Recent advances in CO₂ capture and mineralization using layered double hydroxide-based materials: A review

Area of Science:

• Materials Science
• Environmental Science
• Chemical Engineering

Background:

• Continuous CO2 emissions cause severe environmental issues.
• Layered double hydroxides (LDHs) are emerging as effective materials for CO2 capture.
• A gap exists in comprehensive reviews specifically on LDH-based CO2 capture.

Purpose of the Study:

• To provide a thorough review of recent advancements in CO2 capture using LDH-based materials.
• To analyze and condense dispersed information on LDH utilization for CO2 capture and mineralization.
• To highlight limitations, challenges, and future research directions in this rapidly evolving field.

Main Methods:

• Review of synthesis protocols for LDH-based materials.
• Analysis of CO2 capture mechanisms using various LDH forms (pristine, calcined, impregnated, composites, functionalized).
• Evaluation of process conditions (temperature, pressure, humidity, gas composition) affecting CO2 capture performance.

Main Results:

• LDH-based materials exhibit tunable properties, high surface area, and excellent CO2 adsorption capabilities.
• Synthesis methods, post-treatments, and functionalization significantly impact CO2 capture efficiency.
• Process parameters critically influence the performance of LDHs in CO2 capture.

Conclusions:

• LDH-based materials are highly promising for efficient CO2 capture.
• Further research is needed to address existing challenges and knowledge gaps.
• Optimizing synthesis and process conditions will enhance the practical application of LDHs for CO2 capture.