96/00256 Characterization of ash and char formations in advanced high temperature particulate filtration systems

Abstract

This chapter discusses the synergistic effects of coprocessing originated from interactions between coal and heavy oil. In a study described in the chapter, mixtures of Japanese Taiheiyo coal and Athabasca oil sand bitumen (AOB) with different coal concentrations were used as feeds. The results of the coprocessing reactions of mixtures with different coal concentration are shown. Although the original AOB contained no benzene insoluble fraction (BI), BI was produced with 5 wt% yield after the reaction of pure AOB. A mixture containing 2 wt% coals produced larger amount of HS and smaller amount of BI than the reaction of pure AOB. The addition of a small amount of Taiheiyo coal to AOB resulted in synergistic oil production by suppressing retrogressive reactions, similarly to a mixture of Forestburg Subbituminous C coal and Cold lake vacuum bottoms. With an increase in the coal concentration, the hexane soluble yield decreased, accompanied by an increase in the BI yield. Degree of hydrogen consumption for mixtures containing less than 25 wt% coal was relatively small while a serious increase was observed for mixtures containing more than 30 wt% coal.