Carbon Capture Utilization and Storage in Methanol Production Using a Dry Reforming-Based Chemical Looping Technology

Area of Science:

• Chemical Engineering
• Catalysis
• Green Chemistry

Background:

• Greenhouse gases carbon dioxide (CO2) and methane (CH4) are major environmental concerns.
• Syngas is a crucial intermediate for synthesizing valuable chemicals like methanol.
• Current methods for converting CO2 and CH4 often require high energy input or complex setups.

Purpose of the Study:

• To investigate the Gas Switching Dry Reforming (GSDR) process for efficient conversion of CO2 and CH4 into syngas.
• To demonstrate the feasibility of a chemical looping approach using a single fluidized bed reactor.
• To achieve a syngas composition suitable for methanol production.

Main Methods:

• Utilizing chemical looping technology with alternating reducing and oxidizing gas supplies in a single fluidized bed reactor.
• Implementing a three-step redox cycle involving metal oxide reduction and reoxidation.
• Conducting experimental demonstrations and process simulations using ASPEN.

Main Results:

• Achieved a syngas H2/CO molar ratio between 1 and 2, suitable for methanol synthesis.
• Identified negative effects of pressure on gas conversion efficiency.
• Successfully simulated the integration of the GSDR process into a methanol production plant.

Conclusions:

• GSDR offers an efficient pathway for converting greenhouse gases into valuable syngas.
• The single-reactor, chemical looping approach simplifies the process compared to traditional methods.
• The GSDR process shows promise for integration into existing methanol production facilities.