[Research Progress on CO₂ Capture, Utilization, and Storage of Fly Ash]

Area of Science:

• Environmental Science and Engineering
• Materials Science
• Chemical Engineering

Context:

• Growing concerns over atmospheric carbon dioxide (CO2) levels and industrial emissions.
• The need for sustainable management and valorization of industrial byproducts like fly ash.
• China's "double carbon" goals driving innovation in CO2 capture and utilization.

Purpose:

• To summarize global research progress on fly ash technologies for CO2 capture, utilization, and storage (CCUS).
• To discuss research opportunities and novel applications of fly ash in CO2 mitigation.
• To explore the potential of fly ash-derived products for CO2 sequestration and utilization.

Summary:

• Fly ash can capture and store CO2 via mineralization (dry, semi-dry, wet methods), reducing heavy metal leaching and improving concrete additives.
• It can be transformed into activated carbon, zeolites, or porous silica for physical CO2 adsorption.
• Fly ash is utilized in building materials, catalysts, catalyst carriers for CO2 chemical processes, and pseudo-boehmite production.

Impact:

• Provides a sustainable pathway for fly ash valorization, transforming waste into valuable products.
• Offers a novel approach to CO2 capture and utilization, contributing to environmental protection and carbon reduction goals.
• Enhances the comprehensive utilization of fly ash from coal-fired power plants, promoting a circular economy.