Taking cellulose as carbon precursor, four kinds of cellulose pyrochars were prepared at 350 ℃, 550 ℃, 750 ℃, and 950 ℃, respectively. The composition and combustion characteristics of each pyrochar and their mixtures were investigated. The results showed that: 1) With the rise of pyrolysis temperature, the carbon content in pyrochars increased gradually, the contents of hydrogen and oxygen decreased gradually, and the yield of pyrochars reduced as well. 2) The fixed carbon content and high heat value of pyrochars increased and the volatile component contents decreased along with the rise of pyrolysis temperature. 3) Thermogravimetric curves of pyrochars gradually shifted towards higher temperature region with the rise of pyrolysis temperature, the temperatures of ignition, burnout, and peak temperature of DTG curve increased gradually. 4) The carbon fuels with low ignition propensity, high exothermic capacity, wide exothermic range and stable combustion properties could be obtained by appropriate blending of the pyrochars.%选取纤维素作为原料,分别在350℃、550℃、750℃和950℃下热解制备得到4种纤维素热解炭,通过组成和燃烧特性分析分别考察了单组分热解炭及其相互混合得到的炭材料的燃烧特性.结果表明:①随着热解温度的提高,热解炭样品中的碳元素含量逐渐升高,氢和氧元素含量逐渐下降,同时热解炭产率也随之降低;②随着热解温度的提高,热解炭样品中固定碳含量和高位热值逐渐升高,挥发分含量逐渐降低;③热解炭燃烧特性曲线随热解温度提高逐渐往高温区移动,着火温度、燃尽温度、DTG曲线峰值温度均逐渐提高;④将具有不同燃烧特性的纤维素热解炭进行适当的混合,能够得到具有低引燃性、高放热量、宽放热区间且燃烧过程均匀稳定的炭质热源材料.
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