Upgrading of Sugar Cane Bagasse by Thermal Processes 10. Catalytic Liquefaction in Aqueous Medium
作者:
Fernando M. Lancas, Marcal A. Ruggiero, Paulo M. Donate,
期刊:
Energy Sources
(Taylor Available online 1999)
卷期:
Volume 21,
issue 4
页码: 309-318
ISSN:0090-8312
年代: 1999
DOI:10.1080/00908319950014795
出版商: Informa UK Ltd
关键词: Alternative Fuels Catalyst Sugar Cane Bagasse Liquefaction
数据来源: Taylor
摘要:
This work presents the results of a study of a process of direct catalytic liquefaction of sugar cane bagasse, in aqueous medium, using different pH values. The experiments were conducted in the absence as well as in the presence of commercial catalysts. In the absence of catalyst, the results showed that the conversion of sugar cane bagasse into liquefied products is not influenced by the pH of the reaction mixture. An increase in the temperature augments the yield of liquefied products. The utilization of different commercial catalysts permits an increase in the yields of liquefied products up to 92.4 % , obtained with 10 % palladium on activated carbon powder as catalyst. The liquefied products were fractionated into eight different chemical classes by preparative liquid chromatography (PLC-8 method). In the absence of catalyst, high conversion yields into light-oils and resins (fractions F1 to F6)was observed only at pH 9. When the catalysts were used (at pH 9 and at 370 C), an important increase (from 29 to 78 %) of resins (fraction F6) was observed. Under this condition, the proportion of asphaltenes and asphaltols (fractions F7 and F8) decreases from 70 to 20 %.
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