S J, Niu H X. A novel carbon-supported vanadium oxide catalyst for NO reduction with NH3 at low temperatures [J]. Applied Catalysis B: Environmental, 1999, 23: L229-L233
[26]	Sun D K, Liu Q Y, Liu Z Y, Gui G Q, Huang Z G. Adsorption and oxidation of NH3 over V2O5/AC surface [J]. Applied Catalysis B-Environmental, 2009, 92 (3/4): 462-467
[27]	Liu Q Y, Liu Z Y, Wu W Z. Effect of V2O5 additive on simultaneous SO2 and NO removal from flue gas over a monolithic cordierite-based CuO/Al2O3 catalyst [J]. Catalysis Today, 2009, 147: S285-S289
[28]	Wang Y L, Liu Z Y, Zhan L A, Huang Z G, Liu Q Y, Ma J R. Performance of an activated carbon honeycomb supported V2O5 catalyst in simultaneous SO2 and NO removal [J]. Chemical Engineering Science, 2004, 59 (22/23): 5283-5290
[29]	Zhu Z P, Liu Z Y, Liu S J, Niu H X. Catalytic NO reduction with ammonia at low temperatures on V2O5/AC catalysts: effect of metal oxides addition and SO2 [J]. Applied Catalysis B-Environmental, 2001, 30 (3/4): 267-276
[30]	Guo Yanxia (郭彦霞), Liu Zhenyu (刘振宇), Liu Qingya (刘清雅), Sun Dekui (孙德魁). Mechanism of carbon burn-off on V2O5/AC for simultaneous SO2 and NO removal during regeneration in NH3 atmosphere [J]. Chinese Journal of Catalysis (催化学报), 2007, 28 (6): 514-520
[31]	Bao Y, Zhan L, Wang C X, Wang Y L, Yang G Z, Yang J H, Qiao W M, Ling L C. Synthesis of carbon nanofiber/carbon-foam composite for catalyst support in gas-phase catalytic reactions [J]. New Carbon Materials, 2011, 26: 341-346
[32]	Ogihara H, Takenaka S, Yamanaka I, Otsuka K. Reduction of NO with the carbon nanofibers formed by methane decomposition [J]. Carbon, 2004, 42: 1609-1617
[33]	Zhang D S, Zhang L, Shi L Y, Fang C, Li H R, Gao R H, Huang L, Zhang J P. In situ supported MnOx-CeOx on carbon nanotubes for the low-temperature selective catalytic reduction of NO with NH3 [J]. Nanoscale, 2013, 5: 1127-1136
[34]	Bai S L, Zhao J H, Wang L, Zhu Z P. SO2-promoted reduction of NO with NH3 over vanadium molecularly anchored on the surface of carbon nanotubes [J]. Catalysis Today, 2010, 158: 393-400
[35]	Bai S L, Zhao J H, Wang L, Zhu Z P. Study of low-temperature selective catalytic reduction of NO by ammonia over carbon-nanotube-supported vanadium [J]. J. Fuel Chem. Technol., 2009, 37: 583-587
[36]	Liu Z M, Woo S I. Recent advances in catalytic DeNOx science and technology [J]. Catalysis Reviews-Science and Engineering, 2006, 48 (1): 43-89
[37]	Kamasamudram K, Currier N W, Chen X, Yezerets A. Overview of the practically important behaviors of zeolite-based urea-SCR catalysts, using compact experimental protocol [J]. Catalysis Today, 2010, 151 (3/4): 212-222
[38]	Theinnoi K, Tsolakis A, Sitshebo S, Cracknell R F, Clark R H. Fuels combustion effects on a passive mode silver/alumina HC-SCR catalyst activity in reducing NOx [J]. Chemical Engineering Journal, 2010, 158 (3): 468-473
[39]	Rodriguez-Fernandez J, Tsolakis A, Ahmadinejad M, Sitshebo S. Investigation of the deactivation of a NOx-reducing hydrocarbon-selective catalytic reduction (HC-SCR) catalyst by thermogravimetric analysis: effect of the fuel and prototype catalyst [J]. Energy Fuels, 2010, 24 (2): 992-1000
[40]	Liu Z M, Oh K S, Woo S I. Overview on the selective lean NOx reduction by hydrocarbons over Pt-based catalysts [J]. Catalysis Surveys from Asia, 2006, 10 (1): 8-15
[41]	Roy S, Hegde M S, Madras G. Catalysis for NOx abatement [J]. Applied Energy, 2009, 86 (11): 2283-2297
