01973nab a2200229 4500 20260520000954.0 260224s xxu Impact of multiphase behavior on coke deposition in a commercial hydrotreating catalyst under sedimentation conditions 04/12/2008 ; 06/09/2005 7 p. TRANSCRIPCIÓN DEL RESUMEN PUBLICADO POR EL AUTOR: Coke deposition in heavy oil catalytic hydroprocessing remains a serious problem. The influence of multiphase behavior on coke deposition is an important but unresolved question in this literature. A model mixture comprising Athabasca vacuum bottoms (ABVB) + decane + hydrogen which is shown to exhibit low-density liquid + vapor, high-density liquid + vapor, as well as low-density liquid + high-density liquid + vapor, phase behavior at typical hydroprocessing conditions and a commercial heavy oil hydrotreating catalyst (NiMo/ -Al2O3) were employed in this investigation. The influence of multiphase behavior on coke deposition was explored under catalyst coking conditions (380 °C and 2 h). The liquid-liquid-vapor region extends from ~20% ABVB to ~50% ABVB. Coke deposition in the high-density liquid phase was found to be greater than in the low-density liquid phase, at fixed global composition. Conventional kinetics models which do not include the impact of such phase behavior effects cannot account for local maxima in the coke deposition versus coke precursor concentration profiles that result when complex phase behavior is encountered. Energy & fuels Vol. 19, no. 4 (jul.agos. 2005) ; p. 1405-1411 ARTICULO Zhang, Xiaohui 47287 Chodakowski, Martin 47288 Deposición de sólidos 47284 Catálisis 2782 Bitúmenes 1580 Petróleos pesados 22736 Chodakowski, Martin 47288 178026 178026 0 0 0 0 245845 BAAB BAAB 2026-03-05 200037547 0 200037547 2026-03-05 23:37:13 2026-03-05 ARTICULO