Hydroliquefaction of Coal Using Group IVb Organometallic Compounds as a Catalyst Precursor

• Published in: Journal of the Fuel Society of Japan Vol. 66; no. 2; pp. 128 - 133
• Main Authors: SUZUKI, Toshimitsu, YASUHISA, Mitsuo, ANDO, Toshihiro, WATANABE, Yoshihisa
• Format: Journal Article
• Language: English; Japanese
• Published: THE JAPAN INSTITUTE OF ENERGY 1987
• Subjects: Catalyst; Coal liquefaction; Organometallic compound; tetrabutylgermane
• ISSN: 0369-3775; 2185-226X
• DOI: 10.3775/jie.66.128

The catalytic activities of group IVb organometallic compounds for the hydroliquefaction of Wandoan coal were compared. Among the group IVb organometallic compounds tetrabutyl-stannane exhibited the highest catalytic activity followed by tetrabutylgermane and tetraphenyllead. Organosilcon compounds, however, did not show any catalytic activity. Effect of hydrogen partial pressure and the amount of catalyst on the liquefaction yield were more pronouncedly observed for less active Ge and Pb based catalyst. From the change in the product distribution against reaction time, n-Bu 4 Ge based catalyst seems to promote direct paths from coal to preasphaltene, asphaltene, and oil fractions, rather than step wise process such as; Coal→Preasphaltene→Asphaltene Germanium oxide exhibited poor catalytic activity on the hydroliquefaction of the coal. Well dispersed state of metallic Ge or Pb derived from organometallic compounds could be responsible for the higher catalytic activities of organometallic based catalyst.