石炭液化油のアップグレーディング反応におけるNi-W/Al_2O_3触媒の活性低下

概要

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Coal-derived liquid contains a large amount of nitrogen compounds which should be removed for a clean motor fuel. In the coal liquefaction project in Japan, Ni-W/Al_2O_3 has been developped for the hydrodenitrogenation of coal liquid. The purpose of this paper is to show the high performance of the developped catalyst and to estimate the catalyst life. A continues trickeled-bed microreactor was used in this work. The preliminary experiments showed that 1) the catalyst shoud be presulfided at the high temperature such as 400℃ under a H_2S-H_2 stream, 2) the raw coal liquid should be distilled before hydrotreating because of the existence of sludge material, 3) the higher puressure of Ha is preferable for deeper denitrogenation and longer catalyst life. Based on the above information, the hydrotreatmnet of coal liquid (N; 5600wtppm) was carried out under 12MPa H_2 and H_2/oil ratio 1000 (L/L) for five months. It was supposed that the Ni-W/Al_2O_3 catalyst could reduce the nitrogen content from 5600ppm to 10ppm for about one year in the case of LHSV 1h^<-1>.
一般社団法人日本エネルギー学会の論文
2004-03-20