بررسی تبلور ترکیب های پارافینی در جریان نفت مدل در لوله سرد

نوع مقاله: کوتاه پژوهشی

نویسندگان

تهران، دانشگاه تربیت مدرس، دانشکده مهندسی شیمی

چکیده

انتقال نفت واکس دار از نقاط سرد سبب کاهش حلالیت ترکیبات پارافینی در نفت و رسوب آنها بر دیواره لوله می‌شود. با بررسی ساختار رسوب، می‌ توان فرایند سخت شدن رسوب را بررسی نمود. بررسی ساختار رسوب در لوله نشان دادکه بلورها با رشد لایه رسوب، از ساختار صفحه‌ای به ناقص و گویچه‌ای تغییر شکل می‌یابد. با مشاهده ‌های انجام شده نسبت ابعادی بلورها در معادله پیش بینی نفوذپذیری رسوب تصحیح شد.  

کلیدواژه‌ها

موضوعات


[1] Hernandez O.C., Hensley H, Sarica C. Improvements in Single-Phase Paraffin Deposition Modeling, SPE Journal, 25, p. 237 (2004).

[2] Lund H.J., Thesis M.S, The University of Tulsa, Investigation of Paraffin Deposition During Single Phase Flow, (1998).

[3] Singh P., Venkatesan R., Fogler H.S., Morphological Evolution of Thick Wax Deposits during Aging, AICHE Journal, 47, p. 6 (2001).

[4] Paso K.G., Fogler H.S., Influence of n-Paraffin Composition on the Aging of Wax-Oil Gel Deposits, AIChE Journal, 49, p. 3241 (2003).

[5] Venkatesan R., Nagarajan N.R., Paso. K., Yi. Y.B., Sastry A.M., Fogler H.S., The Strength of Paraffin Gels Formed under Static and Flow Conditions, Chemical Engineering Science, 60, p. 3587 (2005).

[6] Lee H., Venkatesan R., Fogler HS. Development of a Wax Deposition Model Based on Combined Convective Heat and Mass Transfer Analysis under Turbulent Conditions, "The 8th International Conference on Petroleum Phase Behavior and Fouling", (2007).

[7] Holder G.A., Winkler J, Wax Crystalization from Distillate Fuels: Cloud and Pour Phenomena Exhibited by Solutions of Binary n-Paraffin Mixtures, Industrial Petroleum, 51, p. 228 (1965).

[8] Ferris S.W., Cowles H.C., Crystal Behavior Of Paraffin Wax, Industrial And Engineering Chemistry, 37, p. 1054 (1964).

[9] Chang Ch, Boger D V, Nguyen Q D. Influence of Thermal History on the Waxy Structure of Statically Cooled Waxy Crude Oil, SPE Journal, 5, p. 148 (2000).

[10] Chichakli M.Crystal Morphology in Hydrocarbon Systems, Industrial and Engineering Chemistry, 59, p. 86 (1967).

[11] Kane M, Djabourova M, Volle J., Morphology of Paraffin Crystals in Waxy Crude Oils Cooled in Quiescent Conditions and under Flow, Fuel, 82, p. 127 (2003).

[12] Lu X., Langton M., Olofsson P., Wax Morphology In Bitumen, Journal Of Materials Science, 40, p. 1893 (2005).

[13] Edwards R.T., Crystal Habit of Paraffin Wax, Industrial Engineering Chemistry, 49, p. 750 (1957).

[14] Imai T., Nakamura K., Shibata M., Relationship between the Hardness of an Oil-Wax Gel and the Surface Structure of the Wax Crystals, Colloids Surface, A 19, p. 233 (2001).

[15] Clarke E., Crystal Types of Pure Hydrocarbons in the Paraffin Wax Range, Industrial Engineering Chemistry, 43, p. 2526 (1951).

[16] Hansen A.B., Larson E., Pedersen W.B., Nielsen A.B., Ronningsen H.P., Wax Precipitation from North Sea Crude Oils. 3. Precipitation and Dissolution of Wax Studied by Differential Scanning Calorimetry, Energy & Fuels, 5, p. 914 (1991).

[17] Le´toffe´ JM., C.P., Garcin M., Volle JL, Crude Oils: Characterization of Waxes Precipitated on Cooling by D.S.C. and Thermo-microscopy, Fuel, 74, p. 810 (1995).

[18] Srivastava S.P., Handoo J., Agrawal K.M., Joshi G.C., Phase-Transition Studies in n-Alkanes and Petroleum Related Waxes: A Review, Phys. Chem. Solids, 54, p. 639 (1993).

[19] Katz,J., The Crystalization of Paraffin Wax Part 2, Industrial Petroleum Technology, 18, p. 37 (1932).

[20] Marek Zbik, Roger G. Horna, Neil Shaw, AFM Study of Paraffin Wax Surfaces Colloids and Surfaces A: Physicochemcal Engineering Aspects, 287, p. 139 (2006).

[21] Plomp M., Enckevort W.J.P. van, Hoof, P.J.C.M. van, Streek C.J. van de Morphology of and Dislocation Movement in n-C40H82 Paraffin Crystals Grown from Solution Crystals, Journal of Crystal Growth, 249, p. 600 (2003).

[22] Bhat N.V., Mehrotra AK.Measurement and Prediction of the Phase Behavior of Wax-Solvent Mixtures: Significance of the Wax Disappearance Temperature, Industrial Engineering Chemistry Research, 43, p. 3451 (2004).

[23] Lopes-da-Silva J.A., Coutinho A.P., Analysis of the Isothermal Structure Development in Waxy Crude Oils under Quiescent Conditions, Energy & Fuels, 21, p. 3612 (2007).

[24] Falla W.R., Mulski M., Cussler E.L., Estimating Diffusion Through Flake-Filled Membranes, Journal of Membrane Science, 119, p. 129 (1996).