Fast catalytic cracking of heavy gas oils: modeling coke deactivation

Five-lump kinetic model with selective catalyst deactivation for the prediction of the product selectivity in the fluid catalytic cracking process

“…In most cases, the catalyst decay is modeled with an exponential or a power function. The exponential function, widely referred as first-order decay model [15], describes well the decay behavior of the catalyst for timeson-stream higher then 40 s [15] or 1 min [6]. However, for small times-on-stream, which is the case for typical commercial FCC risers and FCC pilot plants with residence times lower than 10 s, the power function suits better the experimental data [15].…”

“…Dupain et al [5] simplified the 5-lump model of Corella and Frances [4] for the specific case of the catalytic cracking of aromatic gas oil, by reducing the reactions involved in the lumping scheme. Another 5-lump model was developed by Larocca et al [6], in which the 3-lump model of Weekman was modified by splitting the gas oil lump into aromatic, paraffinic, and naphthtenic lumps. AncheytaJuarez et al [7] followed a different approach in their 5-lump models development, in which they considered the gas oil as one lump, but divided the gas lump into two lumps (liquefied product gas and dry gas).…”

Industrial Experience with Object-Oriented Modelling

“…Some models concern themselves only with the regenerator (Ford et al, 1976;Errazu et al, 1979;de Lasa et al, 1981;Guigon and Large, 1984;Krishna and Parkin, 1985;Lee et al, 1989a). Some have only reactor or cracking models (Weekman and Nace, 1970;Paraskos et al, 1976;Jacob et al, 1976;Shah et al, 1977; Lee et al, 1989b; Larocca et al, 1990;Takatsuka et al, 1987). There also exist integrated models coupling both the regenerator and reactor (Kumar et al, 1995;Lee and Kugelman, 1973;McGreavy and Isles-Smith, 1986;Bozicevic and Lukec, 1987;Arandes and de Lasa, 1992;McFarlane et al, 1993;Arbel et al, 1995;Arandes et al, 2000).…”

Reaction pathway analysis in thermal cracking of waste cooking oil to hydrocarbons based on monomolecular lumped kinetics

“…The kinetic modeling of refinery processes such as thermal cracking [31][32][33][34][35][36][37], catalytic cracking [38][39][40][41][42][43][44] and hydrocracking [45][46][47][48][49][50][51][52] was well established. Discrete lumping approach [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49]52] was successfully applied for modeling of aforementioned processes. Thermal cracking of residual feedstock was investigated in a batch reactor and observed that the reactions follow first order kinetics [31].…”