Liquid CO₂-Capture Technologies: A Review

Area of Science:

• Environmental Science
• Chemical Engineering
• Materials Science

Background:

• Rising global carbon dioxide (CO2) emissions necessitate advanced CO2 capture technologies.
• Liquid absorbents are favored for their flexibility and recyclability but face issues like corrosion and pollution.
• Optimization and innovation in liquid CO2 capture are crucial for climate change mitigation.

Purpose of the Study:

• To review novel liquid absorbents for CO2 capture, focusing on nanofluids.
• To detail the preparation, mechanisms, and influencing factors of nanofluid absorbents.
• To discuss challenges and facilitate comparisons of innovative CO2 capture techniques.

Main Methods:

• Comprehensive literature review of nanofluids and other novel liquid absorbents.
• Detailed discussion on nanofluid preparation and mechanisms.
• Analysis of influencing factors, challenges, and applications of novel absorbents.

Main Results:

• Nanofluids, ionic liquids, amino acids, and phase-change absorbents are presented as innovative liquid CO2 capture solutions.
• Detailed insights into nanofluid properties and performance factors are provided.
• Key challenges including energy loss, environmental impact, and capture performance barriers are identified.

Conclusions:

• Novel liquid absorbents, particularly nanofluids, show significant potential for improving CO2 capture efficiency.
• Addressing challenges related to energy, environment, and performance is critical for widespread application.
• This review provides a comparative overview to guide future research in CO2 capture technology.