PYROLYSIS CHARACTERISTICS OF WHEAT STRAW RESIDUE FROM BIOETHANOL PRODUCTION, KLASON LIGNIN AND ORIGINAL WHEAT STRAW USING TG-FTIR TECHNIQUE
Wheat straw residue (WSR) from bioethanol production is an important biomass waste. However, the residue has not been fully used and burned directly. In the study, the pyrolysis behavior has been analyzed using thermogravimetry coupled with Fourier transform infrared spectroscopy (TG-FTIR) technique at the heating rate of 10 °C /min under nitrogen atmosphere. At the same time, the pyrolysis behavior of the WSR was compared with the original wheat straw (OWS) and the Klason lignin (KL) prepared from the WSR under the same conditions. The results show that the pyrolysis peaks are 330.16, 371.38 and 333.96 °C for the WSR, KL and OWS respectively, with the corresponding maximum pyrolysis rates of 0.2838, 0.2868 and 0.8003 mg/min. With the increase of acid insoluble lignin content, the biomass is more difficult to pyrolyze, resulting in more residue at the final temperature. The main volatile compounds detected by FTIR are similar for the three biomasses, including CO2, CO, H2O, CH4, HCHO, CH3OH, hydrocarbon and aromatic compounds. The kinetic studies demonstrate that the reaction order is three for the WSR within the pyrolysis temperature range of 285.13-408.5 °C. Both the KL and OWS exhibit two pyrolysis reaction orders within the corresponding pyrolysis temperature range of 220.30-566.58 °C, and 208.64-428.61 °C. The activation energy and the frequency factor increase with the decrease of acid insoluble lignin content for the three materials.
biomass lignin pyrolysis TG-FTIR technique wheat straw
Peng Hong Liu Yuhuan Zhang Jinsheng Wang Na Hu Zhengrong
Engineering Research Center for Biomass Conversion,Ministry of Education, Nanchang University, Nanchang,330047, China
国际会议
广州
英文
398-401
2010-11-08（万方平台首次上网日期，不代表论文的发表时间）