水蒸气对CO_2/H_2O气氛下煤焦结构的影响研究  

Effects of Steam on the Char Structures Under CO_2/H_2O Atmospheres

作　　者：徐俊[1] 孙志君[1] 熊哲 唐浩 刘佳薇 苏胜[1] 胡松[1] 汪一[1] 许凯[1] 向军[1] 

机构地区：[1]华中科技大学煤燃烧国家重点实验室,武汉430074

出　　处：《工程热物理学报》2017年第11期2467-2471,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51576081;No.51576086)

摘　　要：本文研究了水蒸气对富氧燃烧初始阶段煤焦结构的影响。在固定床上制取不同CO_2/H_2O气氛下煤焦,运用FT-IR/Raman对煤焦结构进行了表征。研究结果表明:水蒸气在富氧燃烧的初始阶段会增加煤焦的质量损失,但其影响程度有限,明显低于其单独存在下的影响;对于煤焦结构,水蒸气的加入会使富氧燃烧初始阶段煤焦芳香化程度明显增加,煤焦的结构更加有序;此外水蒸气的加入会使煤焦中含氧官能团先减少后增加。This study investigated the effects of steam on the char structures in the initial stage of oxy-fuel combustion. Chars were prepared in the fixed bed reactor under different CO2/H20 atmospheres, and characterized by FT-IR/Raman spectrometer. The results indicate that the existence of steam in the atmospheres increases the loss weight of the char in the initial stage of oxy-fuel combustion, but the influence extent is lower than that in the steam atmospheres individually. For the char structures, adding steam in CO2 would increase the aromatization degree of the char significantly in the initial stage of oxy-fuel combustion. Besides the steam would first increase and then decrease the O-containing functional groups in the char under C02/H20 atmospheres.

关 键 词：富氧燃烧 CO2/H2O FT-RAMAN 煤焦结构 

分 类 号：TQ534.9[化学工程—煤化学工程]