It’s often hard to get an idea of the scale at which different technologies are operating. For example, there’s a lot of discussion about Carbon Capture and Sequestration (CCS or ‘clean coal’), though less than there used to be. To get an idea of current and near-future prospects for CCS in the power sector, I went to the Global CCS Institute list of large-scale projects. The site says
Large-scale CCS projects in the power sector are now a reality, demonstrated by:
* The world’s first large-scale power sector CCS project – the Boundary Dam Integrated Carbon Capture and Sequestration Demonstration Project in Canada (CO2 capture capacity of 1 Mtpa) – becoming operational in October 2014
* Commissioning activities on a new-build 582 megawatt (MW) power plant beginning at the Kemper County Energy Facility in Mississippi (US, CO2 capture capacity of 3 Mtpa) with CO2 capture expected to commence in the first half of 2016
* The Petra Nova Carbon Capture Project at the W.A. Parish power plant near Houston, Texas (US, CO2 capture capacity of 1.4 Mtpa) entering construction in July 2014, with CO2 capture anticipated by the end of 2016.
Tactfully ignoring the fact that the Kemper project has turned out to be a disaster, I thought I would scale this against an option that we can all comprehend, shutting down the brown coal power station at Hazelwood. According to this article, Hazelwood generates 15.7 million tonnes of CO2 per annum, or about three times the total from all CCS Power projects now in operation or under construction.
Looking further down the page, there’s a summary of all the CCS projects currently at any stage of consideration anywhere in the world
Globally, there are 14 large-scale CCS projects in operation, with a further eight under construction. The 22 projects in operation or under construction represents a doubling since the start of this decade. The total CO2 capture capacity of these 22 projects is around 40 million tonnes per annum.
There are another 14 large-scale CCS projects at the most advanced stage of development planning, the Concept Definition (or Define) stage, with a total CO2 capture capacity of around 20 million tonnes per annum. A further 15 large-scale CCS projects are in earlier stages of development planning (the Evaluate and Identify stages) and have a total CO2 capture capacity of around 30 million tonnes per annum.
So, if all of these projects were successfully completed, they would offset the emissions of six Hazelwood-sized plants. It gets worse. Many of these projects serve only to reduce the “fugitive” emissions from oil and gas fields, and most rely for their viability on using the captured CO2 in oil fields, to push more oil to the surface (enhanced oil recovery).
It’s time to bury the myth of CCS once and for all.
were implemented on schedule, the impact over the next fifteen years would be negated if we allowed Hazelwood to continue operating over that period.