A1 Journal article (refereed), original research

Techno-economic assessment of CO2 direct air capture plants

Open Access hybrid publication

Publication Details
Authors: Fasihi Mahdi, Efimova Olga, Breyer Christian
Publisher: Elsevier
Publication year: 2019
Language: English
Related Journal or Series Information: Journal of Cleaner Production
Journal acronym: JCP
Volume number: 224
Start page: 957
End page: 980
Number of pages: 24
ISSN: 0959-6526
eISSN: 1879-1786
JUFO-Level of this publication: 2
Open Access: Open Access hybrid publication


CO2 direct air capture (DAC) has been increasingly discussed
as a climate change mitigation option. Despite technical advances in the past
decade, there are still misconceptions about DAC's current and long-term costs
as well as energy, water and area demands. This could undermine DAC's
anticipated role in a neutral or negative greenhouse gas emission energy
system, and influence policy makers. In this study, a literature review and
techno-economic analyses of state-of-the-art DAC technologies are performed, wherein,
DAC technologies are categorised as high temperature aqueous solutions (HT DAC)
and low temperature solid sorbent (LT DAC) systems, from an energy system
perspective. DAC capital expenditures, energy demands and costs have been
estimated under two scenarios for DAC capacities and financial learning rates
in the period 2020 to 2050. DAC system costs could be lowered significantly
with commercialisation in the 2020s followed by massive implementation in the
2040s and 2050s, making them cost competitive with point source carbon capture
and an affordable climate change mitigation solution. It is concluded that LT
DAC systems are favourable due to lower heat supply costs and the possibility
of using waste heat from other systems. CO2 capture costs of LT DAC
systems powered by hybrid PV-Wind-battery systems for Moroccan conditions and
based on a conservative scenario, without/with utilisation of free waste heat
are calculated at 222/133, 105/60, 69/40 and 54/32 €/tCO2 in 2020, 2030, 2040
and 2050, respectively. These new findings could enhance DAC's role in a
successful climate change mitigation strategy.

Last updated on 2020-20-03 at 10:03