Release and transformation of sodium during conbustion of Zhundong coals

Release Time:2025-04-30  Hits:

• Date:2025-04-30
• Title of Paper:Release and transformation of sodium during conbustion of Zhundong coals
• Journal:Journal of the Energy Institute
• Summary:Zhundong coalfield is one of the super-huge coalfields newly discovered in Xinjiang Autonomous Region
  of China. Zhundong coal is characterized by high content of sodium. This study deals with the release and
  transformation of sodium during combustion of two Zhundong coals. The volatilization of sodium and
  evolution of its occurrence modes in resultant ash were investigated in a laboratory-scale reactor.
  Experimental results show that sodium is the principal alkali metal and water-soluble sodium is the
  predominant chemical form in Zhundong coals. Combustion temperature has a pronounced effect on the
  release and transformation of sodium. The fraction of water-soluble sodium in residual ash decreases
  significantly and more HCl-soluble form is generated with the increase of combustion temperature. The
  tendency of ash deposition during coal combustion is closely related to occurrence mode of alkali metals.
  In addition, halite (NaCl) is clearly present in ash of Zijin coal at low temperature, while most sodium in
  form of NaCl is released into gas phase and the remainder is transformed into aluminosilicates with
  increasing temperature. Chlorine has a significant influence on transformation of sodium and NaCl(g) is
  the main form of sodium volatized from coal between 600 and 800 °C.
• Co-author:Guangyu Li, Chang'an Wang, Yu Yan, Xi Jin, Yinhe Liu, Defu Che
• Translation or Not:No
• Date of Publication:2015-02-11