A1 Journal article (refereed), original research

A method for assessing infrastructure for CO2 utilization: A case study of

Publication Details
Authors: Karjunen Hannu, Tynjälä Tero, Hyppänen Timo
Publisher: Elsevier
Publication year: 2017
Language: English
Related journal or series: Applied Energy
Volume number: 205
Start page: 33
End page: 43
Number of pages: 11
ISSN: 0306-2619
JUFO level of this publication: 2
Open Access: Not an Open Access publication


Synthetic hydrocarbons can be produced sustainably with power-to-gas processes, resulting in a net reduction ofgreenhouse gas emissions due to the substitution of conventional natural gas and other fossil fuels with carbonneutralalternatives. Acquisition of the CO2 for the synthetic fuel production can be implemented in multipleways. This work introduces a node-based model to assess different implementation strategies of CO2 utilizationsystems, taking into account temporal effects, regional variation, and economies of scale for CO2 capture.Intermediate storage volumes, capture costs, transport quantities, and other relevant infrastructural aspects ofthe CCU system can be estimated with the model. Finland is used as a case study, focusing specifically on thenational and regional scale. CO2 capture costs are significant, being nearly four times larger than the cost ofstorage in the baseline scenario (354 M€, 85M€). CO2 sources with smaller annual emissions increases capturecosts by 14% compared to baseline. This increase in cost is comparable to the cost of transporting over a quarterof all captured CO2 to off-site processing (varying distance, 100–400 km). Seasonal storage of CO2 is found to bebeneficial for the cost-efficient production of synthetic fuels, owing to the temporal disparity between CO2 emissions and utilization, as well as the overall cost structure of the components. Five key decision categories areproposed for a carbon utilization system: scale, type, units, location, and technological decisions. These may beapplied to describe any carbon utilization system, helping to form a more comprehensive picture of a futureenergy system, where carbon is widely used as a raw material.

Last updated on 2018-19-10 at 07:55