Muhammad Hanif
Pusat Pengkajian dan Penerapan Teknologi Konversi dan Konservasi Energi, BPPT
Jl. M.H. Thamrin 8, BPPT Gedung II Lantai 22, Jakarta 10340
Tel. (021) 316 9889, E-mail: madhanif@kompascyber.com
Abstract
Hydrodenitrogenation of coal-derived liquid, obtained from the liquefaction of Tanito Harum coal, was achieved in a fixed bed continuous flow reactor over a sulfided nickel-tungsten catalyst supported alumina. The catalytic durability and catalyst life-time were investigated by deciding the target nitrogen content of the product oil at 10 ppm. Experiment runs were carried out at reaction temperatures in the range 330-350 o C, liquid hourly space velocity of 1 hr -1 , hydrogen pressure of 12 MPa and hydrogen/oil ratio of 1000 NL/L, during the total reaction time on stream of 40 days. As a result, dependency of nitrogen content was 0.8 (ppm/ o C) at temperature 335 to 340 o C. The deactivation rate was around 1.0 ppm/10 days at temperature 345 o C for 3 weeks operation. If the deactivation rate is equal at all temperature to 390 o C, the reaction temperature should be raised at 1.0 o C/8 days to maintain the nitrogen content at 10 ppm for the initial stage of the operation and temperature should be 386 o C in one year. It can be concluded that Ni-W/Alumina catalyst gave a high catalytic activity and long life in hydrodenitrogenation of coal-derived liquid.
