Catalytic gasification of coal using eutectic salts: Identification of eutectics Article

cited authors

  • Yeboah, YD; Xu, Y; Sheth, A; Godavarty, A; Agrawal, PK

fiu authors

abstract

  • Different eutectic salt mixture catalysts for the gasification of Illinois No. 6 coal were identified and various impregnation or catalyst addition methods to improve catalyst dispersion were evaluated in this study. In addition, the effects of major process variables such as temperature, pressure, and steam/carbon ratio were investigated in a thermogravimetric analyzer (TGA) and fixed-bed bench scale reactor systems. The TGA studies showed that the eutectic catalysts increased CO2 gasification rate significantly. The methods of catalyst preparation and addition had significant effect on the catalytic activity and coal gasification. Based on the TGA studies of several eutectic systems, the 43.5% Li2CO3-31.5% Na2CO3-25% K2CO3 and 39% Li2CO3-38.5% Na2CO3-22.5% Rb2CO3 ternary eutectics, the 29% Na2CO3-71% K2CO3 binary eutectic and the K2CO3 single salt catalysts were selected for the fixed-bed studies. The catalyst loading increased the gasification rate and almost complete conversion of carbon was observed when 10 wt.% of catalyst was added to the coal. Upon further increasing the catalyst amount to 20 wt.% and above, there was no significant rise in gasification rate. © 2002 Elsevier Science Ltd. All rights reserved.

publication date

  • January 1, 2003

Digital Object Identifier (DOI)

start page

  • 203

end page

  • 214

volume

  • 41

issue

  • 2