Rate enhancement for catalytic upgrading coal naphthas

Abstract

The amount of individual nitrogen and sulfur presented in the feed and hydrotreated Illinois #6 naphtha were determined. Th9 major nitrogen class in the naphtha are anilines. The major sulfur components identified are thiophenes and benzothiophenes. The aniline and quinoline is harder to remove than pyridine. The aniline and pyridine, without any carbon substituted, is the easiest one to remove in their class. The quinoline, without any carbon substituted, is approximately as hard as one carbon substituted quinoline to remove. Both Co-Mo and Ni-W catalysts follow the similar pattern of the nitrogen removal at different temperatures. The sulfur compounds of the III. #6 naphtha was separated to three classes, i.e. sulfides and thiols, thiophenes and benzothiophenes, for comparisons. The thiophenes was the major component of the hydrotreated naphtha at most temperatures; however, the sulfides and thiols class becomes the major compon_.nt at temperatures greater than 300°C.

Rate enhancement for catalytic upgrading coal naphthas. Quarterly progress report, April--June 1992

“…Hydrotreatment of the Illinois # 6 naphtha sample was carried out using two commercial catalysts (Co-Mo-Alumina, American Cyanamid HDS-1442A and Ni-W-Alumina Harshaw Catalyst, Ni-4301, E 1/12, Lot 16, Drum 29) over a range of temperature (200-400°C) and weight hourly space velocities (1-6 g/g/hr). Details of the experimental conditions are given elsewhere (19).…”