22.De-Ashed-Oilの水素化分解反応に関する研究(13) : 7800時間使用済み触媒のキャラクタリゼーション

抄録

The performance of the secondary hydrogenation catalyst(Ca-Ni-Mo/Al2O3) for the two-stage BCL process was investigated through the life-test for about 7800 hours including 50t/d pilot operations for 3400 hours. No considerable deactivation was occured during a operation from 3400 to 7800 hours. The behavior of carbonaceous deposit and ash accumulation on the used catalysts were examined in relation to the catalyst deactivation with the process time. These results indicated that Ca-Ni-Mo/Al2O3 could stand long use for a year, although the initial deactivation was resulted from the deposition of alkali metals (Na, K) and carbonaceous deposit on the catalyst.