New method for carbon capture research
Researchers using the XSD 2-BM-A,B beamline at the APS are performing synchrotron based micro-tomography experiments to demonstrate a new numerical surface expansion and contraction method to evaluate the pore size distribution of a porous structure.
The method presented can be directly applied to the morphological studies of heterogeneous systems in various research fields, ranging from carbon capture and storage, and enhanced oil recovery to environmental remediation in the vadose zone.
The elevated level of atmospheric carbon dioxide (CO2) has caused serious concern of the progression of global warming. Geological sequestration is considered as one of the most promising techniques for mitigating the damaging effect of global climate change. Investigations over wide range of length-scales are important for systematic evaluation of the underground formations from prospective CO2 reservoir.
Understanding the relationship between the micro morphology and the observed macro phenomena is even more crucial. Here we show Synchrotron based X-ray micro tomographic study of the morphological buildup of Sandstones. We present a numerical method to extract the pore sizes distribution of the porous structure directly, without approximation or complex calculation. We have also demonstrated its capability in predicting the capillary pressure curve in a mercury intrusion porosimetry (MIP) measurement.
Feifei Yang, Ferdinand F. Hingerl, Xianghui Xiao, Yijin Liu, Ziyu Wu, Sally M. Benson and Michael F. Toney, “Extraction of Pore-morphology and Capillary Pressure Curves of Porous Media from Synchrotron-based Tomography Data,” Nature Scientific Reports, Article Number: 10635. DOI: 10.1038/srep10635, Published Online June 3, 2015.