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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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fe对胜利褐煤焦结构和气化反应性能的影响
, PP. 554-559
Keywords: 煤焦结构,fe催化剂,活性位,拉曼光谱,程序升温脱附
Abstract:
？酸洗褐煤负载不同含量的fe催化剂在固定床反应器上进行热解,然后采用ft-ir、ramanspectra、tpd和tg研究fe催化剂对煤焦官能团、碳微晶结构、表面活性位和气化反应性的影响。ft-ir结果表明,催化热解作用下煤焦中-oh、-ch3、-ch2活性官能团数量增加。raman光谱测试结果显示,随着fe含量的增加,ig/iall由0.095减少到0.087,id3/iall由0.090增加至0.097,表明在fe催化作用下部分大芳香环结构转变为小芳香环结构。tpd实验结果表明,活性位数量随着煤焦中fe含量升高而不断增加。在3%含fe量时煤焦活性位数量随着吸附温度的升高而增加,800℃后煤焦表面活性位数量开始降低。750℃条件下co2吸附量随着吸附时间的延长而增加,45min后煤焦达到饱和吸附状态。煤焦-水蒸气等温气化实验表明,煤焦气化反应性与活性位数量有密切的关系,fe催化剂主要通过增加煤焦表面活性位数量提高煤焦气化反应性。
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