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用XPS研究新西兰高硫煤热解过程中氮、硫官能团的转变规律

李梅 ,  杨俊和 ,  张启锋 ,  常海洲 ,  孙慧

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引用本文: 李梅, 杨俊和, 张启锋, 常海洲, 孙慧. 用XPS研究新西兰高硫煤热解过程中氮、硫官能团的转变规律[J]. 燃料化学学报, 2013, 41(11): 1287-1293. shu
Citation:  LI Mei, YANG Jun-he, ZHANG Qi-feng, CHANG Hai-zhou, SUN Hui. XPS study on transformation of N- and S-functional groups during pyrolysis of high sulfur New Zealand coal[J]. Journal of Fuel Chemistry and Technology, 2013, 41(11): 1287-1293. shu

用XPS研究新西兰高硫煤热解过程中氮、硫官能团的转变规律

    通讯作者: 杨俊和,Tel:021-55270632,E-mail:jhyang@usst.cn。
  • 基金项目:

    国家自然科学基金(21276156)。 (21276156)

摘要: 选择一种高硫新西兰煤(NXL)作为研究对象,高纯Ar气氛中,以5℃/min的升温速率在管式炉中热解,热解终温为300~1 000℃。用XPS研究煤及不同温度下半焦中氮、硫的赋存形态。将N 1s谱图用Lorentzian-Gaussian拟合分为四个峰:N-6(398.8±0.4)eV、N-5(400.2±0.3)eV、N-Q(401.4±0.3)eV和N-X(402.9±0.5)eV;S 2p谱图分为六个峰:硫铁矿(162.5±0.3)eV、硫化物(163.3±0. 4)eV、噻吩(164.1±0.2)eV、亚砜(166.0±0.5)eV、砜(168.0±0.5)eV和硫酸盐硫(169.5±0.5)eV。结果表明,煤中氮元素的主要存在形式是吡啶、吡咯、质子化吡啶和氮氧化物;低于600℃,半焦中的氮元素主要以吡啶和吡咯形式存在;随温度的升高,吡咯向吡啶转化;当温度超过900℃,氮氧化物这一形态消失。该煤中的硫以有机硫为主,其中,噻吩硫占50%以上;随着热解温度的升高,煤中的硫铁矿硫逐步转化为无机硫化物,600℃时分解完全。

English

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  • 收稿日期:  2013-04-22
  • 网络出版日期:  2013-06-04
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