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Effect of Composition and Interfacial Tension on the Rheology and Morphology of Heavy Oil-In-Water Emulsions.
ACS Omega ( IF 3.7 ) Pub Date : 2020-07-01 , DOI: 10.1021/acsomega.0c00769 Marianna P Arinina 1 , Kirill V Zuev 1 , Valery G Kulichikhin 1 , Alexander Ya Malkin 1
ACS Omega ( IF 3.7 ) Pub Date : 2020-07-01 , DOI: 10.1021/acsomega.0c00769 Marianna P Arinina 1 , Kirill V Zuev 1 , Valery G Kulichikhin 1 , Alexander Ya Malkin 1
Affiliation
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Rheological and morphological properties of heavy crude oil-in-water (O/W) emulsions have been studied. Two series of emulsions were considered: first, the surfactant type remained constant, while the continuous phase content was varied and second, the surfactant type was varied while the continuous phase content remained constant. Under stress-controlled shearing, all samples exhibit viscoplastic behavior. The rheological properties are directly related to the morphology of the emulsions which vary in size of dispersed phase droplets and their inherent structure. Adding a surfactant characterized by a high value of interfacial oil–water tension results in a decrease in the yield stress (which is a measure of the interparticulate structure strength). The same effect is attained by increasing the water content. Meanwhile, these two factors determine the viscosity which can be much lower than that of the basic heavy crude oil if the O/W type of emulsions has been created. Special attention was paid to the viscoelastic properties which have been scarcely reported. Correlations were found between the surfactant properties, composition of the emulsion, and rheological characteristics of emulsions (yield stress, apparent viscosity, and viscoelastic properties), which allows for reduction in the crude oil viscosity down to a low enough level acceptable for pipe transportation.
中文翻译：
组成和界面张力对重油包水乳液流变学和形态的影响。
研究了重质水包油（O / W）乳液的流变学和形态学特性。考虑了两个系列的乳液：第一，表面活性剂类型保持恒定，而连续相含量变化；第二，表面活性剂类型变化，而连续相含量不变。在应力控制的剪切下，所有样品均表现出粘塑性行为。流变性质与乳液的形态直接相关，乳液的形态随分散相液滴的大小及其固有结构而变化。添加具有高界面油水张力值的表面活性剂会导致屈服应力降低（这是颗粒间结构强度的度量）。通过增加水含量可以获得相同的效果。与此同时，如果创建了O / W型乳化剂，这两个因素决定的粘度可能比基本重质原油的粘度低得多。特别关注很少报道的粘弹性。发现表面活性剂性质，乳液组成和乳液的流变特性（屈服应力，表观粘度和粘弹性）之间存在相关性，从而可以将原油粘度降低至足够低的水平以供管道运输使用。
更新日期：2020-07-14
中文翻译：
组成和界面张力对重油包水乳液流变学和形态的影响。
研究了重质水包油（O / W）乳液的流变学和形态学特性。考虑了两个系列的乳液：第一，表面活性剂类型保持恒定，而连续相含量变化；第二，表面活性剂类型变化，而连续相含量不变。在应力控制的剪切下，所有样品均表现出粘塑性行为。流变性质与乳液的形态直接相关，乳液的形态随分散相液滴的大小及其固有结构而变化。添加具有高界面油水张力值的表面活性剂会导致屈服应力降低（这是颗粒间结构强度的度量）。通过增加水含量可以获得相同的效果。与此同时，如果创建了O / W型乳化剂，这两个因素决定的粘度可能比基本重质原油的粘度低得多。特别关注很少报道的粘弹性。发现表面活性剂性质，乳液组成和乳液的流变特性（屈服应力，表观粘度和粘弹性）之间存在相关性，从而可以将原油粘度降低至足够低的水平以供管道运输使用。
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