es5003764_si_001.pdf (2.21 MB)
Siting Is a Constraint to Realize Environmental Benefits from Carbon Capture and Storage
journal contribution
posted on 2014-10-07, 00:00 authored by Ashok Sekar, Eric Williams, Mikhail ChesterCarbon
capture and storage (CCS) for coal power plants reduces
onsite carbon dioxide emissions, but affects other air emissions on
and offsite. This research assesses the net societal benefits and
costs of Monoethanolamine (MEA) CCS, valuing changes in emissions
of CO2, SO2, NOX, NH3 and
particulate matter (PM), including those in the supply chain. Geographical
variability and stochastic uncertainty for 407 coal power plant locations
in the U.S. are analyzed. The results show that the net environmental
benefits and costs of MEA CCS depend critically on location. For a
few favorable sites of both power plant and upstream processes, CCS
realizes a net benefit (benefit–cost ratio >1) if the social
cost of carbon exceeds $51/ton. For much of the U.S. however, the
social cost of carbon must be much higher to realize net benefits
from CCS, up to a maximum of $910/ton. While the social costs of carbon
are uncertain, typical estimates are in the range of $32–220
per ton, much lower than the breakeven value for many potential CCS
locations. Increased impacts upstream from the power plant can dramatically
change the social acceptability of CCS and needs further consideration
and analysis.