HYDRODEOXYGENATION OF O-CONTAINING POLYCYCLIC MODEL COMPOUNDS USING ANOVEL ORGANOMETALLIC CATALYST-PRECURSOR

Compounds containing oxygen functional groups, especially phenols, are undesirable components of coal-derived liquids. Removal of these comp ounds from the products of coal liquefaction is required. A beneficial alternative would be the removal of these compounds, or the preventio n of their formation, during the liquefaction reaction itself, rather than as a separate processing step. A novel organometallic catalyst pr ecursor containing-Co and Mo has been studied as a potential hydrogena tion catalyst for coal liquefaction. To ascertain the hydrodeoxygenati on activity of this catalyst under liquefaction conditions, model comp ounds were investigated. Anthrone, 2,6-di-r-butyl-4-methyl-phenol, din aphthyl ether, and xanthene were reacted in the presence of the Go-Mo catalyst precursor and a precursor containing only Mo over a range of temperatures, providing a comparison of conversions to deoxygenated pr oducts. These conversions give an indication of the hydrodeoxygenating abilities of organometallic catalyst precursors within a coal liquefa ction system. For example, at 400 degrees C dinaphthyl ether was conve rted 100% (4.5% O-containing products) In the presence of the Go-Mo or ganometallic precursor, compared to 76.5% conversion (7.4% O-products) in the presence of the Mo catalyst.