Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7153377 | Case Studies in Thermal Engineering | 2018 | 11 Pages |
Abstract
Pyrolysis of corn residue in pellet form and eucalyptus wood in chip form was conducted on a continuously weighing fixed bed reactor acting as a macro thermogravimetric (TG) analyzer with 40â¯Â±â¯1.0â¯g of sample loading under high purity nitrogen environment. Effect of heating rate (5, 10, and 15â¯Â°C/min) was investigated and pyrolysis behaviors of the pellets and wood chips were also compared with those performed on a typical TG analyzer. Experimental results showed that bigger particle size and higher heating rate significantly delayed the pyrolysis reaction, meanwhile the heating rate affected the characteristic temperatures of the pellets and wood chips more than the smaller size. By differential derivative TG technique, the pyrolysis behaviors could be divided into three stages. Within the main stage of pyrolysis process, only a peak could be differentiated clearly in the derivative TG curve, accounted for approximately 67-81% of weight loss. Flynn-Wall-Ozawa method was used to calculate the activation energy against conversion of reaction on the whole temperature domain. It was found that the activation energy values from the macro TG analyzer, which were 60-70 and 59-71â¯kJ/mol with average values of 64 and 62â¯kJ/mol for the pellets and wood chips, respectively, were about four times lower than that obtained from the typical TG analyzer.
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Authors
Thossaporn Onsree, Nakorn Tippayawong, Anqing Zheng, Haibin Li,