CO₂ Capture-Mineralization for Calcium-Looping Integrated with Methane Dry Reforming

Area of Science:

• Chemical Engineering
• Materials Science
• Catalysis

Background:

• Chemical absorption using monoethanolamine (MEA) is a standard method for postcombustion CO2 capture.
• Efficient regeneration of MEA and direct utilization of captured CO2 are crucial for cost-effective carbon capture and utilization (CCU).

Purpose of the Study:

• To integrate MEA-based CO2 capture with calcium-based mineralization for MEA regeneration.
• To utilize the captured CO2 in a calcium looping-based dry reforming of methane (CaL-DRM) process for syngas production.
• To evaluate the catalytic performance and stability of the developed Ni-Ca material.

Main Methods:

• Room-temperature CO2 capture using MEA followed by regeneration via calcium-based mineralization.
• Synthesis of a Ni-Ca material for the CaL-DRM reaction.
• Testing the CaL-DRM process at 600°C and conducting 10-cycle stability tests.

Main Results:

• Successful room-temperature MEA regeneration using calcium-based mineralization.
• The Ni-Ca material demonstrated activity in converting captured CO2 into syngas via CaL-DRM.
• The Ni-Ca material exhibited excellent operational stability over 10 cycles, with consistent CO2 uptake and syngas yields.

Conclusions:

• The integrated CO2 capture-mineralization and CaL-DRM process is feasible.
• This approach offers a sustainable and energy-efficient pathway for CO2 utilization and syngas generation.
• The developed Ni-Ca material shows promise for stable and efficient catalytic conversion of captured CO2.