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Experimental and simulation studies of iron oxides for geochemical fixation of CO2-SO2 gas mixtures

Energy Procedia
By: , , , and 
https://doi.org/10.1016/j.egypro.2011.02.486

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Abstract

Iron-bearing minerals are reactive phases of the subsurface environment and could potentially trap CO2–SO2gas mixtures derived from fossil fuel combustion processes by their conversion to siderite (FeCO3) and dissolved sulfate. Changes in fluid and mineral compositions resulting from reactions, involving the co-injection of SO2 with CO2 were observed both theoretically and experimentally. Experiments were conducted with a natural hematite (α-Fe2O3) sample. A high pressure-high temperature apparatus was used to simulate conditions in geologic formations deeper than 800 m, where CO2 is in the supercritical state. Solid samples were allowed to react with a NaCl–NaOH brine and SO2-bearing CO2-dominated gas mixtures. The predicted equilibrium mineral assemblage at 100 °C and 250 bar became hematite, dawsonite (NaAl(OH)2CO3), siderite (FeCO3) and quartz (SiO2). Experimentally, siderite and dawsonite, derived from the presence of kaolinite (Al2Si2O5(OH)4) in the parent material, were present in residual solids at longer reaction time intervals, which agreed well with results from the modelling work.

Publication type Article
Publication Subtype Journal Article
Title Experimental and simulation studies of iron oxides for geochemical fixation of CO2-SO2 gas mixtures
Series title Energy Procedia
DOI 10.1016/j.egypro.2011.02.486
Volume 4
Year Published 2011
Language English
Publisher Elsevier
Description 6 p.
First page 5108
Last page 5113
Conference Title 10th International Conference on Greenhouse Gas Control Technologies
Conference Location Amsterdam
Conference Date 19 September 2010 through 23 September 2010
Online Only (Y/N) N
Additional Online Files (Y/N) N
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