水蒸气对秸秆气化焦油结构及形成途径的影响  

THE EFFECT OF STEAM ON STRUCTURE CHARACTERIZATION AND FORMATION PATH OF CORNCOB GASIFIED TAR

作　　者：秦育红[1] 冯杰[1] 李文英[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,煤科学与技术省部共建国家重点实验室培育基地,太原030024

出　　处：《太阳能学报》2014年第11期2198-2203,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(21076136;21206104);山西省自然科学基金(2011011005-1);山西省回国留学人员科研项目(2011-034);高等学校博士学科点专项科研基金(20101402110013)

摘　　要：以玉米秸秆在流化床中空气．水蒸气气化所形成的焦油为研究对象，应用凝胶渗透色谱结合光电二极管阵列检测仪（GPC-PDA）分析在800℃和900℃时添加不同量的水蒸气后焦油的分子量分布及其组成结构，焦油在不同温度发生的主要化学反应，进而分析得出秸秆气化焦油的形成途径。研究结果表明：水蒸气添加量的改变不能改变气化焦油的分子量分布及结构特征，在800℃时，秸秆气化焦油主要发生缩合反应，以450-240amu的带／不带共轭侧链的多环芳香族化合物为主要组分。在900℃时，气化焦油以裂解反应为主，分子量小于130amu的化合物在焦油组分中占60％，由1-2环的芳香族化合物或带有氧原子的芳杂环组成，共轭链烃结构较少。In order to study the tar characterization during corncob air-steam gasification, the molecular mass distribution and its structure of tar at 800 ℃ and 900 ℃with the increasing the addition of steam was detected by Gel permeation chromatography coupled with photodiode array detector （GPC-PDA）. The formation path of corncob gasified tar was concluded through research on the chemical reaction during different temperatures. The results showed that molecular mass distribution and structure are unchanged with the addition of steam. The condensation reaction occurred at 800 ℃, the main components are the polyaromatic hydrocarbons with or without conjugated side chains corresponding with the molecular mass 450-240 amu. The cracking reaction is important at 900 ℃. The percentage of compounds with molecular mass less than 130 ainu was 60% or so, the component were aromatic compounds or O-containing aromatic compounds with 1-2 rings, conjugated alkenes are little.

关 键 词：玉米秸秆 空气-水蒸气气化 焦油形成途径 GPC-PDA 

分 类 号：TK6[动力工程及工程热物理—生物能]