To ensure the viability of geologic CO2 sequestration (GCS), we need a comprehensive understanding of reactions at supercritical CO2�brine�rock interfaces and the environmental factors affecting these interactions. This research investigated the effects of temperature, pressure, salinity, and organic compounds on the dissolution and surface morphological changes of two model reservoir minerals:  phlogopite ([KMg2.87Si3.07Al1.23O10(F,OH)2], clay mineral) and anorthite ([CaAl2Si2O8], feldspar). Acetate, propionate, oxalate, and malonate were chosen as representative organic compounds in brines. Atomic force microcopy recorded the evolution of the size, shape, and location of the secondary mineral nanoparticle phases. High-resolution transmission electron microscopy and Fourier transform infrared spectroscopy were used to identify the secondary mineral phases. Aqueous metal concentrations were analyzed with an inductively coupled plasma-mass spectrometer (ICP-MS). Using both fluid chemistry and surface analysis techniques, this work provides new and unique quantitative and qualitative information on nanoscale fluid-rock interactions under GCS conditions.

Organic-rich brine-mineral interactions under geologic CO<sub>2</sub> sequestration conditions

242nd National Meeting (2011)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.

Organic-rich brine-mineral interactions under geologic CO2 sequestration conditions

Organic-rich brine-mineral interactions under geologic CO₂ sequestration conditions