热解温度对半焦生成及其元素组成的影响  

INFLUENCE OF PYROLYSIS TEMPERATURE ON THE FORMATION OF SEMICOKE AND ITS ELEMENTAL COMPOSITION

作　　者：叶俊岭[1] 刘生玉[1] 吕永康[1] 

机构地区：[1]太原理工大学煤科学与技术教育部和山西省重点实验室,太原高级工程师030024

出　　处：《煤炭转化》2006年第1期37-40,共4页Coal Conversion

基　　金：国家自然科学基金重点项目(19935010);国家重点基础研究发展规划项目(G1999022106);山西省科技攻关项目(051161).

摘　　要：利用固定床反应器对3种煤样进行了Ar气气氛高温热解研究，考察了热解温度对半焦产率和其中C，H和O元素含量的影响．研究发现，挥发分主要释放温度范围集中在400℃～700℃；半焦的H／C和O／C原子比都是随温度的升高而减小，O／C原子比在300℃～600℃降低幅度很大，H／C原子比在300℃～900℃降幅较大，当热解温度达到900℃后，不同变质程度煤的半焦H／C和O／C趋于一致．热解过程中半焦的H／C和O／C变化关系与vanKrevelen图上典型煤阶的H／C和O／C关系类似．Three coal samples from China were pyrolyzed under Ar atmophere in a fixed bed reactor. The influence of pyrolysis temperature on the formation of char and the content of C, H, O of char produced at different temperature were investigated. The results show that the release of volatiles mainly in temperature range of 400℃-700℃, the decrease of O/C and H/C atomic ratio predominantly occur in 300℃-600℃ and 300℃-900℃ individually ,the H/C and O/C atomic ratio tend to equal when the temperature of pyrolysis reaches 900℃. The relationship of change of H/C and O/C during pyrolysis is similar with van Krevelen diagram of H/C and O/ C of typical coal rank.

关 键 词：热解 半焦 元素组成 

分 类 号：TQ530.2[化学工程—煤化学工程]