중유용 분산제 구조에 따른 중유 분산 특성
Dispersing Properties of Heavy Crude Oil according to Dispersant Structures
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초록
Heavy oil production is receiving significant attention because of increased demands for thermal power generation systems of the diesel engine and boilers. However, asphaltene, which is a heavy oil components (6-8 wt%), reduces the heat efficiency of the fuels owing to its agglomerated sludge of asphaltene during the burning process. Therefore, for hassle-free operation, we should develop asphaltene dispersants to suppress the formation of the sludge. We prepare variable salt-type polymeric dispersants using poly(isobutenyl succinic anhydride) and poly(amine) through both condensation esterification and acid-base neutralization reactions, which we subsequently evaluate for dispersing performance, using Turbiscan measurement. Total acid number (TAN) and total base number (TBN) of 75Lec-25SynDis.2 composed of lecithin and the prepared polymeric salt having the ratio of 3 : 1 are 18.9 and 33.7 mg KOH/g, respectively, which are comparable to those of the commercial dispersants (15.8 and 26.5 mg KOH/g). We determine the initial turbidity observed for 15 min of the polymeric dispersant was determined with transmittance (%), which can be calculated to separability number (SN). The SN value of 75Lec-25SynDis.2 is close to zero, which is superior to that of commercial dispersants and lecithin (0.015 and 0.017).
Abstract
Heavy oil production is receiving significant attention because of increased demands for thermal power generation systems of the diesel engine and boilers. However, asphaltene, which is a heavy oil components (6-8 wt%), reduces the heat efficiency of the fuels owing to its agglomerated sludge of asphaltene during the burning process. Therefore, for hassle-free operation, we should develop asphaltene dispersants to suppress the formation of the sludge. We prepare variable salt-type polymeric dispersants using poly(isobutenyl succinic anhydride) and poly(amine) through both condensation esterification and acid-base neutralization reactions, which we subsequently evaluate for dispersing performance, using Turbiscan measurement. Total acid number (TAN) and total base number (TBN) of 75Lec-25SynDis.2 composed of lecithin and the prepared polymeric salt having the ratio of 3 : 1 are 18.9 and 33.7 mg KOH/g, respectively, which are comparable to those of the commercial dispersants (15.8 and 26.5 mg KOH/g). We determine the initial turbidity observed for 15 min of the polymeric dispersant was determined with transmittance (%), which can be calculated to separability number (SN). The SN value of 75Lec-25SynDis.2 is close to zero, which is superior to that of commercial dispersants and lecithin (0.015 and 0.017).
참고문헌 (24)
- Al-Besharah, J. M., "Viscosity of crude oil blends", Ind. Eng. Chem. Res., 26, pp.2445~2449 (1987)
- Speight, J. G., "Petroleum chemistry and refining" (1998), Taylor and Francis
- Schwartz, J. A., "Chronic fuel oil toxicity in American mink(Mustela vison) : systemic and hematological effects of ingestion of a low-concentration of bunker C fuel oil", Toxicology and Applied Pharmacology, 200(2), pp.146~158 (2004)
- Wang, J., "Asphaltene Stability in Crude Oil and Aromatic Solvents-The Influence of Oil Composition", Energy and Fuels, 17(6), pp.1445~1451 (2003)
- Liao, Z. W., "Discussion on the structural features of asphaltene molecules", Energy & Fuels, 23, pp.6272~6274 (2009)
- Fenistein, D., "Viscosimetric and neutron scattering study of asphaltene aggregates in mixed toluene", heptane solvents, 1998, pp.14, 1013~1020
- Spiecker, P. M., "Aggregation and solubility behavior of asphaltenes and their subfractions", Journal of Colloid and Interface Science, 267, pp.178~193 (2003)
- Cao, K., "Study on the Influence of the Imidization Degree of Poly(styrene-co-octadecyl maleimide)as a Flow Improver in Waxy Crude Oils with Asphaltenes", Energy &Fuels, 29, pp.993~1000 (2015)
- González, G,, "The properties of the calcite—solution interface in the presence of adsorbed resins or asphaltenes", Colloids and Surfaces, 33, pp.217~229 (1988)
- Dicharry, C., "Stability of water", crude oil emulsions based on interfacial dilatational rheology, 2006, pp.297, 785~791
- Barcenas, M., "Study of medium effect on asphaltene agglomeration inhibitor efficiency", Energy and Fuels, 22, pp.1917~1922 (2008)
- Ghloum, E. F., "Effect of inhibitors on asphaltene precipitation for Marrat Kuwaiti reservoirs", Journal of Petroleum Science and Engineering, 70, pp.99~106 (2010)
- Spiecker, P. M., "Effects of petroleum resins on asphaltene aggregation and water-in-oil emulsion formation", Colloids and Surfaces A : Physicochemical and Engineering Aspects, 220, pp.9~17 (2003)
- Fan, Y., "Interfacial shear rheology of asphaltenes at oil-water interface and its relation to emulsion stability : Influence of concentration, solvent aromaticity and nonionic surfactant", Colloids and Surfaces A : Physicochemical and Engineering Aspects, 366, pp.120~128 (2010)
- Chávez-Miyauchi, T. E., "Aromatic polyisobutylene succinimides as viscosity reducers with asphaltene dispersion capability for heavy and extra-heavy crude oils", Energy and Fuels, 27, pp.1994~2001 (2013)
- Chang, C. L., "Stabilization of Asphaltenes in Aliphatic Solvents Using Alkylbenzene-Derived Amphiphiles. 1. Effect of the Chemical Structure of Amphiphiles on Asphaltene Stabilization", Langmuir, 10, pp.1749~1757 (1994)
- Chang, C. L., "Stabilization of Asphaltenes in Aliphatic Solvents Using Alkylbenzene-Derived Amphiphiles. 2. Study of the Asphaltene-Amphiphile Interactions and Structures Using Fourier Transform Infrared Spectroscopy and Small-Angle X-ray Scattering Techniques", Langmuir, 10, pp.1758~1766 (1994)
- González, G., "Peptization of asphaltene by various oil soluble amphiphiles", Colloids and Surfaces, 52, pp.207~217 (1991)
- Lima, A. F., "Polycardanol or sulfonated polystyrene as flocculants for asphaltene dispersions", Energy and Fuels, 24, pp.2369~2375 (2010)
- "Standard Test Method for Determination of Asphaltenes(Heptane Insolubles)in Crude Petroleum and Petroleum Products" (2012), ASTM international
- "Petroleum products-Determination of ash" (2001), ISO international organization for standardization
- "Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration" (2012), ASTM international
- "Standard Test Method for Base Number of Petroleum Products by Potentiometric Perchloric Acid Titration" (2012), ASTM international
- "Standard Test Method for Measuring n-Heptane Induced Phase Separation of Asphaltene-Containing Heavy Fuel Oils as Separability Number by an Optical Scanning Device" (2004), ASTM International