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Titolo:
Thin liquid film technique - application to water-oil-water bitumen emulsion films
Autore:
Khristov, K; Taylor, SD; Czarnecki, J; Masliyah, J;
Indirizzi:
Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G6, Canada Univ Alberta Edmonton AB Canada T6G 2G6 ngn, Edmonton, AB T6G 2G6, Canada Syncrude Canada Ltd, Edmonton Res Ctr, Edmonton, AB T6N 1H4, Canada Syncrude Canada Ltd Edmonton AB Canada T6N 1H4 monton, AB T6N 1H4, Canada Bulgarian Acad Sci, Inst Phys Chem, BU-1113 Sofia, Bulgaria Bulgarian AcadSci Sofia Bulgaria BU-1113 Chem, BU-1113 Sofia, Bulgaria
Titolo Testata:
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
fascicolo: 1-2, volume: 174, anno: 2000,
pagine: 183 - 196
SICI:
0927-7757(20001115)174:1-2<183:TLFT-A>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
ASPHALTENE PRECIPITATION; CRUDE OILS; FOAM FILMS; STABILITY; AGGREGATION; SOLVENTS; BEHAVIOR;
Keywords:
non-aqueous films; bitumen; water-in-oil emulsion; asphaltenes;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Masliyah, J Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G6, Canada Univ Alberta Edmonton AB Canada T6G 2G6 n, AB T6G 2G6, Canada
Citazione:
K. Khristov et al., "Thin liquid film technique - application to water-oil-water bitumen emulsion films", COLL SURF A, 174(1-2), 2000, pp. 183-196

Abstract

We describe an adaptation of the thin liquid film-pressure balance technique (TLF-PBT) for a systematic study of water/diluted-bitumen/water thin films. Recent research into the stability of water-in-oil emulsions, particularly those occurring in the oil industry, has not properly addressed the dependence of the emulsion stability on the thin films that are formed betweenapproaching water droplets. The objective of this study is to obtain some insight into the mechanisms that stabilize the emulsion with particular attention to the relative importance of the resin, asphaltene, and solids fractions of the bitumen. Measurements of film lifetime and equivalent thickness indicated that the behavior of the film strongly depended on the type andconcentration of solvent used to dilute the bitumen. Toluene-diluted-bitumen films drained continuously until a stable, uniform grey film was formed. Heptane-diluted-bitumen films formed black films covered with a scatter ofsmall white dimples containing trapped liquid except at heptane:bitumen weight ratios of 10:1-15:1, where a network of fine white spots of unknown origin was formed. While the asphaltene and resin fractions alone provide a partially stable film, the combination of resin and asphaltene produced extremely stable films, a result that agrees well with emulsion studies by other researchers. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 18:51:15