期刊
KOREAN JOURNAL OF CHEMICAL ENGINEERING
卷 28, 期 3, 页码 744-750出版社
KOREAN INST CHEM ENGINEERS+
DOI: 10.1007/s11814-011-0019-3
关键词
Cellulose; Propylene Glycol; Aqueous-phase Reforming; H-2; Pt/H-ZSM-5
资金
- Ministry of Knowledge Economy (MKE) of Korea [10033099]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10033099] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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 (NH2-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 H, 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 H, 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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