INVESTIGADORES
SEDRAN Ulises Anselmo
artículos
Título:
Adsorption of Hydrocarbons on FCC Catalysts under Reaction Conditions
Autor/es:
GABRIELA DE LA PUENTE; ULISES SEDRAN
Revista:
INDUSTRIAL & ENGINEERING CHEMICAL RESEARCH
Editorial:
American Chemical Society
Referencias:
Lugar: Washington; Año: 2005 vol. 44 p. 3879 - 3886
ISSN:
0888-5885
Resumen:
A modified CREC Riser Simulator reactor was used in order to assess the adsorption constants
of various hydrocarbons produced in the cracking of n-hexadecane over an equilibrium commercial
FCC catalyst at 550 °C. Complementary experiments were performed with n-hexane on both
the same catalyst and a pure HY zeolite. A method to estimate apparent hydrocarbon adsorption
constants, based on mass balances, the assumption of Henry?s law-type behavior, and the
compositions observed in two samples, was proposed. One sample was collected immediately
after reaction, representing the gas phase that is in equilibrium with the catalysts, and the
other one included adsorbed hydrocarbons. It was shown that when a mixture of hydrocarbons
produced by cracking reactions contacts the catalysts, there exists a selective enhancement in
the adsorption of those hydrocarbons that individually adsorb more strongly. Additional
experiments with simple mixtures and no chemical reaction confirmed these observations.
Evidence suggests that the diffusive mass transport process in the catalyst particles plays an
important role.
n-hexadecane over an equilibrium commercial
FCC catalyst at 550 °C. Complementary experiments were performed with n-hexane on both
the same catalyst and a pure HY zeolite. A method to estimate apparent hydrocarbon adsorption
constants, based on mass balances, the assumption of Henry?s law-type behavior, and the
compositions observed in two samples, was proposed. One sample was collected immediately
after reaction, representing the gas phase that is in equilibrium with the catalysts, and the
other one included adsorbed hydrocarbons. It was shown that when a mixture of hydrocarbons
produced by cracking reactions contacts the catalysts, there exists a selective enhancement in
the adsorption of those hydrocarbons that individually adsorb more strongly. Additional
experiments with simple mixtures and no chemical reaction confirmed these observations.
Evidence suggests that the diffusive mass transport process in the catalyst particles plays an
important role.
n-hexane on both
the same catalyst and a pure HY zeolite. A method to estimate apparent hydrocarbon adsorption
constants, based on mass balances, the assumption of Henry?s law-type behavior, and the
compositions observed in two samples, was proposed. One sample was collected immediately
after reaction, representing the gas phase that is in equilibrium with the catalysts, and the
other one included adsorbed hydrocarbons. It was shown that when a mixture of hydrocarbons
produced by cracking reactions contacts the catalysts, there exists a selective enhancement in
the adsorption of those hydrocarbons that individually adsorb more strongly. Additional
experiments with simple mixtures and no chemical reaction confirmed these observations.
Evidence suggests that the diffusive mass transport process in the catalyst particles plays an
important role.