氧气比对锯末在流化床中气化生成焦油性质的影响  

Effect of Oxygen Ratio on Properties of Sawdust Gasification Tar in a Fluidized Bed

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,太原030024

出　　处：《动力工程学报》2014年第7期564-568,共5页Journal of Chinese Society of Power Engineering

基　　金：国家自然科学基金资助项目(21206104;21076136);山西省自然科学基金资助项目(2011011005-1)

摘　　要：在喷动流化床中进行了900℃下樟子松锯末的气化试验,利用凝胶渗透色谱结合二极管阵列检测器(GPC-PDA)以及气质联用分析技术,对不同氧气比下气化所得焦油的性质进行了分析.结果表明:在较高的生物质气化温度下,只增大氧气比能使焦油的产率降低,但并不能使全部焦油裂解,且不会改变气化焦油的相对分子质量及其分布,焦油中主要化合物的结构特征也没有改变,改变的是不同化合物的相对含量;气化焦油具有芳香特性,结构主要以带和不带支链的芳香烃化合物以及含氧的极性小分子化合物为主.Pinus sawdust gasification experiments were carried out in a spout fluidized bed at 900°C,during which the tar properties were analyzed under different oxygen ratios using gel permeation chromatography coupled with a photodiode array detector(GPC-PDA)and gas chromatography-mass spectrometry(GCMS)analytical techniques.Results show that at relatively high gasification temperatures,the tar yield drops with rising oxygen ratio,but not all of the tar will crack into gas;both the relative molecular mass of tar and its distribution remain unchanged;structural features of main compounds in the tar also keep unchanged,but their relative contents change at high temperatures;the gasified tar primarily consists of aromatic compounds with or without sidechains and of small oxygen-containing polar molecular compounds.

关 键 词：生物质气化 流化床 锯末 焦油 氧气比 GPC-PDA 

分 类 号：TK62[动力工程及工程热物理—生物能]