Supercritical CO 2 -philic nanoparticles suitable for determining the viability of carbon sequestration in shale

Yisheng Xu, Lin Chen, Yushi Zhao, Lawrence M. Cathles, Christopher K. Ober

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

© The Royal Society of Chemistry. A fracture spacing less than a decimeter is probably required for the successful sequestration of CO2 in shale. Tracer experiments using inert nanoparticles could determine if a fracturing this intense has been achieved. Here we describe the synthesis of supercritical CO2-philic nanoparticles suitable for this application. The nanoparticles are ~50 nm in diameter and consist of iron oxide (Fe3O4) and silica (SiO2) cores functionalized with a fluorescent polymeric corona. The nanoparticles stably disperse in supercritical carbon dioxide (scCO2) and are detectable to concentrations of 10 ppm. This journal is
Original languageEnglish (US)
Pages (from-to)288-296
Number of pages9
JournalEnviron. Sci.: Nano
Volume2
Issue number3
DOIs
StatePublished - 2015
Externally publishedYes

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