Bitumen emulsification using a hydrophilic polymeric surfactant: Performance evaluation in the presence of salinity
Bitumen emulsification using a hydrophilic polymeric surfactant: Performance evaluation in the presence of salinity
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DOI：
10.1016/j.petrol.2015.11.031
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发表时间：
2016-02-01
影响因子：
--
通讯作者：
Nakano, M.
中科院分区：
文献类型：
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作者：
Alade, O. S.;Sasaki, K.;Nakano, M.
本研究将沥青分散在含有溶解盐（NaCl）的PVA（聚乙烯醇）水溶液中。研究了分散体系的稳定性和流变性能，评价了盐对分散体系的影响。在等温条件下（温度为20℃），当盐含量为0.5% w/w时，沥青含量为50%的水包沥青乳液的稳定性得到提高，而当盐含量为1% w/w及以上时，乳液的稳定性下降。此外，该化学品对盐度的耐受性得到了证实，因为水溶液的表面张力和乳剂的粒径在本研究中考虑的盐度水平下没有显著影响。此外，流变特性分析表明，无论盐含量如何，乳状液都表现为非牛顿伪塑性（剪切减薄）流体。当盐度为1.0% w/w时，对乳状液的表观粘度影响不显著；而2% w/w和3.5% w/w的盐含量使乳状液的表观粘度增加。(c) 2015 Elsevier B.V.版权所有
In the present study, bitumen was dispersed in the aqueous solution of PVA (Poly Vinyl Alcohol) containing dissolved salt (NaCl). The stability and rheological property were studied to evaluate the characteristics of the dispersion system under the influence of salt. Under an isothermal condition (temperature of 20 degrees C), it was observed that the stability of bitumen-in-water emulsion containing 50% bitumen content, was increased by the dissolution of 0.5% w/w salt in the aqueous phase while at the salt content of 1% w/w and above, the stability of emulsion was decreased. In addition, the tolerance of the chemical to salinity was confirmed since the surface tension of the aqueous solution and the particle size of emulsions were not significantly affected at the level of salinity considered in this study. Moreover, analysis of the rheological property indicated that, the emulsions behave as non-Newtonian pseudo plastic (shear thinning) fluid regardless of the salt content. The apparent viscosity of emulsion was not significantly affected at up to salinity level of 1.0% w/w; while the salt content of 2% w/w and 3.5% w/w increased the apparent viscosity of emulsion. (c) 2015 Elsevier B.V. All rights reserved.