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纤维素快速热裂解机理试验研究 Ⅰ. 试验研究
引用本文:廖艳芬,骆仲泱,王树荣,余春江,岑可法.纤维素快速热裂解机理试验研究 Ⅰ. 试验研究[J].燃料化学学报,2003,31(2):133-138.
作者姓名:廖艳芬  骆仲泱  王树荣  余春江  岑可法
作者单位:Clean Energy and Environment Engineering Key Laboratory of Ministry of Education, Zhejiang University, Hangzhou 310027, China
基金项目:国家自然科学基金(50176046);国家杰出青年科学基金 (50025618);国家重点基础研究专项经费 (2001CB409600).
摘    要:在热辐射反应器上对纤维素快速热裂解过程中主要一次产物的生成规律进行了研究。结合焦油的GC-MS分析,发现左旋葡聚糖(LG)作为最重要的液体产物,占据了焦油质量的45w%~85w%。LG的生成主要集中在550 ℃~650 ℃中温辐射源区域,其产量随温度的变化存在一最佳值,约在640 ℃左右得到54.4w%的最高产率。乙醇醛(HAA)作为焦油的第二重要组分,在焦油中达到了6w%~14w%的比例,与之含量接近的还有1-羟基-2-丙酮(Acetol),约为3.5w%~8w%。它们的产率在相当大的范围内随温度的升高而增加,表明高温有利于它们的生成。同时分析表明乙醇醛、1-羟基-2-丙酮是在与LG的竞争过程中作为纤维素热裂解一次产物直接生成的。

关 键 词:纤维素  快速热裂解  左旋葡聚糖  热裂解机理  
文章编号:0253-2409(2003)02-0133-06
收稿时间:2002-07-10
修稿时间:2002年7月10日

MECHANISM OF RAPID PYROLYSIS OF CELLULOSE Ⅰ. EXPERIMENTAL RESEARCH
LIAO Yan-fen,LUO Zhong-yang,WANG Shu-rong,YU Chun-jiang,CEN Ken-fa.MECHANISM OF RAPID PYROLYSIS OF CELLULOSE Ⅰ. EXPERIMENTAL RESEARCH[J].Journal of Fuel Chemistry and Technology,2003,31(2):133-138.
Authors:LIAO Yan-fen  LUO Zhong-yang  WANG Shu-rong  YU Chun-jiang  CEN Ken-fa
Abstract:The primary products formation during cellulose pyrolysis was studied using a heat radiation reactor. Combined with GC-MS analysis, Levoglucosan (LG) appeared to be the most important component, and its proportion in bio-oil was about 45w%~85w%. LG was mainly formed at 550 ℃~650 ℃ for the medial temperature of thermal radiation source (TRS). There existed an optimum TRS temperature about 640 ℃ for LG production. Glycolaldehyde and acetol were also the major components, which took up about 6w%~14w% and 3.5w%~8w% in bio-oil separately. However, their production always increased with TRS temperature within a rather wide range, showing that high reaction temperature benefited their formation. Furthermore, glycolaldehyde and acetol were formed in primary reaction competing against LG formation during cellulose pyrolysis, rather than formed from secondary cracking of LG.
Keywords:cellulose  rapid pyrolysis  levoglucosan  reaction mechanism
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