37. Reaction of Coal Ash with Added Fine Limestone in the Combustion

    • Zhang Lian
    • 中部大学 Department of Applied Chemistry, Collage of Engineering, Chubu University
    • Sato Astushi
    • 中部大学 Department of Applied Chemistry, Collage of Engineering, Chubu University
    • Ninomiya Yoshihiko
    • 中部大学 Department of Applied Chemistry, Collage of Engineering, Chubu University

Abstract

Three coals are subjected to combustion in the drop tube furnace. One kind of limestone, mixed with coal physically, is used for in situ simultaneous removal of SOx and halogen during coal combustion. The results show that SOx and halogen capture ability of added limestone varies with coal type and residence time. At a residence time of about 2.0s and the Ca/S molar ratio of ca. 2.0, a SOx removal of 89% and halogen removal of 50% could be achieved for Yanzhou with high Sulfur, while 50% SOx and 100% halogen removed for the other two coals. SEM-EDX results indicate that part of added calcium reacted with internal minerals to form Ca Al-Silicate or more complex compounds, which significantly decreases the calcium utilization efficiency.

Journal

石炭科学会議発表論文集   [List of Volumes]

石炭科学会議発表論文集 (37), 153-156, 2000-09-28  [Table of Contents]

The Japan Institute of Energy

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Codes

  • NII Article ID (NAID) :
    110006857388
  • NII NACSIS-CAT ID (NCID) :
    AA12293003
  • Text Lang :
    ENG
  • Databases :
    NII-ELS 

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