Mechanism of Xylan Pyrolysis by Py-GC/MS

• Published in: Chemical research in Chinese universities Vol. 29; no. 4; pp. 782 - 787
• Main Authors: Wang, Shu-rong, Liang, Tao, Ru, Bin, Guo, Xiu-juan
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.08.2013; State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, P.R.China
• Subjects: Analytical Chemistry; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Inorganic Chemistry; Organic Chemistry; Physical Chemistry; Py-GC; 停留时间; 分解行为; 半纤维素; 木聚糖; 机制; 气体产品; 裂解气相色谱; Xylan; Pyrolysis; Furfural; Py-GC/MS; Acetic acid
• ISSN: 1005-9040; 2210-3171
• DOI: 10.1007/s40242-013-2447-6

In order to investigate the decomposition behavior of hemicellulose, xylan was chosen as the representative of hemicellulose to study the fast pyrolysis on the combination system of analytical pyrolyzer and gas chromatograph coupled with mass spectrometer（Py-GC/MS）. The main condensable products of xylan pyrolysis consisted of acids, al- dehydes, and ketones; while gas products contained CO2, CO, CH4 and H〉 Acetic acid and furfural were the most abun- dant products with the highest contents of 20.11% and 20.24% respectively. While furfural and acetic acid were formed competitively with residence time and temperature increases, the distribution of xylan pyrolysis products did not vary with the residence time and temperature, while the total content of several kinds of products changed a lot. According to the analysis of experimental data, a reaction pathway of xylan decomposition was deduced so as to illustrate the forma- tion mechanism of main products.