化工进展

• 化工过程与装备 • 上一篇    下一篇

低阶煤与浒苔低温共热解过程分析及动力学

王春霞,何选明,敖福禄,冯东征,曾宪灿,张杜   

  1. 湖北省煤转化与新型碳材料重点实验室,武汉科技大学化学工程与技术学院,湖北 武汉430081
  • 出版日期:2014-11-05 发布日期:2014-11-01

Process analysis and kinetics during co-pyrolysis of low rank coal and enteromorpha

WANG Chunxia,HE Xuanming,AO Fulu,FENG Dongzheng,ZENG Xiancan,ZHANG Du   

  1. Hubei Coal Conversion and New Carbon Materials Key Laboratory,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China
  • Online:2014-11-05 Published:2014-11-01

摘要: 采用自行设计低温干馏装置对不同配比的低阶煤(LRC)和浒苔(EN)进行低温干馏实验,发现在浒苔配入量为30%时,焦油的产率达到最大值11.39%,比煤单独热解提高了28.61%,比理论加权值提高了8.87%。对低阶煤、浒苔及浒苔配入量为30%的混合样进行热重分析,发现低阶煤与浒苔共热解时在240~750℃段存在明显的协同效应,且其相对最大值达18.5%。动力学分析表明,混合热解时活化能与指前因子之间存在补偿效应,两者混合使反应活性增大,反应速率降低,协同作用主要表现在使共热解反应活性增大。

关键词: 低阶煤, 浒苔, 共热解, 动力学, 协同作用

Abstract: The pyrolysis experiments of low rank coal (LRC),enteromorpha (EN) and their blends were performed in a special prolysis equipment. The maximum tar yield of blends was 11.39% with a EN ratio of 30%,which was increased by 28.61% compared to LRC pyrolysis alone and by 8.87% compared to calculated value. Thermogravimetric analysis (TGA) of LRC,EN and their blends indicated significant synergistic effect in the co-pyrolysis process of LRC and EN at 240—750℃. The relative maximum value of synergistic effect was 18.5%. Kinetics analysis showed compensation effect between activation energy and pre-exponential factor of co-pyrolysis. Blending of LRC and EN enhanced reactivity and lowered reaction rate. Synergistic effect mainly was reflected in enhancing the reactivity of co-pyrolysis.

Key words: low rank coal, enteromorpha, co-pyrolysis, kinetics, synergistic effect