准东煤流化床气化中硫、氮的迁移特性研究
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- 英文论文题名：Sulfur and Nitrogen Transformation of Zhundong Coal in a Fluidized Bed Gasifier
- 论文作者：郭学文 ; 张海霞 ; 朱治平
- 英文论文作者：Xuewen Guo ; Haixia Zhang ; Zhiping Zhu ; Institute of Engineering Thermophysics ; Chinese Academy of Sciences ; University of Chinese Academy of Sciences
- 年：2016
- 作者机构：中国科学院工程热物理研究所;中国科学院大学;
- 论文关键词：准东煤 ; 流化床 ; 气化 ; 硫 ; 氮
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第四十六分会：燃烧化学
- 语种：中文
- 分类号：TQ541
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第四十六分会 ; 燃烧化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：116k
- 原文格式：D
- 会议级别：全国
摘要
准东煤田是国内最大的整装煤田,但准东煤碱金属钠含量高,在燃烧过程中极易造成换热面沾污腐蚀。煤气化作为一种洁净煤技术,已经得到广泛的利用。但目前国内对准东煤热解、气化和燃烧过程中碱金属问题研究较多,而对气化过程中硫、氮迁移特性的研究鲜有报道。本文以一种准东煤为研究对象,在自主研制的立式管式炉平台上,以空气为气化剂,考察了高钠煤的气化反应特性;同时通过SEM、XRD、XPS、ICP等方法对气化底渣进行了表征。结果表明:在所研究气化温度下底渣未发生明显结焦;底渣中主要成分为SiO_2和CaS,在1050℃底渣中还发现了少量钠长石;钠的固留率随温度升高呈现先降低后增大的趋势;底渣中硫主要以黄铁矿、噻吩和硫酸盐的形式存在,随气化温度增大,噻吩和硫酸盐减少,黄铁矿增多;底渣中氮主要以吡咯和季氮的形式存在,随气化温度增大,吡咯减少,季氮增多。本研究可为准东煤的大规模开发利用提供理论依据和数据支持。
Zhundong coalfield is the largest intact coalfield in China. However, characterized with high content of sodium, Zhundong coal could induce fouling and slagging problems during the combustion process. Coal gasification technology, as a clean coal technology, is widely used in the world. Many research efforts on alkali metals have been attempted, whereas research on sulfur and nitrogen transformation of Zhundong coal gasification is insufficient. In this study, Zhundong coal gasification characteristics were studied on a novel fluidized bed reactor. The properties of gasification residuals were also investigated. The results show that sulfur morphologies in residuals are pyrite, thiophene and sulphates. Thiophene and sulphates contents increase with gasification temperature, while pyrite decreases. The nitrogen morphologies in residuals are pyrrolic nitrogen and quaternary nitrogen. The quaternary nitrogen increases while pyrrolic nitrogen decreases with rise of gasification temperature. This study will provide basic information for the large-scale utilization of Zhundong coal.
Zhundong coalfield is the largest intact coalfield in China. However, characterized with high content of sodium, Zhundong coal could induce fouling and slagging problems during the combustion process. Coal gasification technology, as a clean coal technology, is widely used in the world. Many research efforts on alkali metals have been attempted, whereas research on sulfur and nitrogen transformation of Zhundong coal gasification is insufficient. In this study, Zhundong coal gasification characteristics were studied on a novel fluidized bed reactor. The properties of gasification residuals were also investigated. The results show that sulfur morphologies in residuals are pyrite, thiophene and sulphates. Thiophene and sulphates contents increase with gasification temperature, while pyrite decreases. The nitrogen morphologies in residuals are pyrrolic nitrogen and quaternary nitrogen. The quaternary nitrogen increases while pyrrolic nitrogen decreases with rise of gasification temperature. This study will provide basic information for the large-scale utilization of Zhundong coal.
引文
[1]Zhou,J.;Zhuang,X.;Alastuey,A.;Querol,X.;Li,J.International Journal of Coal Geology.2010,82(1-2):51-67.
[2]Emami Taba,L.;Irfan,M.F.;Wan Daud,W.A.M.;Chakrabarti,M.H.Renewable and Sustainable Energy Reviews.2012,16(8):5584-5596.
[3]巩志强,夏红德,刘志成,周托,吕清刚.煤炭转化,2016,39(1):86-91.
[2]Emami Taba,L.;Irfan,M.F.;Wan Daud,W.A.M.;Chakrabarti,M.H.Renewable and Sustainable Energy Reviews.2012,16(8):5584-5596.
[3]巩志强,夏红德,刘志成,周托,吕清刚.煤炭转化,2016,39(1):86-91.