Welcome to Biomass Chemical Engineering,

Biomass Chemical Engineering ›› 2020, Vol. 54 ›› Issue (3): 1-8.doi: 10.3969/j.issn.1673-5854.2020.03.001

• Research Report •     Next Articles

Combustion Characteristics and Kinetics Analysis of Rice Husk with Different Pretreatment and Mixing with Poplar Sawdust

Huashan WANG(),Yuren FANG,Tianhang ZHANG,Hua LIU,Chunsheng WANG*()   

  1. College of Vehicles and Energy, Yanshan University, Qinhuangdao 066004, China
  • Received:2019-07-30 Online:2020-05-30 Published:2020-06-13
  • Contact: Chunsheng WANG E-mail:wanghsh@ysu.edu.cn;wangcs@ysu.edu.cn


The thermogravimetric technique was used to analyze the combustion of rice husk(DK) and poplar sawdust(JM). The combustion characteristics and kinetic parameters of different pretreatment methods, heating rates, and the mixing ratio of rice husk and poplar sawdust were investigated.The results showed that water and acid washing could make TG and DTG curves of rice husk combustion shift to higher temperature section, and the maximum weight loss rate and its corresponding temperature increased. Water washing increased the comprehensive combustion index by 2.5×10-7-5.9×10-7%/(min2·℃3) of rice husk, while acid washing decreased it by 11×10-7-11.9×10-7%/(min2·℃3). After different pretreatment, the activation energy of volatile component precipitation and combustion phase was higher than that of the original sample. Compared with the activation energy of the original rice husk in fixed carbon combustion stage, it that of acid washing rice husk reduced 16.94 kJ/mol and that of water washing sample increased. Increasing the proportion of rice husk, the ignition and burnout temperature of the blend fuel decreased. With the increase of heating rate, the integrated combustion characteristic index and residual rate of the mixed fuel improved.The 70% rice husk and the 30% poplar sawdust blended fuel produced a synergistic effect at a heating rate of 40 ℃/min.

Key words: rice husk, thermogravimetric analysis, combustion characteristics, pretreatment, mixing

CLC Number: