Primary coal liquids

Hydrocracking, 30 48-52 behavior, thermal, 29 269 catalytic, 26 383 deethylation, 30 50 demethylation, 30 50 metallocarbene formation, 30 51-52 of f -decane, 35 332-333 primary coal liquids, 40 57 procedure, 40 66-67 product distribution, 30 49 reactions, over perovskites, 36 311 suppression by sulfur, 31 229 zeolite-supported catalysts, 39 181-188... 

Primary coal liquids are high-viscosity black oils or pitches. Compared... 

If there is a petroleum shortage in the future the problem will be to provide a portion of the demand for transportation fuels from coal. Transportation fuels—jet, diesel, and gasoline—are distillates boiling below 650°F. However, the quantity of such distillates in primary coal liquids is small. 

Primary coal liquids must be upgraded in order to serve these markets. A logical route is to use current black oil conversion technology as practiced in the petroleum industry (2). An applicable UOP process is RCD Unibon (3). This comprises the direct processing of petroleum residues to reduce the sulfur and nitrogen content of heavy fuel oil or to combine desulfurization with conversion of residue to lighter, more valuable products. 

Table III. Distributions in Hydrotreatment of Pretreated Primary Coal Liquids...

Both particulates and dissolved metals are probably involved in pore plugging when processing primary coal liquids. Analyses suggest that the former are more significant in the case of the Synthoil sample, and both are significant in the case of the SRC sample. 

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