期刊
CHEMSUSCHEM
卷 9, 期 10, 页码 1134-1145出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201600105
关键词
biomass; catalytic fast pyrolys; heterogeneous catalysts; mesoporous materials; zeolites
资金
- Swiss National Science Foundation [NRP66, 406640-136892]
- European Union (European Social Fund-ESF)
- Greek national funds through the Operational Program Education and Lifelong Learning of the National Strategic Reference Framework (NSRF)-Research Funding Program: THALES
- Swiss National Science Foundation (SNF) [406640_136892] Funding Source: Swiss National Science Foundation (SNF)
Catalytic fast pyrolysis (CFP) of lignin with amorphous mesoporous aluminosilicates catalysts yields a high fraction of aromatics and a relatively low amount of char/coke. The relationship between the acidity and porosity of Al-MCM-41, Al-SBA-15, and Al-MSU-J with product selectivity during lignin CFP is determined. The acid sites (mild Bronsted and stronger Lewis) are able to catalyze pyrolysis intermediates towards fewer oxygenated phenols and aromatic hydrocarbons. A generalized correlation of the product selectivity and yield with the aluminum content and acidity of the mesoporous aluminosilicates is hard to establish. Zeolitic strong acid sites are not required to achieve high conversion and selectivity to aromatic hydrocarbon because nanosized MCM-41 produces a high liquid yield and selectivity. The two most essential parameters are diffusion, which is influenced by pore and grain size, and the active site, which may be mildly acidic, but is dominated by Lewis acid sites. Nanosized grains and mild acidity are essential ingredients fora good lignin CFP catalyst.
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