Abstract
The oxidation kinetics, surface morphology and phase structure of oxide films grown on 25Cr20Ni alloy in air-H2O and H2-H2O atmospheres at 900 °C for 20 h were investigated. The anti-coking performance and resistance to carburization of the two oxide films were compared using 25Cr20Ni alloy tubes with an inner diameter of 10 mm and a length of 850 mm in a bench scale naphtha steam pyrolysis unit. The oxidation kinetics followed a parabolic law in an air-H2O atmosphere and a logarithm law in a H2-H20 atmosphere in the steady-state stage. The oxide film grown in the air-H2O atmosphere had cracks where the elements Fe and Ni were enriched and the un-cracked area was covered with octahedral-shaped MnCr2O4 spinels and Cr1,3Fe0.7O3 oxide clusters, while the oxide film grown in the H2-H2O atmosphere was intact and completely covered with dense standing blade MnCr2O4 spinels. In the pyrolysis tests, the anti-coking performance and resistance to carburization of the oxide film grown in the H2-H2O atmosphere were far better than that in the air-H20 atmosphere. The mass of coke formed in the oxide film grown in the H2-H2O atmosphere was less than 10% of that in the air-H2O atmosphere. The Cr1.3Fe0.7O3 oxide clusters converted into Cr23C6 carbides and the cracks were filled with carbon in the oxide film grown in the air-H2O atmosphere after repeated coking and decoking tests, while the dense standing blade MnCr2O4 spinels remained unchanged in the oxide film grown in the H2-H2O atmosphere. The ethylene, propylene and butadiene yields in the pyrolysis tests were almost the same for the two oxide films.
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References
Albright L F and Marek J C. Mechanistic model for formation of coke in pyrolysis units producing ethylene. Industrial and Engineering Chemistry Research. 1988. 27(5): 755–759, 10.1021/ie00077a006
Baker R T K, Gadsby G R, Thomas R B, et al. The production and properties of filamentous carbon. Carbon. 1975. 13(3): 211–214, 10.1016/0008-6223(75)90234-1
Baker R T K. Catalytic growth of carbon filaments. Carbon. 1989. 27(3): 315–323, 10.1016/0008-6223(89)90062-6
Benum L W and Oballa M C. Process of treating a stainless steel matrix. US Patent 6436202. 2002-08-20
Benum L W, Oballa M C and Petrone S S A. Surface on a stainless steel matrix. US Patent 6824883. 2004-11-30
Benum L W, Oballa M C and Petrone S S A. Surface on a stainless steel matrix. US Patent 7488392. 2009-02-10
Bonnet F, Ropital F, Berthier Y, et al. Filamentous carbon formation caused by catalytic metal particles from iron oxide. Materials and Corrosion. 2003. 54(11): 870–880, 10.1002/maco.200303742
Cai H Y, Krzywicki A and Oballa M C. Coke formation in steam crackers for ethylene production. Chemical Engineering and Processing. 2002. 41(3):199–214, 10.1016/S0255-2701(01)00135-0
Deng W, Feng X J and Shi W Z. Studies of mechanism of coke formation during the pyrolysis of hydrocarbon. Shenyang Chemical Industry. 2000. 29(1): 23–26 (in Chinese)
Fisher G A, Prescott R, Chen Y, et al. Coating system for high temperature stainless steel. US Patent 6585864. 2003-06-01
Hammer J, Laney S, Jackson R, et al. The oxidation of ferritic stainless steels in simulated solid-oxide fuel-cell atmospheres. Oxidation of Metals. 2007. 67(1): 1–38, 10.1007/s11085-006-9041-y
Hänsel M, Quadakkers W J and Young D J. Role of water vapor in chromia-scale growth at low oxygen partial pressure. Oxidation of Metals. 2003. 59(3–4): 285–301, 10.1023/A:1023040010859
Hua B, Lu F, Zhang J, et al. Oxidation behavior and electrical property of a Ni-based alloy in SOFC anode environment. Journal of the Electrochemical Society. 2009. 156(10): 1261–1266, 10.1149/1.3194788
Kofstad P. High Temperature Corrosion. London and New York: Elsevier Applied Science Press. 1988. 148
Li C S, Yu L and Yang Y S. Coking behavior of three kinds of metals and their oxide films during thermal pyrolysis reaction of hydrocarbons. Journal of Chinese Society for Corrosion and Protection. 2001. 21(3): 158–166 (in Chinese)
Li H, Zheng Y J, Benum L W, et al. Carburization behaviour of Mn-Cr-O spinel in high temperature hydrocarbon pyrolysis environment. Corrosion Science. 2009. 51(10): 2336–2341, 10.1016/j.corsci.2009.06.006
Li T F. Metal High Temperature Oxidation and Hot Corrosion. Beijing: Chemical Industry Press. 2003. 53-61 (in Chinese)
Lobnig R E, Hennesen K, Grabke H J, et al. Diffusion of cations in chromia layers grown on iron-base alloys. Oxidation of Metals. 1992. 37(1–2): 81–93, 10.1007/BF00665632
Manafzadeh H, Sadrameli S M and Towfighi J. Coke deposition by physical condensation of poly-cyclic hydrocarbons in the transfer line exchanger (TLX) of olefin plant. Applied Thermal Engineering. 2003. 23(11): 1347–1358, 10.1016/S1359-4311(03)00088-7
Mott N F and Gurney R W. Electronic Process in Ionic Crystals. New York: Oxford University Press. 1940
Polman E A, Fransen T and Gellings P J. Oxidation kinetics of chromium and morphological phenomena. Oxidation of Metals. 1989. 32(5–6): 433–447,10.1007/BF00665448
Povoden E, Grundy A N and Gauckler L J. Thermodynamic assessment of the Mn-Cr-O system for solid oxide fuel cell (SOFC) materials. International Journal of Materials Research. 2006. 97(5): 569–578
Raynaud G M and Rapp R A. In situ observation of whiskers, pyramids and pits during the high-temperature oxidation of metals. Oxidation of Metals. 1984. 21(1): 89–102, 10.1007/BF00659470
Susan D, Van Den Avyle J, Monroe S, et al. The effects of pre-oxidation and alloy chemistry of austenitic stainless steels on glass/metal sealing. Oxidation of Metals. 2009. 73(1): 311–335
Towfighi J, Sadrameli M and Niaei A. Coke formation mechanisms and coke inhibiting methods in pyrolysis furnaces. Journal of Chemical Engineering of Japan. 2002. 35(10): 923–937, 10.1252/jcej.35.923
Wynns K A and Bayer G T. Surface alloy system conversion for high temperature applications. US Patent 6537388. 2003-03-25
Zhou J X, Xu H, Luan X J, et al. Influence of the SiO2/S coating and sulfur/phosphorus-containing coking inhibitor on coke formation during thermal pyrolysis of light naphtha. Fuel Processing Technology. 2012. 104:198–203, 10.1016/j.fuproc.2012.05.015
Zurek J, Young D J, Essuman E, et al. Growth and adherence of chromia based surface scales on Ni-base alloys in high-and low-pO2 gases. Materials Science and Engineering A. 2008. 477(1–2): 259–270, 10.1016/j.msea.2007.05.035
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Wang, S., Cui, L., Wang, G. et al. Properties of oxide films grown on 25Cr20Ni alloy in air-H2O and H2-H2O atmospheres. Pet. Sci. 11, 147–154 (2014). https://doi.org/10.1007/s12182-014-0326-5
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DOI: https://doi.org/10.1007/s12182-014-0326-5