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Isothermal Crystallization Properties and Improved Rheological Performance of Waxy Crude Oil using Polyoctadecylacrylate-Modified Montmorillonite Composite as a Pour Point Depressant

Published online by Cambridge University Press:  01 January 2024

Bo Yao ,
Chuanxian Li ,
Fei Yang  and
Guangyu Sun
Bo Yao
Affiliation:
College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, Shandong 266580, P.R.C. Shandong Provincial Key Laboratory of Oil & Gas Storage and Transportation Safety, Qingdao, Shandong 266580, P.R.C.
Chuanxian Li
Affiliation:
College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, Shandong 266580, P.R.C. Shandong Provincial Key Laboratory of Oil & Gas Storage and Transportation Safety, Qingdao, Shandong 266580, P.R.C.
Fei Yang*
Affiliation:
College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, Shandong 266580, P.R.C. Shandong Provincial Key Laboratory of Oil & Gas Storage and Transportation Safety, Qingdao, Shandong 266580, P.R.C.
Guangyu Sun
Affiliation:
College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao, Shandong 266580, P.R.C. Shandong Provincial Key Laboratory of Oil & Gas Storage and Transportation Safety, Qingdao, Shandong 266580, P.R.C.
*
*E-mail address of corresponding author: [email protected]
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Abstract

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Recently, studies on the use of polymer nanomaterial composites as pour-point depressants (PPD) have drawn much attention, but the crystallization properties and improved rheological performance of waxy crude oils using nanoclay-based composite PPDs have rarely been reported. In this paper, montmorillonite (Mnt) was first organically modified using octadecyltrimethylammonium chloride (C21H46NCl, or stearyltrimethylammonium chloride) in aqueous solution. Then, the organically modified Mnt (OMnt) material was dispersed into a polyoctadecylacrylate (POA) matrix to prepare a POA/OMnt composite PPD by melt blending. The composition, structure, and morphology of Mnt, OMnt, and the POA/OMnt composite PPDs were investigated. The results showed that the OMnt and POA were compatible and that the OMnt was exfoliated into several sheets in the POA matrix. Subsequently, the isothermal crystallization kinetics of the POA/OMnt composite PPDs showed that small amounts of OMnt had a dramatic impact on POA chain motion during crystallization and facilitated POA crystallization. After it was added to a waxy crude oil, the POA/OMnt composite PPDs produced better rheological properties and performance than identical concentrations of the neat POA. The POA/OMnt composite PPDs can act as wax nucleation sites for wax molecule precipitation and result in larger and more compact wax crystal flocs, which adversely affect the formation of a wax crystal network and, thus, favor the improvement of waxy crude oil rheology.

Keywords

Isothermal Crystallization KineticsNanocomposite Pour Point DepressantOrganically Modified MontmorilloniteWaxy Crude Oil
Type
Article
Information
Clays and Clay Minerals , Volume 66 , Issue 3 , June 2018 , pp. 233 - 244
Copyright
Copyright © Clay Minerals Society 2018

