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油砂水基分离过程中表面性能的研究
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摘要
随着常规石油资源的减少,油砂的开采和分离引起的高度关注。水基提取技术分离油砂矿的分离方法在国外已经广泛应用。然而,我国在非常规油气资源的开发和研究方面相对比较滞后,目前还不具备成熟的油砂分离技术。研究我国典型油砂矿的组成和性能评价,选择合理油砂分离技术是发展非常规石油资源的重要组成部分,也为我国大规模的工业做好技术储备。本论文工作以油砂水基分离过程中表面性能为研究重点,探索油砂矿特性与水基分离的重要关系,主要的研究成果包括以下三个方面。
     1.以内蒙古扎赉特旗和新疆黑油山油砂分离出粒径小于50μm的微粒组分为研究对象,分别用油水法、渗透法和压片法对各种微粒组分表面的润湿性进行了表征。上述方法得出,两种微粒组分均显示疏水性,而相比扎赉特旗油砂微粒组分,黑油山油砂微粒则具有一定的亲水性。当微粒样品经过高温灼烧后,表面疏水性变为强亲水性。本实验两种油砂均属于油润性油砂,可能经历长期风化所致。
     2.以内蒙古扎赉特旗油砂分离出粒径小于50μm的微粒组分为研究对象,考察温度、电解质浓度、pH值、表面活性剂等对粘土固体表面Zeta电位的影响,并且应用Stern-couy-chapman扩散双电层理论,从微观角度来解释粘土在不同的条件下的ζ电位的变化。
     3.以内蒙古扎赉特旗油砂中分离出来的沥青为研究对象,考察温度、电解质浓度、pH值、表面活性剂等对沥青固体表面Zeta电位的影响,并且应用Stern-couy-chapman扩散双电层理论,从微观角度来解释沥青在不同的条件下的ζ电位的变化。
With the growing price of crude oil, oil sands has attracted much attention theexpoitation method and separation method. The fundamentals of water-basedextraction method used to recovery bitumen from oil sands were reviewed in aforeign country, but those were in the home. It is proposed that the exploitation ofdifferent types of oil sands, appropriate mining methods should be adopted afterdetailed analyzing the current different effective technologies and methods of oilsands. In the study, it is of the important research surface properties in water-basedbitumen extraction form oil sands, and the study on the oil sands characterizationand separation interact relationship. The main progress and research results havebeen obtained as follows:
     1. In this study, two oil sands were obtained from Hei-You-Shan, Xinjiang andZha-Lai-Te-Qi, Inner Mongolia, respectively. The solids were extracted from oilsands using solvent washing and fines (<50μm) were separated from the solids.The fines surface wettability was examined using various methods. It was foundthat both of the fines extracted from the oil sands are hydrophobic. It was alsofound that the fines after heating at high temperature of500°C for1h exhibitedstrong hydrophilicity, which was attributed to the elimination of the organicsadsorbed on the fines surface.
     2. In this study, oil sands were obtained from Zha-Lai-Te-Qi, Inner Mongolia.The solids were extracted from oil sands using solvent washing and fines(<50μm) were separated from the solids. The separation of bitumen from sandgrains is affected by the interactions between bitumen, sand grains, water and air,besides, such factors as temperature, pH value, mental ions and solid surfacealso have a great effect. Guided by the Stern-couy-chapman double layer theory,the ζ potential change of clay solids in various conditions can be interpretedmicroscopically.
     3. In this study, oil sands were obtained from Zha-Lai-Te-Qi, Inner Mongolia.The bitumen were extracted from oil sands using solvent washing. There weresuch factors as temperature, pH value, mental ions and solid surface effective.Guided by the Stern-couy-chapman double layer theory, the ζ potential change ofclay solids in various conditions can be interpreted microscopically.
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