摘要
利用非等温热重法研究了由津凯褐煤、万泰烟煤、冀中能源无烟煤和骊达宁无烟煤4种煤在不同变质情况下制备所得煤焦的燃烧特性,利用随机孔模型(RPM)、收缩核未反应芯模型和体积模型模拟了煤焦燃烧反应过程.结果表明,煤焦燃烧性能与煤粉变质程度、灰分含量和升温速率有关;降低煤粉灰分含量、提高升温速率能够明显加快煤焦燃烧速率,缩短燃烧时间.动力学计算表明,RPM模型表征煤焦燃烧效果最优,由其所计算的4种煤焦的表观活化能分别为55.74,88.26,84.27和101.30 kJ/mol.
Non-isothermal thermogravimetry was used to study the combustion properties of four kinds of coal char, which were made from Jinkai lignite （JK）, Wanshou bituminous coal （WS）, Jinzhong Energy anthracite （JZ） and Lidaning anthracite （LDN） under different metamorphic conditions respectively, and their combustion reaction process was simulated by using random pore model （RPM）, unreacted shrinking core model and volumetric model. The results show that the combustion properties of prepared coal char are related to metamorphic degree and volatile content of the original coal, and the heating rate. Decreasing the volatile content of coal and increasing the heating rate can lead to faster combustion rate of coal char apparently with shorter combustion time. The kinetic calculation shows that the RPM model is the optimized one to describe the combustion process of coal char, and the apparent activation energy calculated by it for the four kinds of coal char is 55.74, 88.26, 84.27 and 101.30 kJ/mol, respectively.
出处
《过程工程学报》
CAS
CSCD
北大核心
2014年第1期114-119,共6页
The Chinese Journal of Process Engineering
基金
国家973计划资助项目(编号:2012CB720401)
关键词
煤焦
非等温热重法
燃烧特性
动力学模型
coal char
non-isothermal thermogravimetry
combustion property
kinetic model
