文献类型：期刊文献

英文题名：The migration and transformation behavior of mercury and sulfur during coal pyrolysis

作者：Yue, Caixia[1,2];Zhu, Yaning[1];Chen, Huijun[1];Wang, Yahui[1,3];Yan, Lunjing[1];Li, Ping[4];Wang, Xingjun[5];Wang, Meijun[1];Chang, Liping[1];Bao, Weiren[1];Wang, Jiancheng[1,3]

机构：[1]Taiyuan Univ Technol, Coll Chem & Chem Engn, State Key Lab Clean & Efficient Coal Utilizat, Key Lab Coal Sci & Technol,Minist Educ, Taiyuan 030024, Peoples R China;[2]Jining Normal Univ, Coll Chem & Chem Engn, Ulanqab 012000, Peoples R China;[3]Taiyuan Univ Technol, Coll Environm & Ecol, Shanxi Key Lab Cpd Air Pollut Identificat & Contro, Jinzhong 030600, Peoples R China;[4]Ningxia Univ, Coll Chem & Chem Engn, State Key Lab High Efffciency Utilizat Coal & Gree, Yinchuan 750021, Peoples R China;[5]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai Engn Res Ctr Coal Gasificat, POB 272, Shanghai 200237, Peoples R China

年份：2025

卷号：395

外文期刊名：FUEL

收录：;EI(收录号：20251418165405);WOS:【SCI-EXPANDED(收录号:WOS:001465653400001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (No. U21A20319 and No. 22308243) .

语种：英文

外文关键词：Mercury; Sulfur; Occurrence; Pyrolysis; Migration behavior

摘要：Currently, the methods of analyzing mercury and sulfur occurrence in coal are not uniform, which makes it difficult to study the migration and transformation behavior of mercury and sulfur during coal pyrolysis. In this study, the mercury and sulfur in coal were simultaneously divided into five forms by sequential chemical extraction procedures. The migration and transformation behaviors of mercury and sulfur during coal pyrolysis were qualitatively and quantitatively analyzed by temperature-programmed pyrolysis combined with an online detection system (mercury analyzer, mass spectrometry, and gas chromatography) and various characterization methods. The results show a significant correlation between mercury and sulfur in the same occurrence form. Hg is mainly associated with FeS2 as a solid solution in sulfide-bound Hg. center dot SH and center dot SO are the main intermediates of H2S, COS, and SO2. The release ratio of mercury is as high as 98.91% at 600 degrees C, while that of sulfur is still less than 50% at 1000 degrees C. Hg0 and H2S are the main gaseous products, accounting for 81.02% and 29.84% of the total mercury and sulfur in coal, respectively. At 700 degrees C, the center dot S generated by organic S decomposition lacks center dot H source, mainly fixed in char in the form of CaS. At 1000 degrees C, inorganic S is converted to organic S, and 26.18% sulfur remains on the surface of char, among which metal sulfide, organic sulfur, and sulfate sulfur account for 5.56%, 16.46%, and 4.16%, respectively. These results provide a theoretical basis for the synergistic directional regulation of mercury and sulfur during thermal conversion.