石油炼制与化工 ›› 2018, Vol. 49 ›› Issue (4): 82-88.

• 环境保护 • 上一篇    下一篇

NiMo/Al2O3上H2还原脱除烟气中SO2和NO探索

张春城1,薛峰2,武传朋1,郭大为1   

  1. 1. 中国石化石油化工科学研究院
    2. 北京茵泰德科技有限公司
  • 收稿日期:2017-10-10 修回日期:2017-12-04 出版日期:2018-04-12 发布日期:2018-04-26
  • 通讯作者: 张春城 E-mail:2282123660@qq.com
  • 基金资助:
    FCC再生器中NOx的生成机理及其原位CO还原研究;还原法脱除FCC烟气中SOx和NOx技术开发

REMOVAL OF SO2 AND NO FROM FLUE GAS BY HYDROGEN REDUCTION OVER NiMo/Al2O3 CATALYST

  1.  
  • Received:2017-10-10 Revised:2017-12-04 Online:2018-04-12 Published:2018-04-26
  • Contact: Zhang Chuncheng E-mail:2282123660@qq.com
  • Supported by:
     

摘要: 采用连续管式固定床反应器,在压力为常压、反应温度为100~600 ℃、无氧和含氧气氛下考察了NiMo/Al2O3催化剂上H2催化脱除SO2、NO的性能。结果表明:NiMo/Al2O3催化剂具有良好的同时脱硫脱硝的性能,SO2转化率、单质硫选择性均高于单独脱硫或单独脱硝时,但N2生成率低于单独脱硝时,其中SO2转化率随温度的升高而增高,直至达到100%;含氧气氛下的SO2转化率、单质硫选择性、N2生成率整体优于无氧气氛下的结果;SO2的存在对NO的吸附有抑制作用,NO的存在显著提高了SO2转化率和单质硫选择性。

关键词: 还原法, 烟气, 脱硫, 脱硝, 加氢催化剂, 固定床

Abstract: The performance of NiMo/Al2O3 hydrogenation catalyst for removing SO2 and NO in presence of H2 was investigated under conditions of constant pressure, 100-600℃, oxygen/oxygen free atmospheres in a continuous tubular fixed bed reactor. The results showed that NiMo/Al2O3 catalyst has good simultaneous desulfurization and denitration performance. The SO2 conversion,elemental sulfur selectivity are higher than the value of desulfurization and denitration alone, the SO2 conversion increases with the increase of temperature, even as high as 100%, but N2 formation rate is lower than the value of separate denitration. Under oxygen atmosphere conditions,SO2 conversion,elemental sulfur selectivity,N2 yield are all better than that under oxygen free conditions. The presence of SO2 has an inhibitory effect on the adsorption of NO,and the presence of NO significantly improves SO2 conversion and elemental sulfur selectivity.

Key words: reduction, flue gas, desulfurization, denitration, hydrogenation catalyst, fixed-bed

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