D0L:10.13374.issn1001-053x.2013.11.016 第35卷第11期 北京科技大学学报 Vol.35 No.11 2013年11月 Journal of University of Science and Technology Beijing Nov.2013 脱灰生物质焦的催化气化反应及动力学 张建良12)，李净1,2)，胡正文12)区，付亚清12)，左海滨12) 1)北京科技大学冶金与生态工程学院，北京100083 2)北京科技大学钢铁治金新技术国家重点实验室，北京100083 ☒通信作者，E-mail:huzhengwen1986@l63.com 摘要利用扫描电镜一能谱仪及热重分析仪研究了添加钾盐催化剂的脱灰生物质焦的物理结构、化学成分及其与 CO2的气化反应，并分别采用均相模型和收缩未反应核模型对实验数据进行处理，得到动力学参数.研究发现钾盐对 脱灰生物质焦-CO2气化反应有明显催化作用，可提高整体反应速率，并减少反应时间.随着钾盐的增加（质量分数在 0%~4%的范围内)，附着在生物质焦表面的富钾催化点增多，催化作用逐渐增大，反应的活化能逐渐降低.由于（脱灰） 生物质焦的灰分含量很低，与未反应核模型相比，均相模型更适合于描述生物质焦-CO2的气化反应过程. 关键词生物质焦：气化：催化：动力学 分类号T℉053：TQ541 Catalytic gasification reaction and kinetics of deashing biomass char ZHANG Jian-liang2),LI Jing2),HU Zheng-wen2),FU Ya-qing2),ZUO Hai-bvin2) 1)School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:huzhengwen1986@163.com ABSTRACT The physical structure and chemical composition of deashing biomass char coated with potash,as well as its gasification reaction with CO2 were investigated by scanning electron microscopy (SEM)equipped with energy dispersive X-ray spectrometry (EDS)and thermal gravimetry.Experimental data were processed with both the homogeneous model and the shrinking unreacted-core model,and kinetic parameters were obtained for the gasification reaction.It is found that there is an obvious catalytic effect of potash on the gasification reaction.This catalysis improves the overall reaction rate and shortens the reaction time.As the potash content increases from 0%to 4%,more adhering catalytic points,rich in kalium,can be detected on the biomass char surface,and the activation energy of the gasification reaction decreased gradually with increasing potash content.Compared with the shrinking unreacted-core model,the homegeneous model is more suitable for describing the gasification reaction of deashing biomass char with CO2 due to its extremely low ash content. KEY WORDS biomass char;gasification;catalysis;kinetics 生物质资源（废木料、秸秆等）具有分布广、产 等，生物质能应用前景广阔，具有替代石油、煤炭 量大、可再生、碳中性等特点，与传统化石能源相 和天然气等能源的潜力). 比具有巨大的经济、环保优势和社会效益.随着煤 通过气化工艺生产工业燃料气，是煤炭等碳基 炭资源的日趋紧张和环境污染的日益严重，生物质 燃料清洁、高效利用的重要途径，可以为钢铁、 能的高效利用逐渐受到人们的重视1-习.生物质能 电力等行业提供能量来源.气化反应性通常指燃料 的化学转化方法包括直接燃烧、气化、热解和液化 在一定温度条件下与不同气化介质（如CO2、H20 收稿日期：2012-09-11第 35 卷 第 11 期 北 京 科 技 大 学 学 报 Vol. 35 No. 11 2013 年 11 月 Journal of University of Science and Technology Beijing Nov. 2013 脱灰生物质焦的催化气化反应及动力学 张建良1,2)，李 净1,2)，胡正文1,2) ，付亚清1,2)，左海滨1,2) 1) 北京科技大学冶金与生态工程学院，北京 100083 2) 北京科技大学钢铁冶金新技术国家重点实验室，北京 100083 通信作者，E-mail: huzhengwen1986@163.com 摘 要 利用扫描电镜 – 能谱仪及热重分析仪研究了添加钾盐催化剂的脱灰生物质焦的物理结构、化学成分及其与 CO2 的气化反应，并分别采用均相模型和收缩未反应核模型对实验数据进行处理，得到动力学参数. 研究发现钾盐对 脱灰生物质焦 –CO2 气化反应有明显催化作用，可提高整体反应速率，并减少反应时间. 随着钾盐的增加 (质量分数在 0%∼4%的范围内)，附着在生物质焦表面的富钾催化点增多，催化作用逐渐增大，反应的活化能逐渐降低. 由于 (脱灰) 生物质焦的灰分含量很低，与未反应核模型相比，均相模型更适合于描述生物质焦 –CO2 的气化反应过程. 关键词 生物质焦; 气化; 催化; 动力学 分类号 TF053; TQ541 Catalytic gasification reaction and kinetics of deashing biomass char ZHANG Jian-liang1,2), LI Jing1,2), HU Zheng-wen1,2) , FU Ya-qing1,2), ZUO Hai-bin1,2) 1) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 2) State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China Corresponding author, E-mail: huzhengwen1986@163.com ABSTRACT The physical structure and chemical composition of deashing biomass char coated with potash, as well as its gasification reaction with CO2 were investigated by scanning electron microscopy (SEM) equipped with energy dispersive X-ray spectrometry (EDS) and thermal gravimetry. Experimental data were processed with both the homogeneous model and the shrinking unreacted-core model, and kinetic parameters were obtained for the gasification reaction. It is found that there is an obvious catalytic effect of potash on the gasification reaction. This catalysis improves the overall reaction rate and shortens the reaction time. As the potash content increases from 0% to 4%, more adhering catalytic points, rich in kalium, can be detected on the biomass char surface, and the activation energy of the gasification reaction decreased gradually with increasing potash content. Compared with the shrinking unreacted-core model, the homegeneous model is more suitable for describing the gasification reaction of deashing biomass char with CO2 due to its extremely low ash content. KEY WORDS biomass char; gasification; catalysis; kinetics 生物质资源 (废木料、秸秆等) 具有分布广、产 量大、可再生、碳中性等特点，与传统化石能源相 比具有巨大的经济、环保优势和社会效益. 随着煤 炭资源的日趋紧张和环境污染的日益严重，生物质 能的高效利用逐渐受到人们的重视 [1−2] . 生物质能 的化学转化方法包括直接燃烧、气化、热解和液化 等，生物质能应用前景广阔，具有替代石油、煤炭 和天然气等能源的潜力 [3] . 通过气化工艺生产工业燃料气，是煤炭等碳基 燃料清洁、高效利用的重要途径 [4]，可以为钢铁、 电力等行业提供能量来源. 气化反应性通常指燃料 在一定温度条件下与不同气化介质 (如 CO2、H2O 收稿日期：2012-09-11 DOI:10.13374/j.issn1001-053x.2013.11.016