EFFECT OF PYROLYSIS PRESSURE ON CHAR THERMOPROPERTIES AND MESO-& MACROPORE EVOLUTION

摘要：

The effect of pyrolysis pressure on char structure was investigated in this study. The physical structure of resultant solid char derived from different pretreated pressures and temperatures were analyzed using Accelerated Surface Area Porosimetry and Scanning electron microscopy in depth. SEM image of chars implied that the softening temperature and shrinkage temperature was decreased at high pressure (3.0MPa), it can be concluded that high pressure promotes char thermoproperties, furthermore, it influenced the char pore structure evolution. The N2 sorption of different chars indicated that char obtained at 0.8MPa had the largest adsorption ability due to the promotion of mesopore evolution under pressurized pyrolysis. Other pressurized chars showed the major difference in mesopore volume, which indicated that the pyrolysis pressure influenced the mesopore evolution greatly, while no obvious change was displayed for macropore, even though ambient pressure char showed relative larger macropore volume than pressurized char.

关键词： char morphology pressurized pyrolysis mesopore evolution

作者: Hanping CHEN Fudong JU Haiping YANG Jing WANG Shihong ZHANG Dechang LIU

作者单位: State Key Laboratory of Coal Combustion, Huazhong University of Science & Technology,Wuhan, 430074, China

会议类型: 国际会议

会议名称: 第六届煤燃烧国际会议(The 6th International Symposium on Coal Combustion)

会议地点: 武汉

会议语种:英文

页码: 174-179

在线出版日期: 2007-12-01（万方平台首次上网日期，不代表论文的发表时间）