[42]	Liu Z M, Li J H, Woo S I. Recent advances in the selective catalytic reduction of NOx by hydrogen in the presence of oxygen [J]. Energy Environ. Sci., 2012, 5: 8799-8814
[43]	Schill L, Putlurua S S R, Jacobsen C F, Hansen C H, Fehrmann, Jensen A D. Ethanol-selective catalytic reduction of NO by Ag/Al2O3 catalysts: activity and deactivation by alkali salts [J]. Applied Catalysis B: Environmental, 2012, 127: 323-329
[44]	Felix J D, Elliott E M, Shaw S L. Nitrogen isotopic composition of coal-fired power plant NOx: influence of emission controls and implications for global emission inventories [J]. Environ. Sci. Technol., 2012, 46: 3528-3535
[45]	Roy S, Baiker A. NOx storage-reduction catalysis: from mechanism and materials properties to storage-reduction performance [J]. Chemical Reviews, 2009, 109 (9): 4054-4091
[46]	Brandenberger S, Kröcher O, Tissler A, Althoff R. The state of the art in selective catalytic reduction of NOx by ammonia using metal-exchanged zeolite catalysts [J]. Catalysis Reviews-Science and Engineering, 2008, 50 (4): 492-531
[47]	Harding R H, Peters A W, Nee J R D. New developments in FCC catalyst technology [J]. Applied Catalysis A: General, 2001, 221 (1/2): 389-396
[48]	Chen Junwu(陈俊武). Fluid Catalytic Cracking Process and Engineering (催化裂化工艺与工程) [M]. Beijing: China Petrochemical Press, 2005: 1234
[49]	Furimsky E, Siukola A, Turenne A. Effect of temperature and O2 concentration on N-containing emissions during oxidative regeneration of hydroprocessing catalysts [J]. Industrial & Engineering Chemistry Research, 1996, 35 (12): 4406-4411
[50]	Furimsky E, Nielsen M, Jurasek P. Formation of nitrogen-compounds from nitrogen-containing rings during oxidative regeneration of spent hydroprocessing catalysts [J]. Energy & Fuels, 1995, 9 (3): 439-447
[51]	Dishman K L, Doolin P K, Tullock, L D. NOx emissions in fluid catalytic cracking catalyst regeneration [J]. Industrial & Engineering Chemistry Research, 1998, 37 (12): 4631-4636
[52]	Cerqueira H S, Caeiro G, Costa L, Ribeiro F R. Deactivation of FCC catalysts [J]. Journal of Molecular Catalysis A-Chemical, 2008, 292 (1/2): 1-13
[53]	Zhao Q S, Xiang J, Shi J M, Yin Q D, Hu S, Sun L S. Selective catalystic reduction of NO by NH3 over sol-gel-derived CuO/gamma-Al2O3 catalyst//Proceedings of the 6th International Symposium on Coal Combustion[C]. 2007: 322-328
[54]	Zhang C B, He H, Yu Y B, Zhang R D. Research of selective catalystic reduction of NO with propene over catalyst Cu/Al2O3 in excess oxygen [J]. Chemical Journal of Chinese Universities, 2004, 25 (1): 136-139
[55]	Jagtap N, Umbarkar S B, Miquel P, Granger P, Dongare M K. Support modification to improve the sulphur tolerance of Ag/Al2O3 for SCR of NOx with propene under lean-burn conditions [J]. Applied Catalysis B-Environmental, 2009, 90 (3/4): 416-425
[56]	Vernoux P, Gaillard F Karoum R, Billard A. Reduction of nitrogen oxides over Ir/YSZ electrochemical catalysts [J]. Applied Catalysis B-Environmental, 2007, 73 (1/2): 73-83
[57]	Zhang R D, Villanueva A, Alamdari H S, Kaliaguine S. Catalytic reduction of NO by propene over LaCo1-xCuxO3 perovskites synthesized by reactive grinding [J]. Applied Catalysis B-Environmental, 2006, 64 (3/4): 220-233
[58]	Shimizu K, Higashimata T, Tsuzuki M, Satsuma A. Effect of hydrogen addition on SO2 tolerance of silver-alumina for SCR of NO with propane [J]. Journal of Catalysis, 2006, 239 (1): 117-124
[59]	Houel V, James D, Millington P, Pollington S, Poulston S, Rajaram R, Torbati R. A comparison of the activity and deactivation of Ag/Al2O3 and Cu/ZSM-5 for HC-SCR under simulated diesel exhaust emission conditions [J]. Journal of Catalysis, 2005, 230 (1): 150-157
