Cost comparison in various CO2 ocean disposal options

Abstract CO 2 ocean disposal is one of several ways proposed to mitigate the greenhouse gas effect. In this paper, we estimate the cost of various CO 2 disposal options. The system consists of a conventional pulverized coal power plant. CO 2 separation using an amine scrubber, liquefaction and transportation. In this investigation, the power plant and the CO 2 separation plant are common. The liquefaction process and transportation systems are different. We evaluate the costs of pipeline, liquid CO 2 tanker for CO 2 lake, liquid CO 2 tanker dispersion, dry ice tanker and CO 2 dispersion by OTEC. The effect of distance between a power plant and the disposal site, plant size, and plant efficiency on the cost for each case is evaluated. Costs of ocean disposal options are estimated about 90 to 180 per tonne of CO 2 avoided. The least cost transportation option is dependent on the distance between power plant and site.