过渡金属添加剂对煤热解脱硫的影响

黄吉庆; 白宗庆; 白进; 郭振兴; 李文

过渡金属添加剂对煤热解脱硫的影响

1.
中国科学院山西煤炭化学研究所煤转化国家重点实验室, 山西太原 030001;
2.
中国科学院研究生院, 北京 100049

基金项目: 国家重点基础研究发展规划(973计划, 2011CB201401)。

详细信息

通讯作者:
白宗庆, 副研究员, 主要从事煤的高效洁净利用研究, Tel:035-4048967, Fax: 0351-4050320, E-mail: baizq@sxicc.ac.cn。

中图分类号: TQ530
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出版历程
- 收稿日期: 2011-09-11
- 修回日期: 2011-12-03
- 刊出日期: 2012-06-30

Effects of transition metal additives on desulfurization of coal in pyrolysis

1.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
2.
Graduate University of Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要: 利用坩埚焦考察了过渡金属添加剂Fe、Cr和Mn的不同形态在焦化过程中对高硫焦煤中硫脱除的影响,并通过固定床热解实验考察了不同气氛下添加剂对煤热解脱硫及含硫化合物逸出的影响。结果表明,不同金属添加剂对煤中硫形态有不同影响,氧化性较高的Fe³⁺降低了煤中黄铁矿硫的含量,而其他金属添加剂对煤中硫形态影响不大。在模拟焦化过程中,铬系添加剂提高了热解脱硫率,而铁系和锰系添加剂降低了脱硫率;负载Cr³⁺的介休煤在不同气氛下的热解表明,氮气抑制了Cr的脱硫作用,显著地减少了含硫气体的生成量,并使煤中易脱除硫转化为稳定的有机硫;还原性气氛有利于Cr³⁺添加剂的脱硫作用,显著地增加了含硫气体的生成量;焦炉气和氢气下添加剂对热解脱硫及煤热解过程中含硫气体逸出的影响相似,焦炉气可以作为提高过渡金属添加剂脱硫性能的反应气体。
- 过渡金属添加剂 /
- 高硫焦煤 /
- 热解 /
- 焦化 /
- 脱硫
Abstract: The effects of different Fe, Cr and Mn additives on the desulfurization of coking coal with high sulfur during coking process were investigated by crucible coke. Also, the effects of the additives on the desulfurization during coal pyrolysis and the evolution of sulfur-containing gases under different atmospheres were examined in a fixed bed reactor. The results indicate that the effects of additives on the sulfur forms of coal are different. Fe³⁺ which has an oxidability decreases the pyrite content of coal while other additives have little effect on the sulfur forms of coal. Chromium additives increase the desulfurization of coal pyrolysis, but iron and manganese additives decrease that during simulated coking process. The pyrolysis of Cr³⁺ loaded Jiexiu coal indicates that the desulfurization of coal with Cr³⁺ under N₂ is restrained and the evolution of sulfur-containing gases is decreased, and the unstable organic sulfurs are converted to stable organic sulfurs; on the other hand, the desulfurization of coal with Cr³⁺ is facilitated under reductive atmospheres and the yield of sulfur-containing gases is obviously increased. The effects of the simulated coke oven gas (SCOG) on the desulfurization of coal with additives and the evolution of sulfur-containing gases during pyrolysis are similar to those of H₂, so SCOG can be used as the reaction atmosphere for increasing the desulfurization during pyrolysis with transition metals additives.
- transition metal additives /
- high sulfur coking coal /
- pyrolysis /
- coking /
- desulfurization

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参考文献(15)

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