[60]	Efthimiadis E A, Christoforou S C, Nikolopoulos A A, Vasalos I A. Selective catalytic reduction of NO with C3H6 over Rh alumina in the presence and absence of SO2 in the feed [J]. Applied Catalysis B-Environmental, 1999, 22 (2): 91-106
[61]	Corma A, Palomares A E, Rey F, Marquez F. Simultaneous catalytic removal of SOx and NOx with hydrotalcite-derived mixed oxides containing copper, and their possibilities to be used in FCC units [J]. Journal of Catalysis, 1997, 170 (1): 140-149
[62]	Wen B. NOx, SOx and CO catalytic removal from FCC regenerator[J]. Abstracts of Papers of the American Chemical Society, 2002, 223: U532-U532
[63]	Wen B, He M Y. Study of the Cu-Ce synergism for NO reduction with CO in the presence of O2, H2O and SO2 in FCC operation [J]. Applied Catalysis B-Environmental, 2002, 37 (1): 75-82
[64]	Wen B, He M Y, Costello C. Simultaneous catalytic removal of NOx, SOx, and CO from FCC regenerator [J]. Energy & Fuels, 2002, 16 (5): 1048-1053
[65]	Wen B, He M Y, Schrum E, Li C. NO reduction and CO oxidation over Cu/Ce/Mg/Al mixed oxide catalyst in FCC operation [J]. Journal of Molecular Catalysis A-Chemical, 2002, 180 (1/2): 187-192
[66]	Iliopoulou E F, Efthimiadis E A, Lappas A A, Iatridis D K, Vasalos I A. Development and evaluation of Ir-based catalytic additives for the reduction of NO emissions from the regenerator of a fluid catalytic cracking unit [J]. Industrial & Engineering Chemistry Research, 2004, 43 (23): 7476-7483
[67]	Iliopoulou E F, Efthimiadis E A, Lappas A A, Vasalos I A. Effect of Ru-based catalytic additives on NO and CO formed during regeneration of spent FCC catalyst [J]. Industrial & Engineering Chemistry Research, 2005, 44 (14): 4922-4930
[68]	Iliopoulou E F, Efthimiadis E A, Nalbandian L, Vasalos I A, Barth J O, Lercher J A. Ir-based additives for NO reduction and CO oxidation in the FCC regenerator: evaluation, characterization and mechanistic studies [J]. Applied Catalysis B-Environmental, 2005, 60 (3/4): 277-288
[69]	Iliopoulou E F, Efthimiadis E A, Vasalos I A. Ag-based catalytic additives for the simultaneous reduction of NO and CO emissions from the regenerator of a FCC unit [J]. Industrial & Engineering Chemistry Research, 2004, 43 (6): 1388-1394
[70]	Iliopoulou E F, Efthimiadis E A, Vasalos I A, Barth J O, Lercher J A. Effect of Rh-based additives on NO and CO formed during regeneration of spent FCC catalyst [J]. Applied Catalysis B-Environmental, 2004, 47 (3): 165-175
[71]	Iliopoulou E F, Evdou A P, Lemonidou A A, Vasalos I A. Ag/alumina catalysts for the selective catalytic reduction of NOx using various reductants [J]. Applied Catalysis A-General, 2004, 274 (1/2): 179-189
[72]	Chen Yanguang (陈彦广), Lu Jia (陆佳), Han Hongjing (韩洪晶), Liu Shuzhi (刘淑芝), Wang Baohui (王宝辉). Advances in technologies for NOx reduction during the regeneration process of FCC [J]. Chemistry Online (化学通报), 2013, 76 (4): 326-331
[73]	Barth J O, Jentys A, Iliopoulou E F, Vasalos I A, Lercher J A. Novel derivatives of MCM-36 as catalysts for the reduction of nitrogen oxides from FCC regenerator flue gas streams [J]. Journal of Catalysis, 2004, 227 (1): 117-129
[74]	Mann R. Fluid catalytic cracking—some recent developments in catalyst particle design and unit hardware [J]. Catalysis Today, 1993, 18 (4): 509-528
