화학공학소재연구정보센터
Fuel, Vol.100, 73-79, 2012
Effect of different heavy feedstocks on the deactivation of a commercial hydrotreating catalyst
Different feedstocks (7-21 degrees API gravity, 300-450 ppm Ni + V) were hydrotreated in a bench-scale reactor at moderate reaction conditions (70 kg/cm(2), 5000 ft(3)/bbl H-2/oil ratio, 0.5 h(-1) LHSV) to study the deactivation of a NiMo/gamma-Al2O3 commercial catalyst. The experiments were carried out at three temperatures (380, 400 and 420 degrees C) and samples were taken every 10 h during 240 h of time-on-stream and characterized for sulfur, metals and asphaltenes contents. The conversion of impurities resulted higher as the temperature was increased. The properties of the feed and of their asphaltenes were found to have a great impact on catalyst deactivation. A deactivation model considering both metals and carbon depositions was used to fit the data. Good agreement of the overall trend of experimental and predicted deactivation curves was observed. (c) 2012 Elsevier Ltd. All rights reserved.