碱金属浸渍对垃圾衍生燃料与褐煤共热解催化特性  

Catalytic properties of refuse derived fuel and lignite under pyrolysis impregnated by alkali metals

作　　者：刘成[1] 刘亮[1] 尹艳山[1] 龚千代 艾锦瑾 蔡宜捷 

机构地区：[1]长沙理工大学湖南省可再生能源电力技术重点实验室,湖南长沙410004

出　　处：《西北大学学报（自然科学版）》2017年第4期533-538,共6页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(51206012)

摘　　要：为探究碱金属对垃圾衍生燃料(Refuse Derived Fuel,RDF)与褐煤共热解特性的影响,对样品灰进行X射线荧光光谱(X-ray fluorescence,XRF)分析,并对酸洗及酸洗后碱金属K和Na溶液浸渍样品进行热重红外联用(TG-FTIR)分析。结果表明:RDF与褐煤之间元素组成含量具有较大差异,但主要元素种类没有发生大的波动,主要含有Al,Si,P,S,K,Ca,Ti,Fe等元素。RDF与褐煤质量比为3∶7时的元素组成与褐煤相似。酸洗能去除样品中的无机碳酸盐,酸洗以及碱金属浸渍后将热解过程分为两个阶段:生物质组分热解(173~433℃)和塑料类物质热解(402~566℃)。RDF与褐煤共热解产物主要为轻质气体(CO,CO2,CH4,H2O)及半挥发性有机物(C=O和C—O—C)。碱金属K和Na的催化作用是RDF与褐煤产生协同反应的原因。气体产物FTIR析出曲线中原样气体峰值浓度最高,碱金属K和Na浸渍样气体峰值浓度次之,酸洗样气体峰值浓度最低。In order to study the effects of metal ions on the co-pyrolysis characteristics of Refuse Derived Fuel and lignite, X-ray fluorescence analysis was performed on the sample of ash, and the TG-FTIR analysis of the pickling solution and the solution of alkali metal K and Na after pickling was carried out. The results showed that the content of elements between RDF and lignite was quite different, while the main elements of the type were not large, mainly containing Al, Si, P, S, K, Ca, Ti, Fe and other elements. When the ratio of RDF to lignite was 3： 7, the element was similar to that of lignite. Inorganic carbonates could be removed by pickling. The process of pyrolysis could be divided into biomass components pyrolysis（ 173 -433 ℃ ） and plastic materi- als pyrolysis（402 -566℃ ） after the acid pickling and alkali metal impregnation. The products of RDF and lig- nite pyrolysis were mainly light gases of CO, CO2,CH4, H2O and the semi-volatile organic compounds of C=O and C-O-C. The catalytic effect of alkali metal K and Na was the reason for synergistic reaction betweenRDF and lignite. From the FTIR of gas precipitation curve, the peak gas concentration of the original was thehighest, alkali metal K and Na followed by the peak concentration and the acid pickling lowest.

关 键 词：垃圾衍生燃料 褐煤 热解 热重红外联用 碱金属 

分 类 号：X705[环境科学与工程—环境工程]