燃料化学学报2021，Vol.49Issue(4)：436-443,8.DOI:10.1016/S1872-5813(21)60058-0
高分散铁系催化剂对煤加压低温热解过程中硫元素迁移影响
Effects of iron catalyst and atmosphere on sulfur transformation during pressurized low-temperature pyrolysis of Baishihu coal
摘要
Abstract
A vitrinite-rich low rank coal, Baishihu (BSH) coal with moderate sulfur content was treated by dehydration and crushing. The treated samples were pyrolyzed in an alloy tubular reactor under 2 MPa. Influence of iron catalyst and atmosphere on sulfur transformation during pressurized low-temperature coal pyrolysis was investigated. Molecular composition of sulfur compounds in tar was characterized by gas chromatography with sulfur chemiluminescence detector (GC-SCD) combined with Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS). Sulfur K-edge XANES was used to study sulfur molecular structure after pyrolysis. Sulfur compounds in BSH coal are predominantly S1 class species in branch chain of the coal. Elemental sulfur in catalyst enters the tar and forms mercaptan or thioether compounds during pyrolysis. Iron catalyst promotes activation of hydrogen atoms in coal and contributes to hydrogenation saturation and cracking of aromatic sulfide in tar. The catalyst preferentially captures H2S to increase content of pyrite in char and inhibits formation of sulfate. Under H2 atmosphere, significant decrease of thiophene compounds is observed with catalyst coupled with decrease of sulfoxide compounds.关键词
硫转化/傅里叶高分辨质谱/XANES/煤热解/高分散铁系催化剂Key words
sulfur transformation/FT-ICR MS/XANES/coal pyrolysis/iron catalyst分类
化学化工引用本文复制引用
刘敏,王永刚,陈贵锋,史权,HU Yong-feng,赵鹏..高分散铁系催化剂对煤加压低温热解过程中硫元素迁移影响[J].燃料化学学报,2021,49(4):436-443,8.基金项目
The project was supported by Beijing Natural Science Fourdation(BJNSF2182090). （BJNSF2182090）
