主动冷却通道内吸热型碳氢燃料热裂解结焦抑制机理

推进技术 ›› 2013, Vol. 34 ›› Issue (12): 1713-1718.

主动冷却通道内吸热型碳氢燃料热裂解结焦抑制机理

张强强¹, 汪旭清¹, 刘国柱¹, 张香文¹, 胡申林², 马雪松²

天津大学化工学院/先进燃料与化学推进剂教育部重点实验室,天津 300072;天津大学化工学院/先进燃料与化学推进剂教育部重点实验室,天津 300072;天津大学化工学院/先进燃料与化学推进剂教育部重点实验室,天津 300072;天津大学化工学院/先进燃料与化学推进剂教育部重点实验室,天津 300072;北京动力机械研究所高超声速冲压发动机技术重点实验室,北京 100074;北京动力机械研究所高超声速冲压发动机技术重点实验室,北京 100074

发布日期:2021-08-15
作者简介:张强强(1988—),男,硕士生,研究领域为碳氢燃料热裂解结焦抑制技术。E-mail:zhangqq72270@163.com通讯作者 :刘国柱(1979—),男,硕士生导师,副教授,研究领域为航空航天先进碳氢燃料。E-mail:gliu@tju.edu.cn
基金资助:
国家自然科学基金重大研究计划(91116001)。

Inhibition Mechanism of Pyrolytic Cokes from Endothermic Hydrocarbon Fuels in Regenerative Cooling Channels

Key Laboratory for Advanced Fuel and Chemical Propellant of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;Key Laboratory for Advanced Fuel and Chemical Propellant of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;Key Laboratory for Advanced Fuel and Chemical Propellant of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;Key Laboratory for Advanced Fuel and Chemical Propellant of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;Science and Technology on Scramjet Laboratory,Beijing Power Machinery Institute, Beijing 100074, China;Science and Technology on Scramjet Laboratory,Beijing Power Machinery Institute, Beijing 100074, China

Published:2021-08-15

摘要/Abstract

摘要： 为阐明超临界条件下吸热型碳氢燃料的热裂解结焦抑制机理,在电加热管实验装置上,获得了沿程油温、壁温以及燃料的组成,分析了结焦抑制添加剂影响碳氢燃料高温裂解和结焦的实验数据。结果表明:结焦抑制添加剂对碳氢燃料的裂解影响小于4%,降低结焦量约30%；添加结焦抑制剂后,结焦速率下降较快,稳定结焦速率降低约2%。采用SEM表征结焦抑制添加剂对结焦形貌的影响。结果表明,添加剂同时抑制了表面催化结焦与自由基生长结焦的形成。 

关键词: 吸热燃料;热裂解;超临界;结焦抑制;添加剂 

Abstract: To illuminate inhibition mechanism of pyrolytic cokes from endothermic hydrocarbon under supercritical conditions, the effects of coke- inhibiting additive on fuel cracking and formation of cokes were experimentally investigated by using electrically heated tube test and measuring the amount of cokes deposited on the wall at different time-on-stream(TOS=0~20min). More information on the chemical compositions, temperatures of wall and cracked fuel along the tube were also provided. Adding coke-inhibiting additive decreases the cracking conversion by 4%, however, significantly reduces the amount of coking deposit by about 30%. After adding coke-inhibiting additive, the rate of coking formation drops faster and becomes about 2% lower. The characterization of carbon deposits morphologies by SEM shows that cokes formed through both surface catalysis and radical-growth mechanism are inhibited to some extent in the presence of coke-inhibiting additives. 

Key words: Endothermic fuel; Thermal cracking; Supercritical; Coking inhibition; Additive

张强强,汪旭清,刘国柱,张香文,胡申林,马雪松. 主动冷却通道内吸热型碳氢燃料热裂解结焦抑制机理[J]. 推进技术, 2013, 34(12): 1713-1718.

ZHANG Qiang-qiang¹, WANG Xu-qing¹, LIU Guo-zhu¹, ZHANG Xiang-wen¹, HU Shen-lin², MA Xue-song². Inhibition Mechanism of Pyrolytic Cokes from Endothermic Hydrocarbon Fuels in Regenerative Cooling Channels[J]. Journal of Propulsion Technology, 2013, 34(12): 1713-1718.

参考文献

[1] 刘世俭, 刘兴洲.超燃冲压发动机可贮存碳氢燃料再生主动冷却换热过程分析[J].飞航导弹, 2009,3.
[2] Edwards T.Cracking and Deposition Behavior of Supercritical Hydrocarbon Aviation fuels[J].Combustion Science and Technology, 2006,8(1-3):307-334.
[3] 郭永胜, 林瑞森.吸热型碳氢燃料的结焦研究(I)含硫抑制剂[J].燃料化学学报, 2005,3(3):289-292.
[4] Edwards T.Liquid Fuels and Propellants for Aerospace Propulsion:1903-2003[J].Journal of Propulsion and Power, 2003,9(6):1089-1107.
[5] 谢文杰, 方文军, 李丹.超临界条件下正庚烷的裂解与结焦[J].化学学报, 2009,7(15):1759-1764.
[6] Liu G, Wang X, Zhang X.Pyrolytic Depositions of Hydrocarbon Aviation Fuels in Regenerative Cooling Channels[J].Journal of Analytical and Applied Pyrolysis,First Published,2013.
[7] 郭永胜, 方文军, 林瑞森.吸热型碳氢燃料热裂解的结焦抑制[J].浙江大学学报 (工学版), 2005,9(4):538-541.
[8] Guo W, Zhang X, Liu G, et al.Roles of Hydrogen Donors and Organic Selenides in Inhibiting Solid Deposits from Thermal Stressing of n-Dodecane and Chinese RP-3Jet Fuel[J].Industrial & Engineering Chemistry Research, 2009,8(18):8320-8327.
[9] Jiang R, Liu G, Zhang X.Thermal Cracking of Hydrocarbon Aviation Fuels in Regenerative Cooling Microchannels[J].Energy & Fuels, 2013,7(5):2563-2577.
[10] Jiang R, Liu G, You Z, et al.On the Critical Points of Thermally Cracked Hydrocarbon Fuels under High Pressure[J].Industrial & Engineering Chemistry Research, 2011,0(15):9456-9465.
[11] Li X F, Zhong F Q, Fan X J, et al.Study of Turbulent Heat Transfer of Aviation Kerosene Flows in a Curved Pipe at Supercritical Pressure[J].Applied Thermal Engineering, 2010,0(13):1845-1851.
[12] Shah Y T, Stuart E B, Sheth K D.Coke Formation during Thermal Cracking of n-Octane[J].Industrial & Engineering Chemistry Process Design and Development, 1976,5(4):518-524.
[13] Sundaram K M, Van Damme P S, Froment G F.Coke Deposition in the Thermal Cracking of Ethane[J].AIChE Journal, 1981,7(6):946-951.
[14] Zou R, Lou Q, Mo S, et al.Study on a Kinetic Model of Atmospheric Gas Oil Pyrolysis and Coke Deposition[J].Industrial & Engineering Chemistry Research, 1993,2(5):843-847.
[15] Jiang R, Liu G, He X, et al.Supercritical Thermal Decompositions of Normal- and Iso-Dodecane in Tubular Reactor[J].Journal of Analytical and Applied Pyrolysis, 2011,2(2):292-306.
[16] Wickham D T, Engel J R, Karpuk M E.Additives to Prevent Filamentous Coke Formation in Endothermic Heat Exchangers[J].Preprints-American Chemical Society.Division of Petroleum Chemistry, 2000,5(3):459-464.