Transport
Once carbon dioxide is captured it has to be transported to the storage site. Pipelines are the dominant mode of transporting CO2, because they provide a constant supply of carbon dioxide without the need for intermediate storage associated with shipping. It is estimated that, within the United States alone, there are already 3,900 miles of CO2 pipelines transporting the carbon dioxide required for enhanced oil recovery operations. Carbon dioxide is transported in the supercritical state, with a density that resembles a liquid and the expansion capability of a gas.
