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Foamability and foam stability at high pressures and temperatures. I. Instrument validation
KTH, School of Chemical Science and Engineering (CHE), Chemistry, Surface Chemistry.
2003 (English)In: Review of Scientific Instruments, Vol. 74, no 5, 2925-2932 p.Article in journal (Refereed) Published
Abstract [en]

An instrument was designed and assembled with the aim of measuring macroscopic properties of foams (such as foamability and stability) under high pressures and moderate temps. (up to 105 bar and 425 K, resp.). The device makes use of IR sensors to detect the foam forefront position as it is generated by gas sparging in the foaming soln. The measurement makes use of a modified dynamic Bikerman protocol to est. the foamability and stability of the studied soln. Traditional direct observation used in foam expts. at ambient conditions is therefore circumvented and the instrument can be set up in an appropriate place and monitored remotely so as to reduce the risks involved in high-pressure, high-temp. operations. Data from the IR system allows not only following the dynamics of foam phenomena but also the relative foam quality along the column, and the presence of air pockets in the case of unstable or pulsating foams. A series of fluorosurfactants (cationic, anionic, and nonionic) were used to validate the instrument and the effect of temp. on foamability, foam stability and foam quality is discussed. Finally, synergistic effects were obsd. with respect to the foam behavior of different mixts. of the studied surfactants. [on SciFinder (R)]

Place, publisher, year, edition, pages
2003. Vol. 74, no 5, 2925-2932 p.
Keyword [en]
Surfactants (fluorosurfactants, foamability and foam stability at high pressure and temp. tested using), Stability (foam, foamability and foam stability at high pressure and temp.), Foaming (foamability and foam stability at high pressure and temp.), Apparatus (foaming, for test of foamability and foam stability at high pressure and temp.), Pressure, Temperature (high, foamability and foam stability at high pressure and temp.), Cooperative phenomena (synergism, during foam behavior of different mixts. of fluorosurfactants), foamability foam stability high pressure temp app instrument validation
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-58973OAI: oai:DiVA.org:kth-58973DiVA: diva2:486612
Note
CAN 139:90840 66-1 Surface Chemistry and Colloids Lab. FIRP, Escuela de Ingenieria Quimica,Universidad de Los Andes,Merida,Venez. Journal 0034-6748 written in English. 314057-01-7 (Zonyl fs-62) Role: PEP (Physical, engineering or chemical process), PRP (Properties), PYP (Physical process), PROC (Process) (anionic fluorosurfactant; foamability and foam stability at high pressure and temp. tested using); 75026-64-1 (Zonyl fsd) Role: PEP (Physical, engineering or chemical process), PRP (Properties), PYP (Physical process), PROC (Process) (cationic fluorosurfactant; foamability and foam stability at high pressure and temp. tested using); 57534-41-5 (Zonyl fsn) Role: PEP (Physical, engineering or chemical process), PRP (Properties), PYP (Physical process), PROC (Process) (nonionic fluorosurfactant; foamability and foam stability at high pressure and temp. tested using); 64-19-7 (Acetic acid); 67-63-0 (Isopropyl alcohol); 107-41-5 (Hexylene glycol); 7647-14-5 (Sodium chloride) Role: PEP (Physical, engineering or chemical process), PRP (Properties), PYP (Physical process), PROC (Process) (to prep. foaming solns. with fluorosurfactants) NR 20140805Available from: 2012-01-30 Created: 2012-01-09 Last updated: 2012-01-30Bibliographically approved

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