Renewables versus Carbon Capture and Storage

ISIS Press Release 11/07/08

A study commissioned by the German federal government finds carbon capture and storage emits ten to forty times as much greenhouse gases as wind or solar energy and gives no protection against the rising cost of fossil fuels Dr. Mae- Wan Ho

The study commissioned by the German federal government and led by researchers at the German Aerospace Center in Stuttgart compared carbon capture and storage (CCS) with renewable energy technologies using a combined lifecycle analysis and cost assessment for Germany [1].

The results show that per KWh of electricity generated, CCS cuts CO2 emissions by 72-90 percent, and total greenhouse gas emissions by 65-79 percent, assuming that the technology works as planned and the geologically stored CO2 does not leak out at all; any leakage would compromise the mitigating potential of CCS. However, the net emissions from CCS are still 10 to 40 times those from renewable energies such as solar and wind (see Figs. 1 and 2).

The difference between CO2 and greenhouse gas emissions comes from the methane released when coal is mined; and methane has a global warming potential about 20 times that of CO2. If companies take steps to prevent the release of methane and capture it for use in combined heat and power generation plants, then the advantage gained is equivalent to fitting CCS for lignite power plants.

Read the rest of this article here
//www.i-sis.org.uk/RenewablesVersusCarbonCapture.php

Or read other articles on Climate Change
//www.i-sis.org.uk/climateglobalwarming.php



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