Efficient High-Purity Hydrogen Production through Aqueous Phase Reforming of Methanol with KOH Enhancement
Key Ideas
- Integration of La-promoted Ni-based catalysts with in-situ CO2 absorption by KOH enhances high-purity H2 production and suppresses undesired by-products formation.
- Alkali addition shifts equilibrium towards forward APRM reaction, increasing methanol conversion, hydrogen yield, and gas phase H2 concentration.
- APRM system with in-situ CO2 absorption by KOH shows lower energy consumption (78.87 kJ/mol-H2) and higher practical application viability.
- Future perspectives include focusing on improving reaction efficiency, reducing energy consumption, recycling alkali, and extending catalyst life for enhanced hydrogen production.
The article discusses an efficient method for high-purity hydrogen production by combining aqueous phase reforming of methanol with in-situ CO2 absorption using KOH. The integration of La-promoted Ni-based catalysts derived from layered double hydroxides with CO2 capture technology led to enhanced hydrogen yield and reduced by-products formation. The addition of alkali into the APRM process significantly increased methanol conversion, hydrogen production rate, and hydrogen concentration in the gas phase product. This shift also improved catalyst stability by suppressing undesired reactions. Energy consumption analysis showed that the APRM system with in-situ CO2 absorption by KOH exhibited lower energy consumption and higher practical application feasibility. The article also explores future perspectives on process development, emphasizing the improvement of reaction efficiency, energy consumption reduction, alkali recycling, and extending catalyst lifespan for better hydrogen production.