The energy penalty of post-combustion CO2 capture & storage and its implications for retrofitting the U.S. installed base
By Kurt Z. House, C. Harvey, M. Aziz, D. Schrag. 2009
278 citations recorded by the source corpus.
A review of the literature has found a factor of 4 spread in the estimated values of the energy penalty for post-combustion capture and storage of CO2 from pulverized-coal (PC) fired power plants. We elucidate the cause of that spread by deriving an analytic relationship for the energy penalty from thermodynamic principles and by identifying which variables are most difficult to constrain. We define the energy penalty for CCS to be the fraction of fuel that must be dedicated to CCS for a fixed quantity of work output. That penalty can manifest itself as either the additional fuel required to maintain a power plant's output or the loss of output for a constant fuel input. Of the 17 parameters that constitute the energy penalty, only the fraction of available waste heat that is recovered for use and the 2nd-law separation efficiency are poorly constrained. We provide an absolute lower bound for the energy penalty of ∼11%, and we demonstrate to what degree increasing the fraction of available-waste-heat recovery can reduce the energy penalty from the higher values reported. It is further argued that an energy penalty of ∼40% will be easily achieved while one of ∼29% represents a decent target value. Furthermore, we analyze the distribution of PC plants in the U.S. and calculate a distribution for the additional fuel required to operate all these plants with CO2 capture and storage (CCS).
Subfields: Environmental Engineering, Global and Planetary Change, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/d915bbd77c349953585a0083d5d17af75d8ce6bb
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In Mechanical Engineering
Citations in the corpus
- Catalysts and adsorbents for CO2 capture and conversion with dual function materials: Limitations of Ni-containing DFMs for flue gas applications (2019, background): “The steps required to transport the captured CO2 to sequestration sites or to be used as feedstock in other reactions (to produce higher value products) makes the overall process economically and logistically unattractive [4,5].”
- Toward solar fuels: photocatalytic conversion of carbon dioxide to hydrocarbons. (2010, background): “’s 1493 coal-fired power plants, representing a power generation capacity of 336 GW, will require an additional 69 92 GW of CO2-free baseload power, or a 15 20% reduction in overall electricity use.(15) Independent of the energy required to bury the CO2 is the question of carbon sequestration leakag”