左旋葡糖
热解
催化作用
蒸汽
糠醛
MCM-41
木质素
醋酸
化学
介孔材料
纤维素
有机化学
呋喃
热重分析
质谱法
化学工程
核化学
无机化学
色谱法
神经科学
气溶胶
工程类
生物
生物质燃烧
作者
Judit Adam,Marianne Blazsó,E. Mészáros,Michael Stöcker,Merete Hellner Nilsen,Aud M. Bouzga,Johan E. Hustad,Morten Grønli,Gisle Øye
出处
期刊:Fuel
[Elsevier]
日期:2005-03-04
被引量:221
标识
DOI:10.1016/j.fuel.2005.02.006
摘要
Al-MCM-41 type mesoporous catalysts were used for converting the pyrolysis vapours of spruce wood in order to obtain better bio-oil properties. Four Al-MCM-41 type catalysts with a Si/Al ratio of 20 were tested. The catalytic properties of Al-MCM-41 catalyst were modified by pore enlargement that allows the processing of larger molecules and by introduction of Cu cations into the structure. Spruce wood pyrolysis at 500 °C was performed and the products were analysed with the help of on-line pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). In addition, thermogravimetry/mass spectrometry (TG/MS) experiments were applied for monitoring the product evolution under slow heating conditions (20 °C/min) from 50 to 800 °C. Levoglucosan is completely eliminated, while acetic acid, furfural and furanes become quite important among cellulose pyrolysis products over the unmodified Al-MCM-41 catalyst. The dominance of phenolic compounds of higher molecular mass is strongly cut back among the lignin products. Both the increase of the yield of acetic acid and furan and the decrease of large methoxyphenols are repressed to some extent over catalysts with enlarged pores. The Cu modified catalyst performed similarly to the catalyst with enlarged pore size in converting the pyrolysis vapours of wood, although its pore size was similar to the unmodified Al-MCM-41.
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