1998 Volume 77 Issue 12 Pages 1201-1213
Nippon Coal Oil Co., Ltd.has conducted the R&D of the 150 t/d Coal Liquefaction Pilot Plant (PP) since 1984. The trial runs for coal-feeding and the regular runs confirmed that the NEDOL process is an excellent coal liquefaction process in a large-scale pilot plant, as follows: (1) The synergetic effect of the low-cost fine-iron liquefaction catalyst and hydrogen donor solvent used in the NEDOL process proved to be effective for producing a high yield of naphtha-fraction-rich liquefied oil under the mild reaction conditions.(2) Through the continuous 80-day coal-feeding operation, operating skills were acquired, and the excellent operation stability of the process was confirmed.
The objective of this report is to elucidate the countermeasures of the issues on runs and the effect of reaction conditions on product yields.