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<p>Carbon capture and utilization (CCU) plays a pivotal role in mitigating carbon dioxide emissions by converting captured CO<sub>2</sub> into valuable products. However, conventional CCU technologies face significant challenges, including high energy consumption and substantial financial costs. In contrast, integrated carbon capture and utilization (ICCU) can reduce the large energy consumption associated with the CCU process. Although several CCU methods have been explored in existing literatures, a comprehensive techno-economic analysis and life cycle assessment (LCA) are still needed to fully evaluate the economic and environmental feasibility of integrated processes. This study performs a detailed economic and environmental assessment of three distinct scenarios for methane production. The results demonstrate that the ICCU scenario utilizing a single reactor offers the most cost-effective option for methane production, with a production cost of 892.9 USD/t. Furthermore, the economic benefits of the steam and carbon taxes can further reduce the methane production cost to 717 USD/t, which is close to the market price. Economic viability is highly sensitive to the hydrogen price: parity with market methane is contingent on very low-cost, low-carbon H<sub>2</sub>. Additionally, the ICCU scenario with a single reactor exhibits the lowest environmental impact, with a net global warming potential (GWP) of − 4370&#xa0;kg CO<sub>2</sub>-eq per 1 t CO<sub>2</sub> in flue gas, underscoring its potential as a sustainable and economically viable solution for methane production.</p> Graphical abstract <p></p>

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Techno-economic analysis and life cycle assessment of integrated carbon capture and methanation using Ni/MgO/Al2O3 dual functional material

  • 期刊论文

  • 发表日期：

    2026年1月13日

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  • Muhammad Saddam Hussain,
  • Yaozu Wang,
  • Bocheng Yu,
  • Yongqing Xu,
  • Haiyang Liu,
  • Muhammad Junaid Aslam,
  • Qinghai Li,
  • Yanguo Zhang,
  • Shaoguang Feng,
  • Xuan Bie,
  • Hui Zhou

摘要

Carbon capture and utilization (CCU) plays a pivotal role in mitigating carbon dioxide emissions by converting captured CO2 into valuable products. However, conventional CCU technologies face significant challenges, including high energy consumption and substantial financial costs. In contrast, integrated carbon capture and utilization (ICCU) can reduce the large energy consumption associated with the CCU process. Although several CCU methods have been explored in existing literatures, a comprehensive techno-economic analysis and life cycle assessment (LCA) are still needed to fully evaluate the economic and environmental feasibility of integrated processes. This study performs a detailed economic and environmental assessment of three distinct scenarios for methane production. The results demonstrate that the ICCU scenario utilizing a single reactor offers the most cost-effective option for methane production, with a production cost of 892.9 USD/t. Furthermore, the economic benefits of the steam and carbon taxes can further reduce the methane production cost to 717 USD/t, which is close to the market price. Economic viability is highly sensitive to the hydrogen price: parity with market methane is contingent on very low-cost, low-carbon H2. Additionally, the ICCU scenario with a single reactor exhibits the lowest environmental impact, with a net global warming potential (GWP) of − 4370 kg CO2-eq per 1 t CO2 in flue gas, underscoring its potential as a sustainable and economically viable solution for methane production.

Graphical abstract