Asphaltene behavior at the interface oil-nanofluids: Implications to adsorption
Asphaltene behavior at the interface oil-nanofluids: Implications to adsorption
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油-纳米流体界面的沥青质行为：对吸附的影响
DOI：
10.1016/j.colsurfa.2021.126630
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Nguele R. and Sasaki K.
中科院分区：
文献类型：
--
作者：
Yang H.L.;Kano S.;McGrady J.;Shen J.J.;Matsukawa Y.;Chen D.Y.;Murakami K.;Abe H.;大友陽子;分山達也;Nguele R. and Sasaki K.
研究了沥青质在油/硅基纳米流体和油/润湿砂岩界面上的吸附机理。将使用正庚烷从死重油中提取的沥青质样品溶解在甲苯中以获得浓度为3.23mg/g的溶液。在二氧化碳（CO2）鼓泡的存在下，使溶液接触用不同的基于二氧化硅的纳米流体润湿的破碎的Berea砂岩。通过将二氧化硅纳米颗粒（0.1重量%）分散到改性聚乙烯醇（1重量%）的水溶液中来制备二氧化硅基纳米流体。进行了分批和动态吸附。采用固-液平衡模型对沥青质的吸附机理进行了描述，并得到了吸附亲和力和沥青质自聚集等吸附参数。批吸附结果表明，沥青质开发了更强的亲和力与二氧化硅纳米流体膜，这导致吸附四倍低的砂岩润湿的基础流体（聚合物）相比。它还表明，吸附随聚合物浓度的降低而降低。从沥青质的固有性质来看，芳香核较大的沥青质分子扩散较小，吸附性较低。无论核尺寸如何，在纳米流体膜处的亲和力随着杂原子与总碳的比率而增加。此外，基础流体的化学性质对吸附亲和力和沥青质自缔合都起作用。动态吸附结果的nanofluid-wet砂岩被发现三倍大批量吸附结果相比。其主要原因是沥青质的自缔合作用促进了水对沥青质扩散势垒的改变。
The mechanisms pertaining to the asphaltene adsorption at the interface oil/silica-based nanofluid and oil/wetted sandstone are examined. Asphaltene sample, extracted from a dead heavy oil using n-heptane, was dissolved into toluene to obtain a solution with a concentration of 3.23 mg/g. The solution was allowed to contact crushed Berea sandstone wetted with different silica-based nanofluids in the presence of carbon dioxide (CO2) bubbling. The silica-based nanofluid was prepared by dispersing silica oxide nanoparticle (0.1 wt%) into an aqueous solution of modified polyvinyl alcohol (1 wt%). Both batch and dynamic adsorptions were performed. A Solid-Liquid Equilibrium (SLE) model was employed not only to describe the adsorption mechanisms, but also to obtain the adsorptions parameters including the adsorption affinity and the asphaltene-self aggregation. The batch adsorption results reveal that asphaltenes develop a stronger affinity with the silica nanofluid film, which leads to an adsorption four-fold lower compared to sandstone wetted with the base fluid (polymer). It is also shown that the adsorption decreases with the decrease in the concentration of the polymer. In respect of the intrinsic properties of asphaltenes, it is found that the asphaltene molecules with a large aromatic core diffuse less, thus have a low adsorption. Irrespective of the core size, the affinity at the nanofluid film increases with the ratio in heteroatom-to-total carbon. Furthermore, the chemistry of the base fluid acts upon both the adsorption affinity and asphaltene self-association. Dynamic adsorption results on a nanofluid-wet sandstone were found three-fold larger compared to batch adsorption results. The primary reason is attributed to the alteration of the diffusion-barrier by the water, which promotes owing to the self-association of asphaltenes.
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DOI：
10.1016/b978-1-85617-558-6.00001-5
发表时间：
2011
期刊：
--
影响因子：
--
作者：
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DOI：
10.1007/s13202-021-01112-6
发表时间：
2021
期刊：
Journal of Petroleum Exploration and Production
影响因子：
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作者：
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影响因子：
2.1
作者：
N. Mungan
通讯作者：
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影响因子：
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作者：
Mansoori, G. Ali;Vazquez, Dynora;Shariaty-Niassar, Mojtaba
通讯作者：
Shariaty-Niassar, Mojtaba
影响因子：
5.3
作者：
Wiehe, IA;Yarranton, HW;Teclemariam, A
通讯作者：
Teclemariam, A