(96e) Enhancing Direct Air Capture and Utilization (DACCU) Pathways through Life Cycle Assessment, Cost Analysis, and Optimization | AIChE

(96e) Enhancing Direct Air Capture and Utilization (DACCU) Pathways through Life Cycle Assessment, Cost Analysis, and Optimization

Authors 

Badger, N. - Presenter, The University of Alabama
Amini, S., SINTEF
The urgency of climate change calls for innovative carbon management strategies. Direct Air Capture and Utilization (DACCU) emerges as a crucial solution for reducing atmospheric CO2 levels while supplying valuable feedstocks for various industrial applications. This study focuses on optimizing key DACCU pathways: the production of formic acid, Fischer-Tropsch Synthesis products, liquid CO2, and methanol. These pathways are evaluated for their potential to contribute to carbon sequestration and utilization efforts.

Life Cycle Assessment (LCA) methodology is employed to assess the environmental impacts associated with each DACCU pathway. The analysis covers energy requirements, greenhouse gas emissions, and potential environmental tradeoffs, offering a holistic perspective on the sustainability of each process. Additionally, detailed costing information is presented to better understand the economic feasibility and market competitiveness of these technologies.

Mixed-integer linear programming model is used to investigate future pathways for direct air capture and CO2utilization with a focus on costs and carbon reduction. The system is optimized on the whole supply chain costs and on a number of environmental objectives using the U.S. as an example.

The outcomes of this study provide valuable insights for a wide range of stakeholders, including industry leaders and policymakers. It emphasizes the importance of advanced DACCU pathways in addressing climate change, supported by thorough LCA results, cost analyses, and optimization strategies. This comprehensive approach brings to the forefront the need for more sustainable and economically viable carbon capture and utilization practices.