Browsing by Author "Alhazmi, Abdulrahman"

Now showing 1 - 1 of 1

Restricted
Technoeconomic Performance Analysis of DAC: Case Studies in California and Scotland
(The University of Edinburgh, 2024-08-19) Alhazmi, Abdulrahman; Hannah Chalmers
Direct Air Capture (DAC) technologies, particularly those utilizing liquid sorbent systems, are increasingly recognized as essential tools for mitigating global climate change. However, their economic feasibility is highly sensitive to various input parameters. This study developed a comprehensive generic DAC model to identify the most significant input parameters affecting techno-economic performance, with a specific focus on CO₂ capture efficiency, capital expenditure (CAPEX), carbon pricing, and the annual growth rate of carbon prices. Detailed sensitivity analysis identified CAPEX and CO₂ capture efficiency as the most critical determinants of DAC economic performance. Enhancing CO₂ capture efficiency significantly reduced the Levelized Cost of CO₂ Capture (LCOC) from $151.43/ton to $125.50/ton, while a 20% increase in CAPEX drastically lowered the Internal Rate of Return (IRR) by up to 413%. The model was validated through case studies in California and Scotland. Results revealed that California’s favourable conditions—such as a lower fixed charge factor, higher carbon price growth, and a more aggressive annual growth rate—yield superior economic outcomes, including a Net Present Value (NPV) of $102.9 million and an IRR of 19%. In contrast, Scotland, despite its higher carbon price, faced increased CAPEX, leading to less favourable financial performance. The model's LCOC outcomes were validated against existing literature, aligning within the reported range of $94 to $232/ton, confirming its accuracy and relevance. These findings underscore the necessity for region-specific DAC deployment strategies and provide actionable insights for optimizing investments in DAC technologies, thereby supporting global climate mitigation efforts.
19 0