Catalytic Pyrolysis of Raw and Thermally Treated Cellulose Using Different Acidic Zeolites.

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Bibliographic Details
Title:	Catalytic Pyrolysis of Raw and Thermally Treated Cellulose Using Different Acidic Zeolites.
Authors:	Srinivasan, Vaishnavi¹, Adhikari, Sushil¹ sza0016@auburn.edu, Chattanathan, Shyamsundar¹, Tu, Maobing², Park, Sunkyu³
Source:	BioEnergy Research. Sep2014, Vol. 7 Issue 3, p867-875. 9p.
Subjects:	Pyrolysis, Cellulose, Biomass, Catalysis, Aromatic compounds
Abstract:	Fast pyrolysis of biomass using zeolite catalyst has shown to be effective in improving aromatic production. This study focuses on aromatic production through catalytic pyrolysis of major biomass constituent i.e., cellulose. Furthermore, cellulose was torrefied to understand torrefaction's effect on pyrolysis products. The influence of SiO/AlO ratios of zeolite (ZSM-5) catalyst on aromatic production during pyrolysis of raw and torrefied cellulose was investigated. Results showed that the catalyst acidity played a pivotal role in eliminating anhydro sugars and other oxygenated compounds while producing more aromatics. The maximum aromatic yield (~25 wt%) was obtained when ZSM-5 with the highest acidity (SiO/AlO = 30) was used, while the lowest yield (7.99 wt%) was obtained when the least acidic catalyst was used (SiO/AlO = 280) for raw cellulose pyrolysis. Torrefaction process showed to have positive effect on the aromatic production from pyrolysis. There were no aromatics produced from pyrolysis of raw cellulose in the absence of catalyst, whereas significant amount of aromatic compounds were produced from both catalytic and noncatalytic pyrolyses of torrefied cellulose. The aromatic hydrocarbons produced from catalytic pyrolysis of torrefied cellulose were 5 % more than those produced from raw cellulose at the highest temperature and catalyst acidity (SiO/AlO = 30). [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	Fast pyrolysis of biomass using zeolite catalyst has shown to be effective in improving aromatic production. This study focuses on aromatic production through catalytic pyrolysis of major biomass constituent i.e., cellulose. Furthermore, cellulose was torrefied to understand torrefaction's effect on pyrolysis products. The influence of SiO/AlO ratios of zeolite (ZSM-5) catalyst on aromatic production during pyrolysis of raw and torrefied cellulose was investigated. Results showed that the catalyst acidity played a pivotal role in eliminating anhydro sugars and other oxygenated compounds while producing more aromatics. The maximum aromatic yield (~25 wt%) was obtained when ZSM-5 with the highest acidity (SiO/AlO = 30) was used, while the lowest yield (7.99 wt%) was obtained when the least acidic catalyst was used (SiO/AlO = 280) for raw cellulose pyrolysis. Torrefaction process showed to have positive effect on the aromatic production from pyrolysis. There were no aromatics produced from pyrolysis of raw cellulose in the absence of catalyst, whereas significant amount of aromatic compounds were produced from both catalytic and noncatalytic pyrolyses of torrefied cellulose. The aromatic hydrocarbons produced from catalytic pyrolysis of torrefied cellulose were 5 % more than those produced from raw cellulose at the highest temperature and catalyst acidity (SiO/AlO = 30). [ABSTRACT FROM AUTHOR]
ISSN:	19391234
DOI:	10.1007/s12155-014-9426-8