...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Thermal Analysis and Calorimetry >Sulfation behavior of white mud from paper manufacture as SO2 sorbent at fluidized bed combustion temperatures
【24h】

Sulfation behavior of white mud from paper manufacture as SO2 sorbent at fluidized bed combustion temperatures

机译：造纸白浆在流化床燃烧温度下作为SO 2 吸附剂的硫酸化行为

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The calcination characteristics, sulfation conversion, and sulfation kinetics of a white mud from paper manufacture at fluidized bed combustion temperatures were investigated in a thermogravimetric analyzer. Also, the comparison between the white mud and the limestone in sulfation behavior and microstructure was made. Although the white mud and the limestone both contain lots of CaCO3, they are different in the alkali metal ions content and microstructure. It results in a marked difference in sulfation behavior between the white mud and the limestone. The CaO derived from white mud achieves the maximum sulfation conversion of 83% at about 940 °C which is 1.7 times higher than that derived from limestone at about 880 °C. The shrinking unreacted core model is appropriate to analyze the sulfation kinetics of the white mud. The chemical reaction activation energy E a and the activation energy for product layer diffusion E p for the sulfation of the white mud are 44.94 and 55.61 kJ mol−1, respectively. E p for the limestone is 2.8 times greater than that for the white mud. The calcined white mud possesses higher surface area than the calcined limestone. Moreover, the calcined white mud has more abundant pores in 4–24 nm range which is almost optimum pore size for sulfation. It indicates that the microstructure of the white mud is beneficial for SO2 removal.
机译：在热重分析仪中研究了造纸的白泥在流化床燃烧温度下的煅烧特性，硫酸化转化率和硫酸化动力学。另外，对白泥和石灰石的硫酸化行为和微观结构进行了比较。尽管白泥和石灰石都含有大量的CaCO 3 ，但它们的碱金属离子含量和微观结构却有所不同。这导致白泥和石灰石之间的硫酸盐化行为有显着差异。源自白泥的CaO在约940°C时可实现83％的最大硫酸盐转化率，是约880°C的源自石灰石的CaO的1.7倍。收缩的未反应岩心模型适用于分析白泥的硫酸化动力学。白泥硫酸化的化学反应活化能E a 和产物层扩散活化E p 的活化能分别为44.94和55.61 kJ mol -1 < / sup>。石灰石的E p 是白泥的2.8倍。煅烧的白泥比煅烧的石灰石具有更高的表面积。此外，煅烧的白泥在4–24 nm范围内具有更丰富的孔隙，这几乎是硫酸盐化的最佳孔径。说明白泥的微观结构有利于SO 2 的去除。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号