[75]	Burch R, St Clair Brown A, Nee J R, Harding R H, Nee J, Harding R. Composition, useful in fluidized catalytic cracking process as part of catalyst, comprises acidic oxide support and transition metal from Group VIII of periodic table [P]: WO, 2005007779-A1; EP, 1654339-A1; RU, 2352609-C2. 2005
[76]	Miller R B, Johnson T E, Santner C R, Avidan A A. Comparison of one-stage and two-stage regenerators (AM-96-48)//NPRA Ann Mtg [C]. 1996
[77]	Zhou Rujin (周如金), Wei Fei (魏飞). Fundamental research and application prospects of the quick-contact reactor [J]. Petrochemical Technology (石化技术), 2000, 7 ( 2): 109-111
[78]	Qian Weizhong (骞伟中), Wei Fei (魏飞), Wang Yao (王垚), Luo Guohua (罗国华), Jin Yong (金涌), Wang Zhanwen (汪展文). Application of multistage fluidized bed in heterogeneous catalysis and nano-material synthesis [J]. CIESC Journal (化工学报), 2010, 61 (9): 2186-2190
[79]	Feng Qiyao (冯琦遥), Luo Guohua (罗国华), Wei Fei (魏飞). Production of acrylic acid via catalytic partial oxidation of propylene in a two-stage fluidized bed [J]. The Chinese Journal of Process Engineering (过程工程学报), 2008, 8 (1): 83-87
[80]	Qian Weizhong (骞伟中), Luo Yun (罗云), Wei Fei (魏飞), Zheng Chunning (郑春宁), Luo Guohua (罗国华), Sun Yonggui (孙永贵), Shi Haibo (师海波), Zhang Lei (张磊), Wei Xiaobo (魏小波), Yan Hua (颜华), Wu Min (吴敏), Lu Wei (卢巍). A multi-staged fluidized reactor and its method for synthesis of vinyl chloride [P]: CN, 1958146. 2007-05-09
[81]	Qian Zhen (钱震), Wei Fei (魏飞), Zhang Minghui (张明辉), Gao Lei (高雷), Wang Zhanwen (汪展文), Jin Yong (金涌). A fast fluidized bed reactor to realize particles and gas countercurrent contact [P]: CN, 1546218. 2004-11-17
[82]	Jiang Xiumin (姜秀民), Liu Hui (刘辉),Yan Che (闫澈), Han Xiangxin (韩向新), Zheng Chuguang (郑楚光), Liu Dechang (刘德昌). NOx and SO2 emission and combustion characteristics of super fine pulverized coal particle [J]. Journal of Chemical Industry and Engineering (China) (化工学报), 2004, 55 (6): 783-787
[83]	Li Zhiqiang (李志强), Wei Fei (魏飞), Jin Yong (金涌), Li Rongxian (李荣先), Zhou Lixing (周力行). NOx formation in swirl coal burner with pulverized coal concentrator [J]. Journal of Chemical Industry and Engineering (China) (化工学报), 2003, 54 (4): 564-569
[84]	Wei Fei (魏飞), Luo Guohua (罗国华), Li Jun (李军). A low NOx emission FCC regenerator and regeneration process [P]: CN, 201010505630.6. 2010-10-13
[85]	Li J, Luo G H, Wei F. A multistage NOx reduction process for a FCC regenerator [J]. Chemical Engineering Journal, 2011, 173 (2): 296-302
[86]	Li Jun (李军). NOx reduction in fluid catalytic cracking regenerator and application of the fluidized bed [D]. Beijing: Tsinghua University, 2011
[87]	Peters A W, Ualuris G, Weatherbee G W, Zhao X J. Origin and control of NOx in the FCCU regenerator [J]. Fluid Cracking Catalysts, 1998, 74: 259-278
[88]	Cheng W C, Kim G, Peters A W, Zhao X, Rajagopalan K. Environmental fluid catalytic cracking technology [J]. Catalysis Reviews—Science and Engineering, 1998, 40: 39-79
[89]	Babich I V, Seshan K, Lefferts L. Nature of nitrogen specie in coke and their role in NOx formation during FCC catalyst regeneration [J]. Applied Catalysis B-Environmental, 2005, 59: 205-211
[90]	Li J, Luo G H, Chu Y, Wei F. Experimental and modeling analysis of NO reduction by CO for a FCC regeneration process [J]. Chemical Engineering Journal, 2012, 184: 168-175
[91]	Li J, Luo G H, Wei F. NO Reduction by CO over a Fe-based catalyst in FCC regenerator conditions [J]. Chemical Engineering Journal, 10.1016/j.cej.2014.06.015
[92]	Sun D K, Liu Z Y, Gui G Q, Huang Z G, Liu Q Y, Xiao Y. Reaction of NO and NO2 with NH3 over V2O5/AC Catalyst [J]. Chinese Journal of Catalysis, 2010, 31: 56-60