References

Al-Sabagh, A.M. Betiha, M.A. Osman, D.I. Hashim, A.I. El-Sukkary, M.M. and Mahmoud, T., 2016 A new covalent strategy for functionalized montmorillonite—poly (methyl methacrylate) for improving the flowability of crude oil RSC Advances 6 109460–109472.CrossRefGoogle Scholar
Avrami, M., 1940 Kinetics of phase change I I Transformation-time relations for random distribution of nuclei. The Journal of Chemical Physics 8 212–224.Google Scholar
Chen, Q. Zhu, R. Ma, L. Zhou, Q. Zhu, J. and He, H., 2017 Influence of interlayer species on the thermal characteristics of montmorillonite Applied Clay Science 135 129–135.CrossRefGoogle Scholar
He, H. Ding, Z. Zhu, J. Yuan, P. Xi, Y. Yang, D. and Frost, R.L., 2005 Thermal characterization of surfactant-modified montmorillonites Clays and Clay Minerals 53 287–293.CrossRefGoogle Scholar
Khajehpour, M. Gelves, G.A. and Sundaraj, U., 2015 Modification of montmorillonite with alkyl silanes and fluorosurfactant for clay/fluoroelastomer (FKM) nanocomposites Clays and Clay Minerals 63 1–14.CrossRefGoogle Scholar
Lashkarbolooki, M. Seyfaee, A. Esmaeilzadeh, F. and Mowla, D., 2010 Experimental investigation of wax deposition in Kermanshah crude oil through a monitored flow loop apparatus Energy & Fuels 24 1234–1241.CrossRefGoogle Scholar
Li, L. Bellan, L.M. Craighead, H.G. and Frey, M.W., 2006 Formation and properties of nylon-6 and nylon-6/montmorillonite composite nanofibers Polymer 247 6208–6217.CrossRefGoogle Scholar
Liu, C.P. Song, W.F. Lu, Q.X. and Chen, M.F., 2014 Comparison of isothermal with nonisothermal kinetics for ethylene-vinyl acetate cross-linking reaction in the solid state Industrial & Engineering Chemistry Research 53 10080–10089.CrossRefGoogle Scholar
Oliveira, L.M. Nunes, R.C. Melo, I.C. Ribeiro, Y.L. Reis, L.G. Dias, J.C. Guimarães, R.C.L. and Lucas, E.F., 2016 Evaluation of the correlation between wax type and structure/behavior of the pour point depressant Fuel Processing Technology 149 268–274.CrossRefGoogle Scholar
Page, K.A. and Adachi, K., 2006 Dielectric relaxation in montmorillonite/polymer nanocomposites Polymer 47 6406–6413.CrossRefGoogle Scholar
Sadek, E.M. El-Nashar, D.E. and Ahmed, S.M., 2015 Effect of organoclay reinforcement on the curing characteristics and technological properties of styrene-butadiene rubber Polymer Composites 36 1293–1302.CrossRefGoogle Scholar
Shi, N. and Dou, Q., 2015 Non-isothermal cold crystallization kinetics of poly (lactic acid)/poly (butylene adipate-coterephthalate)/treated calcium carbonate composites Journal of Thermal Analysis and Calorimetry 119 635–642.CrossRefGoogle Scholar
Shirdel Ghadikolaei, S. Omrani, A. and Ehsani, M., 2016 Impact of bacterial cellulose nanofibers on the nonisothermal crystallization kinetics of ethylene-vinyl acetate copolymer Industrial & Engineering Chemistry Research 55 8248–8257.CrossRefGoogle Scholar
Wang, H.R. Gao, Y.L. Ye, Y.F. Min, G.H. Chen, Y. and Teng, X.Y., 2003 Crystallization kinetics of an amorphous Zr-Cu-Ni alloy: Calculation of the activation energy Journal of Alloys and Compounds 353 200–206.CrossRefGoogle Scholar
Xu, J. Jiang, H. Li, T. Wei, X. Wang, T. Huang, J. Wang, W. Smith, A.L. Wang, J. Zhang, R. Xu, Y. Li, L. Prud’homme, R.K. and Guo, X., 2015 Effect of comb-type copolymers with various pendants on flow ability of heavy crude oil Industrial & Engineering Chemistry Research 54 5204–5212.CrossRefGoogle Scholar
Yang, F. Paso, K. Norrman, J. Li, C. Oschmann, H. and Sjoblom, J., 2015a Hydrophilic nanoparticles facilitate wax inhibition Energy & Fuels 29 1368–1374.CrossRefGoogle Scholar
Yang, F. Yao, B. Li, C. Shi, X. Sun, G. and Ma, X., 2017a Performance improvement of the ethylene-vinyl acetate copolymer (EVA) pour point depressant by small dosages of the polymethylsilsesquioxane (PMSQ) microsphere: An experimental study Fuel 207 204–213.CrossRefGoogle Scholar
Yang, F. Yao, B. Li, C. Sun, G. and Ma, X., 2017b Oil dispersible polymethylsilsesquioxane (PMSQ) microspheres improve the flow behavior of waxy crude oil through spacial hindrance effect Fuel 199 4–13.CrossRefGoogle Scholar
Yang, F. Zhao, Y. Sjöblom, J. Li, C. and Paso, K.G., 2015b Polymeric wax inhibitors and pour point depressants for waxy crude oils: A critical review Journal of Dispersion Science and Technology 36 213–225.CrossRefGoogle Scholar
Yao, B. Li, C. Yang, F. Mu, Z. Zhang, X. and Sun, G., 2017 Effect of oil dispersible polymethylsilsesquioxane microspheres on the formation and breakage of model waxy oil gels Fuel 209 424–433.CrossRefGoogle Scholar
Yao, B. Li, C. Yang, F. Sjöblom, J. Zhang, Y. Norrman, J. Paso, K. and Xiao, Z., 2016a Organically modified nanoclay facilitates pour point depressing activity of polyoctadecylacrylate Fuel 166 96–105.CrossRefGoogle Scholar
Yao, B. Li, C. Yang, F. Zhang, X. Mu, Z. Sun, G. and Zhao, Y., 2018a Ethylene-vinyl acetate copolymer (EVA) and resin-stabilized asphaltenes synergistically improve the flow behavior of model waxy oils: 1 Effect of wax content and the synergistic mechanism. Energy & Fuels 32 1567–1578.Google Scholar
Yao, B. Li, C. Yang, F. Zhang, Y. Xiao, Z. and Sun, G., 2016b Structural properties of gelled Changqing waxy crude oil benefitted with nanocomposite pour point depressant Fuel 184 544–554.CrossRefGoogle Scholar
Yao, B. Li, C. Zhang, X. Yang, F. Sun, G. and Zhao, Y., 2018b Performance improvement of the ethylene-vinyl acetate copolymer (EVA) pour point depressant by small dosage of the amino-functionalized polymethylsilsesquioxane (PAMSQ) microsphere Fuel 220 167–176.CrossRefGoogle Scholar
Yao, B. Wang, L. Yang, F. Li, C. and Zhao, Y., 2016c Effect of vinyl-acetate moiety molar fraction on the performance of poly (octadecyl acrylate-vinyl acetate) pour point depressants: experiments and mesoscopic dynamics simulation Energy & Fuels 31 448–457.CrossRefGoogle Scholar
Yi, S. and Zhang, J., 2011 Shear-induced change in morphology of wax crystals and flow properties of waxy crudes modified with the pour-point depressant Energy & Fuels 25 5660–5671.CrossRefGoogle Scholar