No.38 天然ソーダ灰-リモナイト複合触媒を用いる低炭化度炭のガス化(ガス化・燃焼・液化(4))

抄録

Steam gasification of low rank coals has been studied with a fixed bed quartz reactor. Composite Na/Fe catalysts prepared by using inexpensive natural soda ash and limonite ore are more active at 700℃ than each component, and the largest char conversion reaches 85% after 1h. The XRD measurements after reaction reveal the transformation of Fe_3O_4 and FeO into FeO and α-Fe as the amount of the soda ash co-loaded increases. The formation of the more highly-reduced Fe species may account for the higher activities of the binary catalysts.