燃料化学学报2013，Vol.41Issue(3)：257-264,8.
CO2对褐煤热解行为的影响
Effect of CO2 on pyrolysis behaviors of lignite
摘要
Abstract
The pyrolysis of Huolinhe lignite under CO2 atmosphere was carried out in a thermobalance and a fast heating-up fixed bed reactor. The distribution of gases, char yield and its property such as element, surface structure, FT-IR spectra were analyzed. By this, the effect of CO2 on the pyrolysis behaviors was studied. The results show that CO2 gasification of the nascent char, which destroys the hydrogen-containing char structure, not only promotes cracking of benzene ring and fracture of hydroxyl, methyl and methylene groups etc. , but also weakens the interaction between H and char matrix and increases the H fluidity, leading to the increase in the generation of H radicals. These H radicals can combine with other free radical fragments generated from fracture of the coal macromolecules to produce more volatiles. This will produce the char with a high specific surface and high pore volume and porosity. The introduction of CO2 promotes the coal pyrolysis and generation of volatile, resulting in decrease in char yield and increase in the evolution amount of H2, CO, CH4 and other small molecules hydrocarbons.关键词
CO2气氛/热解行为/半焦性质Key words
CO2 atmosphere/ pyrolysis behaviors/ char property分类
化学化工引用本文复制引用
高松平,赵建涛,王志青,王建飞,房倚天,黄戒介..CO2对褐煤热解行为的影响[J].燃料化学学报,2013,41(3):257-264,8.基金项目
国家自然科学基金(21106173) （21106173）
中国科学院战略性先导科技专项(XDA0705100) （XDA0705100）
中国科学院山西煤炭化学研究所青年人才基金(2011SQNRC01). （2011SQNRC01）
