Assessment of carbon capture, utilization and storage for gasendal. A techno-economic analysis for the pre-feasibility study of CCUS for a biogas upgrading plant
Typ
Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Program
Sustainable energy systems (MPSES), MSc
Publicerad
2023
Författare
Sagastuy Brena, Sergio
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
In order to meet the goals set in the Paris Agreement and the stringent CO2 emis sion level targets set in Sweden, there is an urgent need to increase the amount of
CO2 utilization and storage.
This thesis presents a techno-economic analysis of CO2 liquefaction and the synthe sis of electro-methanol (e-MeOH) as a CO2 utilization pathway for captured CO2
from Gasendal, a biogas upgrading plant. The processes are implemented and sim ulated in Aspen Plus to extract important parameters and calculate capital and
operational costs as key performance indicators.
The results show that liquefaction costs 34 €/tonCO2 for Gasendal, which is ap proximately 80% higher than shown in other studies. However, when increasing the
plant size to 1M tonCO2/year, the cost decreases to 10 €/tonCO2. In terms of heat
recovery potential, the plant could only provide heat to district heating, but the
amount is too small considering no close pipelines.
On the other hand, e-methanol synthesis costs amounted to 1387 €/tonMeOH, with
about 91% of expenses attributed to alkaline water electrolysis for hydrogen gen eration. Given that electrolysis costs pose a limitation and do not decrease with
the scale of the plant in this study, the overall cost of e-methanol synthesis remains
unaffected by the plant’s capacity. Regarding heat recovery, the process is able to
supply 98% of its heating demand and reduce the natural gas consumption in the
existing process at Gasendal by around 43%.
Beskrivning
Ämne/nyckelord
Carbon capture , carbon utilization , liquefaction , electrofuels , negative emissions