| 192 | 0 | 110 |
| 下载次数 | 被引频次 | 阅读次数 |
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。
Abstract：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 materials pyrolysis(402~566℃) after the acid pickling and alkali metal impregnation.The products of RDF and lignite pyrolysis were mainly light gases of CO,CO2,CH4,H_2O 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 the highest,alkali metal K and Na followed by the peak concentration and the acid pickling lowest.
[1]王临清,李枭鸣,朱法华,等.中国城市生活垃圾处理现状及发展建议[J].环境污染与防治,2015,37(2):106-109.
[2]李延吉,邹科威,姜璐,等.垃圾衍生燃料焚烧污染物排放实验与模拟[J].浙江大学学报(工学版),2014,48(7):1254-1259.
[3]EFIKA E C,ONWUDILI J A,WILLIAMS P T.Products from the high temperature pyrolysis of RDF at slow and rapid heating rates[J].Analytical and Applied Pyrolysis,2014,34:402-410.
[4]SISTER V G,LUGOVOI Y V,KOSIVTSOV Y Y,et al.Catalytic pyrolysis of polymeric mixtures[J].Russian Journal of Physical Chemistry A,2011,85(6):1091-1093.
[5]何立模,胡松,孙路石,等.基于TG-FTIR的生物质内在金属盐催化热解研究[J].工程热物理学报,2014,35(10):2093-2096.
[6]熊杰,周志杰,许慎启,等.碱金属对煤热解和气化反应速率的影响[J],化工学报,2011,62(1):192-198.
[7]CAPABLO J.Formation of alkali salt deposits in biomass combustion[J].Fuel Processing Technology,2016,153:58-73.
[8]WU Dongyin,WANG Yuhao,WANG Yang,et al.Release of alkali metals during co-firing biomass and coal[J].Renewable Energy,2016,96:91-97.
[9]SHEARER C R,PROVIS J L,BERNAL S A,et al.Alkali-activation potential of biomass-coal co-fired fly ash[J].Cement and Concrete Composites,2016,73:62-74.
[10]FATEHI H,LI Z S,BAI X S,et al.Kinetics of alkali metal release during biomass pyrolysis[J].Proceedings of the Combustion Institute,2016,36:2243-2251.
[11]SADDAWI A,JONES J M,WILLIAMS A.Influence of alkali metals on the kinetics of the thermal decomposition of biomass[J].Fuel Processing Technology,2012,104:189-197.
[12]刘成,刘亮,尹艳山,等.TG-FTIR研究垃圾衍生燃料轻质气体析出特性[J].燃烧科学与技术,2017,23:1-7.
[13]余渡江.垃圾衍生燃料(RDF)流化床空气气化特性的实验研究[D].杭州:浙江大学,2014.
[14]HOU S S,CHEN M C,LIN T H,et al.Experimental study of the combustion characteristics of densified refuse derived fuel(RDF-5)produced from oil sludge[J].Fuel,2014,116:201-207.
[15]JAKAB E,MESZARONS E,BORSA J.Effect of slight chemical modification on the pyrolysis behavior of cellulose fibers[J].Analytical and Applied Pyrolysis,2010,87(1):117-123.
[16]牛淼淼,黄亚继,金保昇,等.鼓泡流化床垃圾衍生燃料富氧气化[J].化工学报,2014,65(12):4971-4977.
[17]桑圣欢,段钰锋,陈惠超,等.热重-红外联用分析纸厂废弃塑料的热解特性[J].环境科学与技术,2013,36(2):159-163.
[18]翁诗甫.傅里叶变换红外光谱分析[M].北京:化学工业出版社,2010.
[19]车德勇,孙艳雪,孙佰仲,等.木质素热解气相产物释放特性实验研究[J].中国电机工程学报,2015,35(24):6439-6444.
[20]刘金淼,马欣欣,黄燕,等.碱/碱土金属浸渍对酸洗生物质热解影响研究[J].北京化工大学学报(自然科学版),2015,42(5):25-31.
[21]MANYA J J,GARCIA-CEBALLOS F,AZUARA M,et al.Pyrolysis and char reactivity of a poor-quality refuse-derived fuel(RDF)from municipal solid waste[J].Fuel Processing Technology,2015,140:276-284.
[22]赵淑蘅,蒋剑春,孙云娟,等.稻壳与褐煤共热解过程的TG-FTIR分析[J].煤炭转化,2013,36(1):19-23.
[23]车德勇,蒋文强.基于TG-FTIR分析的稻壳热解特性实验[J].中国农机化学报,2016,37(5):241-247.
[24]白小元,车德勇,蒋文强,等.纤维素热解的TGFTIR分析[J].可再生能源,2015,33(10):1582-1588.
[25]柏继松,余春江,吴鹏,等.热重-红外联用分析垃圾衍生燃料的热解特性[J].化工学报,2013,64(3):1042-1048.
[26]YANG Haiping,YAN R,CHEN Hanping,et al.Characteristics of hemicellulose,cellulose and lignin pyrolysis[J].Fuel,2007,86(12-13):1781-1788.
基本信息:
DOI：10.16152/j.cnki.xdxbzr.2017-08-011
中图分类号:X705
引用信息:
[1]刘成,刘亮,尹艳山,等.碱金属浸渍对垃圾衍生燃料与褐煤共热解催化特性[J].西北大学学报(自然科学版),2017,47(04):533-538.DOI:10.16152/j.cnki.xdxbzr.2017-08-011.
基金信息:
国家自然科学基金资助项目(51206012)
2017-08-25
2017-08-25