| Issue |
Korean Journal of Chemical Engineering,
Vol.28, No.3, 744-750, 2011
Vol.28, No.3, 744-750, 2011
Direct conversion of cellulose into polyols or H2 over Pt/Na(H)-ZSM-5
The direct conversion of cellulose into polyols such as ethylene glycol and propylene glycol was examined over Pt catalysts supported on H-ZSM-5 with different SiO2/Al2O3 molar ratios. The Pt dispersion, determined by CO chemisorption and transmission electron microscopy (TEM), as well as the surface acid concentration measured by the temperature-programmed desorption of ammonia (NH3-TPD), increased with decreasing SiO2/Al2O3 molar ratio for Pt/H-ZSM-5. The total yield of the polyols, i.e., sorbitol, manitol, ethylene glycol and propylene glycol, generally
increased with increasing Pt dispersion in Pt/H-ZSM-5. The one-pot aqueous-phase reforming of cellulose into H2 was also examined over the same catalysts. The Pt catalyst supported on H-ZSM-5 with a moderate SiO2/Al2O3 molar ratio and a large external surface area showed the highest H2 production rate. The Pt dispersion, surface acidity, external surface area and surface hydrophilicity appear to affect the catalytic activity for this reaction.
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참고문헌정보(참고문헌, 인용문헌)는 화학공학소재연구정보센터에 의해 제공되고 있습니다.