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dc.contributor.authorMolnes, Silje
dc.contributor.authorPaso, Kristofer Gunnar
dc.contributor.authorStrand, Skule
dc.contributor.authorSyverud, Kristin
dc.date.accessioned2020-03-19T15:58:02Z
dc.date.available2020-03-19T15:58:02Z
dc.date.created2017-08-16T09:27:16Z
dc.date.issued2017-08
dc.identifier.citationMolnes, S.N., Paso, K.G., Strand, S. et al. (2017) The effects of pH, time and temperature on the stability and viscosity of cellulose nanocrystal (CNC) dispersions: implications for use in enhanced oil recovery. Cellulose, 24(10), 4479–4491en_US
dc.identifier.issn0969-0239
dc.identifier.urihttps://hdl.handle.net/11250/2647640
dc.descriptionThis is a post-peer-review, pre-copyedit version of an article published in Cellulose. The final authenticated version is available online at: http://dx.doi.org/10.1007/s10570-013-9871-0.en_US
dc.description.abstractCellulose nanocrystals (CNC) are currently being investigated as potential additives for enhanced oil recovery (EOR). Presented in this paper is a study investigating the effects of different physical and chemical environments that low concentration CNC dispersions may be subjected to at oil reservoir conditions. Different concentrations of CNC dispersed in de-ionized water and in a 1000 ppm NaCl brine were subjected to variations in pH and temperature, and the results showed that the dispersions remained stable in the pH range expected in oil reservoirs (between 5 and 9). Stable dispersions were also observed when heated to temperatures ranging from 50 to 90 °C. At extended heat aging at 90 and 120 °C for seven days; beginning degradation was observed for both types of CNC dispersions; with viscosity increase and pH decrease as the most important indicators. CNC dispersed in 1000 ppm NaCl brine was generally more heat tolerant than the CNC dispersed in de-ionized water. The increase in viscosity during heat aging can be very interesting for EOR applications. A fluid that increases its viscosity with heat and time will be easier to inject due to a low initial viscosity, and when the viscosity increases in the porous reservoir, the effect can be a stable waterfront and less viscous fingering, which again can lead to increased sweep efficiency and better oil recovery.en_US
dc.language.isoengen_US
dc.publisherSpringer International Publishingen_US
dc.subjectcelluloseen_US
dc.subjectEORen_US
dc.subjectenhanced oil recoveryen_US
dc.titleThe effects of pH, time and temperature on the stability and viscosity of cellulose nanocrystal (CNC) dispersions: implications for use in enhanced oil recoveryen_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.description.versionacceptedVersionen_US
dc.rights.holder(C) 2017 Springeren_US
dc.subject.nsiVDP::Mathematics and natural science: 400::Basic biosciences: 470::Biochemistry: 476en_US
dc.subject.nsiVDP::Mathematics and natural science: 400::Chemistry: 440en_US
dc.subject.nsiVDP::Technology: 500::Rock and petroleum disciplines: 510::Petroleum engineering: 512en_US
dc.source.pagenumber4479–4491en_US
dc.source.volume24en_US
dc.source.journalCelluloseen_US
dc.source.issue10en_US
dc.identifier.doi10.1007/s10570-017-1437-0
dc.identifier.cristin1486518
cristin.unitcode217,8,6,0
cristin.unitnameInstitutt for petroleumsteknologi
cristin.ispublishedfalse
cristin.fulltextpostprint
cristin.qualitycode1


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