期刊文献+

Solution of Coal Char-steam Pressurized Kinetic Parameters Based on Atmospheric Thermo Gravimetric Analyzer 被引量:1

Solution of Coal Char-steam Pressurized Kinetic Parameters Based on Atmospheric Thermo Gravimetric Analyzer
下载PDF
导出
摘要 根据文献中气化速率对总压不敏感、对反应气体分压敏感的实验结论,探索利用常压热重实验得到加压动力学参数的便捷方法。采用NETZSCH STA449F3同步热分析仪进行4种煤焦与水蒸气反应的常压热重实验(水蒸气分压pH2O为0.016~0.053 MPa),通过实验数据处理,获得反应速率与温度、水蒸气分压的关系式,分别以 n 级速率方程和Langmuir-Hinshelwood (LH)速率方程表示,并对上述关系式在水蒸气分压为0.057~0.063 MPa 的工况下进行了实验验证。随着水蒸气分压增大,计算结果与实验数据的相对误差逐渐减小。LH速率方程比n级速率方程更适合描述水蒸气分压的作用。水蒸气分压对反应速率的影响程度随水蒸气分压升高而减小。温度对煤焦-水蒸气反应速率的影响程度大于水蒸气分压对反应速率的影响。温度范围较窄时,煤种本身引起的煤焦反应活性变化幅度会超过温度对煤焦反应活性的影响。在不同的温度和水蒸气分压下,煤种的化学反应活性强弱次序会发生变化,某一特定工况下的次序不能未加实验而随意扩展到其他工况。 According to the conclusions in literatures that the gasification rate is sensitive to reactive .gas partial pressure (0-0.4MPa), not total pressure (0-3 MPa), a method to get pressurized kinetic parameters through atmospheric TGA experiments was investigated, which will bring convenience to engineering applications.
出处 《中国电机工程学报》 EI CSCD 北大核心 2013年第32期I0004-I0004,10,共1页 Proceedings of the CSEE
关键词 动力学参数 热重分析仪 蒸汽加压 大气 煤焦 气化速率 分析实验 反应 char-steam reaction pressure thermo gravimeh'ic analyzer (TGA) nth rate equation Langmuir-Hinshelwood (LH)rate equation
  • 相关文献

同被引文献32

  • 1Kajitani S,Hara S,Matsuda H.Gasification rate analysis of coal char with a pressurized drop tube furnace[J].Fuel,2002,81(5):539-546.
  • 2Zhang R,Wang Q H,Luo Z Y,et al.Competition and inhibition effects during coal char gasification in the mixture of H2O and CO 2 [J].Energy & Fuels,2013,27(9):5107-5115.
  • 3Gadsby J,Hinshelwood C N,Sykes K W.The kinetics of the reactions of the steam-carbon system[J].Proceedings of the Royal Society of London.Series A.Mathematical and Physical Sciences,1946,187(1009):129-151.
  • 4Gadsby J,Long F J,Sleightholm P,et al.The mechanism of the carbon dioxide-carbon reaction[J].Proceedings of the Royal Society of London.Series A.Mathematical and Physical Sciences,1948,193(1034):357-376.
  • 5Ollero P,Serrera A,Arjona R,et al.Diffusional effects in TGA gasification experiments for kinetic determination [J].Fuel,2002,81(15):1989-2000.
  • 6Tseng H P,Edgar T F.Combustion behaviour of bituminous and anthracite coal char between 425 and 900℃[J].Fuel,1985,64(3):373-379.
  • 7Kajitani S,Suzuki N,Ashizawa M,et al.CO 2 gasification rate analysis of coal char in entrained flow coal gasifier [J].Fuel,2006,85(2):163-169.
  • 8Muhlen H J,Heek K H,Juntgen H.Kinetic studies of steam gasification of char in the presence of H 2 ,CO 2 and CO[J].Fuel,1985,64(7):944-949.
  • 9Bliek A.Mathematical modeling of a cocurrent fixed bed coal gasifier[D].Druk:Dissertatie Drukkerij Wibro,1984.
  • 10Huang Z M,Zhang J S,Zhao Y,et al.Kinetic studies of char gasification by steam and CO 2 in the presence of H2 and CO[J].Fuel Processing Technology,2010,91(8):843-847.

引证文献1

二级引证文献4

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部