燃料化学学报Issue(4)：408-413,6.
增压O2/CO2气氛下煤燃烧特性实验研究
Experimental investigation on pressurized coal combustion characteristics under O2/CO2 atmosphere
摘要
Abstract
The pressurized O2/CO2 combustion is a potential technique, which makes CO2 separation and recovery more efficient. However, it has a notably different mechanism from the air combustion and the O2/CO2 combustion under atmospheric pressure. The combustion characteristics of an American bituminous coal and a Huaibei anthracite coal under O2/CO2 atmosphere were studied employing the thermo-gravimetric analyzer at various pressures ( p=0. 1 ~1. 5 MPa). The influences of pressure, oxygen concentration, atmosphere and particle size on the coal combustion characteristics were inspected, and the ignition temperature was obtained. Also, the combustion kinetic parameters were calculated. The results indicate that as the total pressure or oxygen concentration increases, DTG curves move to the low temperature zone and the overall combustion rate of coal samples is accelerated under pressurized O2/CO2 atmosphere. The ignition characteristics of pulverized coal could be improved through the pressure enhancement, the increase of oxygen concentration and the reduction of particle size. The pulverized coal combustion under atmospheric pressure is basically a first order reaction. For pressurized oxy-fuel combustion, the reaction order is 0. 5 under the low temperature zone, while the reaction order becomes 1. 5 under the high temperature zone.关键词
O2/CO2/燃烧特性/压力/热重分析/动力学Key words
O2/CO2/combustion characteristics/pressure/thermo-gravimetric analysis/kinetics分类
化学化工引用本文复制引用
胡海华,段伦博,陈晓平,韩冬,潘玄..增压O2/CO2气氛下煤燃烧特性实验研究[J].燃料化学学报,2014,(4):408-413,6.基金项目
国家重点基础研究发展规划(973计划,2011CB707301)。 （973计划,2011CB707301）
