Laboratory Studies of the Conversion of Solvent Refined Lignite to Light Liquid Fuels. Project Lignite: Premium Fuels from Northern Great Plains Lignite. R and D Report No. 106,Interim Report No. 3.

摘要

Characterization studies of solvent refined lignite (SRL) and solvent refined coal (SRC),and the results of SRL and SRC conversions to lighter materials are described. The solubilities of SRL were determined in about forty organic solvents,several of which dissolved the SRL completely. The basic nitrogen and phenolic contents in the SRL were determined by potentiometric titrations. Some of the nitrogen in SRL comes from the solvent used in its preparation. From spectral studies,elemental analyses,and molecular weight determinations,some structural features of the average SRL molecule were deduced. Approximately 90hydrogenation experiments were conducted for SRL and SRC conversion to gas and distillable liquid products using a standard set of reaction conditions for catalyst screening. Optimum conditions seemed to be 450exp 0 C with initial hydrogen pressures of 1800psi for non-solvent reactions and 2500psi with solvent. The best catalyst,in terms of overall conversion and denitrogenation,was presulfided Ni-Mo-Al sub 2 O sub 3which gave approximately 90percent conversion of SRL to 10percent gases and 80percent distillable liquids. Almost equally high conversion was obtained with SRC using the same reaction conditions. (ERA citation 02:023922)