scholarly journals Controlled reduction of aromaticity of alkylated polyaromatic compounds by selective oxidation using H2WO4, H3PO4 and H2O2: A route for upgrading heavy oil fractions

2021 ◽  
Author(s):  
Ewa Nowicka ◽  
Meenakshisundaram Sankar ◽  
Robert Jenkins ◽  
D. W. Knight ◽  
David J Willock ◽  
...  
Keyword(s):  
Crude Oil ◽  
Selective Oxidation ◽  
Heavy Oil ◽  
Significant Proportion ◽  
Fractional Distillation ◽  
Heavy Crude Oil ◽  
Oil Fractions ◽  
Heavy Crude ◽  
Crude Oil Fractions ◽  
Hydrocarbon Reserves

Heavy crude oil fractions which form the residues from fractional distillation are a significant proportion of current hydrocarbon reserves. However, processing residues for use as chemicals or fuels is hampered...

COMPLEX PERMITTIVITY OF CRUDE OILS AND SOLUTIONS OF HEAVY CRUDE OIL FRACTIONS

1998 ◽  
Vol 19 (1) ◽  
pp. 93-126 ◽  
Author(s):  
Trond Friisø ◽  
Yannick Schildberg ◽  
Odile Rambeau ◽  
Tore Tjomsland ◽  
Harald Førdedal ◽  
...  
Keyword(s):  
Crude Oil ◽  
Complex Permittivity ◽  
Crude Oils ◽  
Heavy Crude Oil ◽  
Oil Fractions ◽  
Heavy Crude ◽  
Crude Oil Fractions

scholarly journals A comprehensive investigation of refinery preheaters foulant samples originated by heavy crude oil fractions as heating fluids

Fuel ◽  
2018 ◽  
Vol 224 ◽  
pp. 529-536 ◽  
Author(s):  
Elaheh Behranvand ◽  
Mohammad Reza Mozdianfard ◽  
Emilio Diaz-Bejarano ◽  
Francesco Coletti ◽  
Pawel Orzlowski ◽  
...  
Keyword(s):  
Crude Oil ◽  
Heavy Crude Oil ◽  
Comprehensive Investigation ◽  
Oil Fractions ◽  
Heavy Crude ◽  
Crude Oil Fractions

Characterization of heavy crude oil fractions by means of the 13C NMR technique

1979 ◽  
Vol 44 (4) ◽  
pp. 1160-1166 ◽  
Author(s):  
Milan Hájek ◽  
Gustav Šebor ◽  
Ivo Lang ◽  
Zenon Starčuk ◽  
Otto Weisser ◽  
...  
Keyword(s):  
Crude Oil ◽  
Nmr Spectra ◽  
Heavy Crude Oil ◽  
Aromatic Rings ◽  
Oil Fractions ◽  
Aliphatic Carbon ◽  
Heavy Crude ◽  
Crude Oil Fractions ◽  
C Nmr

The 13C NMR spectra of samples of heavy crude oil fractions were interpreted. The spectra of all samples were of the same character. In the region of the aliphatic carbon shifts, ten different carbon atom types were discerned; some possible structure types of hydrocarbons were attributed to them and the arrangement of the aromatic rings in a mean molecule of the samples examined was discussed.

The transalkylation reaction: Analytical tool for the study of heavy crude oil fractions. Application to asphaltenes of various types

1990 ◽  
Vol 16 (4-6) ◽  
pp. 969-980 ◽  
Author(s):  
P.-L. Desbene ◽  
A. Abderrezag ◽  
B. Desmazieres ◽  
J.-J. Basselier ◽  
F. Behar ◽  
...  
Keyword(s):  
Crude Oil ◽  
Analytical Tool ◽  
Heavy Crude Oil ◽  
Oil Fractions ◽  
Heavy Crude ◽  
Crude Oil Fractions

Flow Patterns in Heavy Crude Oil-Water Flow

2001 ◽  
Author(s):  
Antonio C. Bannwart ◽  
Oscar M. H. Rodriguez ◽  
Carlos H. M. de Carvalho ◽  
Isabela S. Wang ◽  
Rosa M. O. Vara
Keyword(s):  
Crude Oil ◽  
Flow Pattern ◽  
Heavy Oil ◽  
Annular Flow ◽  
Effective Means ◽  
Practical Importance ◽  
Flow Patterns ◽  
Heavy Crude Oil ◽  
Oil Water ◽  
Heavy Crude

Abstract This paper is aimed to an experimental study on the flow patterns formed by heavy crude oil (488 mPa.s, 925.5 kg/m3 at 20 °C) and water inside vertical and horizontal 1 in. pipes. The interfacial tension was 29 dynes/cm. Effort is concentrated into flow pattern characterization, which was visually defined. The similarities with gas-liquid flow patterns are explored and the results are expressed in flow maps of the superficial velocities. In contrast with other studies, the annular flow pattern (‘core annular flow’) was observed in both horizontal and vertical test sections. In fact this flow pattern typically occurs in heavy oil-water flows at low water input fractions. Because of the practical importance of core flow in providing an effective means for heavy oil production and transportation, this paper discusses two criteria that favor its occurrence in pipes.

Flow Patterns in Heavy Crude Oil-Water Flow

2004 ◽  
Vol 126 (3) ◽  
pp. 184-189 ◽  
Author(s):  
Antonio C. Bannwart ◽  
Oscar M. H. Rodriguez ◽  
Carlos H. M. de Carvalho ◽  
Isabela S. Wang ◽  
Rosa M. O. Vara
Keyword(s):  
Crude Oil ◽  
Flow Pattern ◽  
Heavy Oil ◽  
Annular Flow ◽  
Effective Means ◽  
Practical Importance ◽  
Flow Patterns ◽  
Heavy Crude Oil ◽  
Oil Water ◽  
Heavy Crude

This paper is aimed to an experimental study on the flow patterns formed by heavy crude oil (initial viscosity and density 488 mPa s, 925.5kg/m3 at 20°C) and water inside vertical and horizontal 2.84-cm-i.d. pipes. The oil-water interfacial tension was 29 dyn/cm. Effort is concentrated into flow pattern characterization, which was visually defined. The similarities with gas-liquid flow patterns are explored and the results are expressed in flow maps. In contrast with other studies, the annular flow pattern (“core annular flow”) was observed in both horizontal and vertical test sections. These flow pattern tends to occur in heavy oil-water flows at low water input fractions. Because of the practical importance of core flow in providing an effective means for heavy oil production and transportation, this paper discusses criteria that favor its occurrence in pipes.

Isothermal oxidation behavior of heavy crude oil and its low-temperature oxidized oils: Implications for in-situ upgrading of heavy oil

Fuel ◽  
2021 ◽  
pp. 122704
Author(s):  
Shuai Zhao ◽  
Haiming Gao ◽  
Wanfen Pu ◽  
Mikhail A. Varfolomeev ◽  
Chengdong Yuan
Keyword(s):  
Low Temperature ◽  
Crude Oil ◽  
Heavy Oil ◽  
Oxidation Behavior ◽  
Isothermal Oxidation ◽  
Heavy Crude Oil ◽  
Heavy Crude
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