跳至主要内容

Precipitation of Heavy Organics (Asphaltenes) from Crude Oil Residue Using Binary Mixtures of n-Alkanes

Read  full  paper  at:
http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53392#.VMBv_SzQrzE

Author(s)  

ABSTRACT
Two solvent mixtures: n-pentane/n-hexane and n-heptane/n-octane at ten different percentage ratios were used to dissolve 2.5 g of vacuum distilled Anthan crude oil residue (500°C). The crude oil/n-alkane mixture in different conical flasks was stoppered, shaked mechanically and allowed to stand overnight. The resultant solution was subsequently filtered using a vacuum pump to afford the different weights of the residue (asphaltenes). The result of the weights of asphaltenes obtained at the different ratios of solvent mixtures showed that the highest amount of precipitate was obtained at 100% n-pentane solvent. Also there was a sharp increase in the amount of asphaltenes precipitated when the percentage ratio of n-pentane to n-hexane precipitant was 40:60 and when the ratio of n-heptane to n-octane precipitant was 30:70. A good understanding of the contribution of the different n-alkane solvents in the precipitation of asphaltenes is very necessary to flow assurance of crude oils in terms of solid precipitation.
 
Cite this paper
Achugasim, O. and Ekpo, I. (2015) Precipitation of Heavy Organics (Asphaltenes) from Crude Oil Residue Using Binary Mixtures of n-Alkanes. Advances in Chemical Engineering and Science, 5, 96-101. doi: 10.4236/aces.2015.51010.
 
References
[1]Ojinnaka, C., Osuji, L. and Achugasim, O. (2012) Remediation of Hydrocarbons in Crude Oil Contaminated Soil Using Fenton’s Reagent. Environmental Monitoring and Assessment, 184, 6527-6540.
http://dx.doi.org/10.1007/s10661-011-2438-3
 
[2]Vazquez, D. and Mansoori, G.A. (2000) Analysis of Heavy Organic Deposits Based on Identification and Measurement of Petroleum Precipitates. Journal of Petroleum Science and Engineering, 26, 49-56.
http://dx.doi.org/10.1016/S0920-4105(00)00020-6
 
[3]Hunt, J.M. (1996) Petroleum Geochemistry and Geology. Freedman, New York, 9.
 
[4]Hyne, N.J. (2001) Non-Technical Guide to Petroleum Geology, Exploration, Drilling and Production. Penwell, Taxes, 4.
 
[5]Kawanaka, S., Park, S.J. and Mansoori, G.A. (1991) Organic Deposition from Reservoir Fluids—A Thermodynamic Predictive Technique. S.P.E Reservoir Engineering Journal, 24, 283.
 
[6]Achugasim, O., Ojinnaka, C. and Osuji, L. (2013) Management of Petroporphyrins in a Crude Oil Polluted Environment. European Chemical Bulletin, 2, 794-796.
 
[7]Speight, J.G. (1999) The Chemistry and Technology of Petroleum. Marcel Decker, New York, 412-464.
http://dx.doi.org/10.1201/9780824742119.ch10
 
[8]Leonartaritis, K.J. and Mansoori, G.A. (1988) Asphaltene Deposition. A Survey of Field Experiences and Research Approaches. Journal of Petroleum Science and Engineering, 1, 229.
http://dx.doi.org/10.1016/0920-4105(88)90013-7
 
[9]Kokal, S.C. and Sayeh, S.G. (1995) Asphaltenes: The Cholesterol of Petroleum. SPE 29787. SPE Middle East Oil Show, Bahrain, 11-14.
 
[10]Hirschberg, A., DeJong, L.N., Schipper, B.A. and Mayers, J.G. (1984) Influence of Temperature and Pressure on Asphaltene Flucculation. Society of Petroleum Engineering Journal, 24, 283.
http://dx.doi.org/10.2118/11202-PA
 
[11]Kokal, S.C., Nayman, J., Sayeh, S.G. and George, A.E. (1992) Measurement and Correlation of Ashphaltene Precipitation from Heavy Oils by Gas Injection. Journal of Canadian Petroleum Technology, 31, 24.
http://dx.doi.org/10.2118/92-04-01
 
[12]Okoye, I.P., Ofodile, S.E. and Chukwu, O.C. (2011) The Effect of Different Solvent Polarity on the Precipitation of Heavy Organics from a Crude Oil Deposit in the Niger Delta. Scienctia Africana, 10, 9-15.     eww150122lx
标签：

评论

发表评论

此博客中的热门博文

Does Immigration Promote the Investment of the Monopolistic Firm?

In the present paper, we examine the effect of increasing uncertainty of immigrants’ growth on the optimal timing of investment of a firm that has a monopolistic power over the labor market. It is revealed that when the uncertainty of immigrants’ growth is more than a threshold level, increasing uncertainty of immigrants’ growth accelerates the optimal timing of firms’ investment and enhances the economic growth, even if the uncertainty of immigrants’ growth is formulated by the geometric Brownian motion, which is in sharp contrast to the standard result that an increase in the uncertainty postpones the optimal timing. With an increase in the immigrants over the past ten years, workforces in the host countries have been growing significantly to the extent that the immigrants represent 70% of the increase in the workforce in Europe, and 47% in the United States as OECD indicates. In the present paper, we attempted to investigate the effect of increased uncertainty caused by the growi...
发表评论
阅读全文

Education Policy Implementation: A Mechanism for Enhancing Primary Education Development in Zanzibar

Education is one of the fundamental rights of individuals; therefore, the government of a country needs to develop and strengthen educational policy and quality as well as to ensure that everyone has equal access to basic education. The improvement of access and quality of education in the world is becoming as an essential factor in development, whereas the basic education (primary school), is acknowledged as a foundation of the higher educational development for every country. To fulfill this goal, governments introduce several policies and procedures; however, it requires some reforms and participation from the politician, policymakers, and other stakeholders to re-examine educational policy so that it can lead to multiplication and betterment of the reforms. Educational reforms actually focus on accountability. A positive educational development and reform is very challenging and needs more effort and strategy on how to use and utilize the resources effectively as such it can achie...
发表评论
阅读全文