文献类型：会议论文

英文题名：Kinetic studies on combustion of microalgae under different oxygen concentrations

作者：Xu, Qing[1];Li, Jun[1];Xie, Aixia[1]

机构：[1]Guangdong Ocean Univ, Coll Engn, Zhanjiang, Peoples R China

会议论文集：International Conference on Materials for Renewable Energy and Environment (ICMREE)

会议日期：AUG 19-21, 2014

会议地点：Chengdu, PEOPLES R CHINA

语种：英文

外文关键词：Oxygen concentration; Combustion; TGA; Kinetics

外文摘要：In this paper, the combustion behavior of Chlorella vulgaris (a genus of unicellular green microalgae) was investigated in a thermogravimetric analyzer (TGA) from room temperature to 800 degrees C in O-2/N-2 atmospheres. The effects of different oxygen concentrations (20, 50, 60, 80 vol.%) in the heating rates 20 degrees C.min(-1) on the combustion processes of Chlorella vulgaris had been studied. The results indicated that the combustion processes of Chlorella vulgaris could be divided into three stages. The oxygen concentrations had important effects on the main combustion processes of Chlorella vulgaris. The iso-conversional method involving Flynn-Wall-Ozawa (FWO) and the Kissinger-Akahira-Sunose (KAS) methods were used for the kinetic analysis of the main combustion process. The results indicated that, when the oxygen concentration varied from 20 to 80 vol.%, the value of activation energy increased respectively from 134.03 to 241.04 kJ.mol(-1) by using FWO method and from 134.53 to 242.33 kJ.mol(-1) by KAS method. Moreover, the optimal oxygen concentration for Chlorella vulgaris combustion was 25-35 vol.%.