文献类型：期刊文献

中文题名：水热炭化生物质与煤共热解和共气化特性研究

英文题名：Study on co-pyrolysis and co-gasification of hydrothermal carbonized biomass and coal

作者：何清[1];程晨[1];龚岩[1];丁路[1];于广锁[1,2]

机构：[1]华东理工大学洁净煤技术研究所,上海200237;[2]宁夏大学省部共建煤炭高效利用与绿色化工国家重点实验室,宁夏银川750021

年份：2022

卷号：50

期号：6

起止页码：664

中文期刊名：燃料化学学报

外文期刊名：Journal of Fuel Chemistry and Technology

收录：CSTPCD;;EI(收录号：20223812767190);Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：国家重点研发计划政府间合作项目(2021YFE0108900);上海市浦江人才计划(20PJ1402800)资助。

语种：中文

中文关键词：共热解;共气化;产氢;动力学;协同作用

外文关键词：co-pyrolysis;co-gasification;H2 generation;kinetics;synergistic effect

摘要：煤和生物质共热化学转化有助于当前化石能源系统的低碳化发展。本研究以烟煤和木质生物质为原料,研究煤和生物质共热解和共气化特性,并考察了不同水热炭化温度和生物质掺混比的影响。利用热重分析仪和在线质谱分析共热解和共气化的协同作用和氢气释放特性。采用Model-fitting方法,单独分析热解和气化阶段的整体反应动力学。结果表明,煤和生物质共气化阶段的协同作用显著强于共热解阶段。生物质比例越高,共气化协同作用越明显,水热炭化会削弱共气化的协同作用。共热解过程,H_(2)的产生受抑制。共气化过程可采用一级模型描述,而共热解过程需遵循n级反应模型。未处理的或轻度水热炭化的生物质与煤的混合物,共热解整体活化能和反应级数大于加权平均值,而其共气化的活化能变化趋势相反。重度水热炭化生物质与煤的混合物,共热解和共气化的活化能均接近加权平均值。
The co-thermochemical conversion of coal and biomass can contribute to the low carbonization of current fossil energy system.In this work,the bituminous and lignocellulosic biomass were selected to study the co-pyrolysis and co-gasification of coal and biomass,with the consideration of different hydrothermal carbonization(HTC)temperature and biomass blending ratio.The synergistic effect of co-pyrolysis and co-gasification was analyzed by using the thermogravimetric analyzer,and the H_(2) release property was investigated by the online mass spectrometer.The model-fitting method was adopted to analyze the overall kinetics during pyrolysis and gasification stage,respectively.The results showed that the synergistic effect of coal and biomass in co-gasification stage was much stronger than that in co-pyrolysis stage.The gasification synergy was enhanced with the biomass blending ratio,while the HTC pretreatment could weaken the synergy.The H_(2) production was inhibited during co-pyrolysis.The first-order reaction model could well describe the co-gasification process,while the n-order reaction model was suitable for the co-pyrolysis process.For the blends of raw or the slight HTC biomass and coal,the overall pyrolysis activation energy(Ea)was greater than that calculated by the weighted average,whereas the overall gasification Ea showed the opposite trend.For the blends of the severe HTC biomass and coal,the Ea of co-pyrolysis and co-gasification were both close to the weighted average value.