{"title":"Techno-economic assessment of waste heat-powered direct air capture in the refinery and petrochemical sectors in Saudi Arabia","authors":"Naser Odeh , Raphael W. Apeaning , Feras Rowaihy","doi":"10.1016/j.ccst.2025.100451","DOIUrl":null,"url":null,"abstract":"<div><div>Direct Air Capture (DAC) is increasingly recognized as a critical technology for achieving net-zero emissions, yet its large-scale deployment remains constrained by high energy and operational costs—particularly the need for reliable low-cost source of heat. This study presents a comprehensive technical and economic assessment of integrating DAC with low-grade industrial waste heat across Saudi Arabia’s refinery and petrochemical sectors. Using facility-level data, we estimate that approximately 84 TWh/year of waste heat is available—sufficient to support the capture of up to 42 MtCO₂ annually, offsetting around 34 % of current stationary emissions from these sectors. Our analysis shows that repurposing this underutilized thermal energy could reduce the average levelized cost of DAC (LCOD) for future commercial-scale systems to $148.5 per ton, significantly below current global DAC cost benchmarks. A marginal abatement cost curve reveals that the most cost-effective opportunities are concentrated in large, high-throughput industrial sites, emphasizing the importance of scale, centralized integration, and waste heat clustering. Further, our sensitivity analysis highlights the scale-up exponent, electricity price, and capital cost assumptions as the most influential factors driving cost outcomes. Overall, this study offers a scalable and actionable blueprint for DAC deployment in high-emitting industrial sectors and aligns closely with Saudi Arabia’s Circular Carbon Economy framework and 2060 net-zero target.</div></div>","PeriodicalId":9387,"journal":{"name":"Carbon Capture Science & Technology","volume":"16 ","pages":"Article 100451"},"PeriodicalIF":0.0000,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Carbon Capture Science & Technology","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2772656825000909","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
Direct Air Capture (DAC) is increasingly recognized as a critical technology for achieving net-zero emissions, yet its large-scale deployment remains constrained by high energy and operational costs—particularly the need for reliable low-cost source of heat. This study presents a comprehensive technical and economic assessment of integrating DAC with low-grade industrial waste heat across Saudi Arabia’s refinery and petrochemical sectors. Using facility-level data, we estimate that approximately 84 TWh/year of waste heat is available—sufficient to support the capture of up to 42 MtCO₂ annually, offsetting around 34 % of current stationary emissions from these sectors. Our analysis shows that repurposing this underutilized thermal energy could reduce the average levelized cost of DAC (LCOD) for future commercial-scale systems to $148.5 per ton, significantly below current global DAC cost benchmarks. A marginal abatement cost curve reveals that the most cost-effective opportunities are concentrated in large, high-throughput industrial sites, emphasizing the importance of scale, centralized integration, and waste heat clustering. Further, our sensitivity analysis highlights the scale-up exponent, electricity price, and capital cost assumptions as the most influential factors driving cost outcomes. Overall, this study offers a scalable and actionable blueprint for DAC deployment in high-emitting industrial sectors and aligns closely with Saudi Arabia’s Circular Carbon Economy framework and 2060 net-zero target.