燃料化学学报2017，Vol.45Issue(2)：138-146,9.
氧化反应对胜利褐煤水蒸气气化反应的促进作用Ⅱ.作用机理研究
Promoting effect of oxidation reaction on steam gasification reaction in Shengli lignite gasification processⅡ. Mechanism study
摘要
Abstract
Shengli brown coal was gasified at 800-900 ℃ in a simulated entrained-flow reactor, ψ 80 × 3 000 mm. The physical structure and functional groups of char were tested by infrared spectroscopy, X-ray photoelectron spectroscopy and Raman spectroscopy while coal gas was tested by gas on-line analysis instrument in order to explore the mechanism of promoting effect of oxidation reaction on steam gasification reaction. The results show that the synergy effects can be explained by dissociated adsorption reaction mechanisms of steam gasification reaction and semi-coke pore structure features under different atmospheres. The oxidation reaction can make microspores number, specific surface area, pore volume and adsorption capacity of the char particles greatly increase and more carbon active sites expose by producing microspores, developing mesopores; it also prompts small groups as-CH3 ,-CH2-,>C=O&>C-O-fractured and generation of hydrogen free-radical and carboxyl. All these promote steam gasification reaction rate, especially at a higher water vapor content or temperature. Meanwhile, the oxidation reaction can change the relative content of CO2 , CO, H2 and internal energy of steam molecules and activated carbon atoms, in favor of steam gasification reaction.关键词
温和气化/协同作用/水蒸气气化/微观结构/解离吸附Key words
mild gasification/synergistic effect/steam gasification/pore structure/dissociated adsorption分类
化学化工引用本文复制引用
程相龙,王永刚,孙加亮,申恬,张海永,许德平..氧化反应对胜利褐煤水蒸气气化反应的促进作用Ⅱ.作用机理研究[J].燃料化学学报,2017,45(2):138-146,9.基金项目
The project was supported by the 12th Five-Year Plan of National Science and Technology Support (2012BAA04B02).“十二五”国家科技支撑计划重点项目(2012BAA04B02)资助 （2012BAA04B02）
