Introduction to Geological Sequestration - Introduction to Carbon Capture and Sequestration - page 375

10 years), the footprint of the plume at Sleipner extended over an area of
approximately 5 km 2 .
Summary
In this chapter, we have introduced some of the key concepts in the
geological sequestration of CO 2 . We fi nd that separation of CO 2 from fl ue
gas is essential and that there are four trapping mechanisms for keeping
CO 2 sequestered for geological time scales: stratigraphic or structural,
residual or capillary, solubility, and mineral trapping. Finally, we intro-
duced the types of geological formations that can be used to effectively
store CO 2 , and provided specifi c examples of a few sites that demon-
strate the feasibility. In the following two chapters, we will discuss the
fundamental and practical aspects of geological carbon sequestration.