A reactive distillation process for deep hydrodesulfurization of diesel: Multiplicity and operation aspects

EFEITOS DO TEOR DE FÓSFORO E INIBIÇÃO POR NITROGENADOS EM CATALISADORES NiMoP/Al2O3 NA HIDRODESSULFURIZAÇÃO DE DIBENZOTIOFENO

“…A remoção de enxofre de compostos organo-sulfurados está consolidada através de duas rotas na literatura (Cárdenas-Guerra et al, 2010). Para o dibenzotiofeno (DBT), a primeira envolve a dessulfurização direta (DDS), com formação de bifenil (BF), cuja hidrogenação consecutiva resulta ciclohexilbenzeno (CHB).…”

“…Para o dibenzotiofeno (DBT), a primeira envolve a dessulfurização direta (DDS), com formação de bifenil (BF), cuja hidrogenação consecutiva resulta ciclohexilbenzeno (CHB). A segunda é a hidrogenação direta (HID) de um dos anéis benzênicos do DBT, gerando ao final CHB (Cárdenas-Guerra et al, 2010).…”

On the multiple solutions of the reactive distillation column for production of fuel ethers

“…While some results state the uniqueness of solution for binary distillation, other studies have concluded that multiple steady state can arise in binary distillation if the flow rates are given on a mass basis instead of a molar basis, or if multicomponent mixtures are separated in processes with an increase of the number of stages [10,11]. Regarding reactive distillation, several works have reported the existence of multiple steady states in both theoretical and experimental studies (e.g., [10,[12][13][14][15][16]). Some authors have studied and analyzed the presence of multiplicity in reactive distillation columns using several operative variables and design parameters such as the system configuration, the selection of both thermodynamic and kinetic models, the reflux ratio, and the location of feed inlets, among others [17].…”

Process Intensification

“…[16]), the usage of simulators does not directly provide results indicating the presence of multiple stationary states because of they are designed to obtain a unique solution. The identification of additional solutions can be performed using a sensitivity analysis on the system in one or more operation parameters or by varying the initial estimates of the previous solution [16].…”

“…Table 3 provides information on the configuration of the reactive columns derived from the methodology of CarreraRodríguez et al [8]. Once defined the configurations of the reactive columns, they were simulated in Aspen Plus to detect the presence of multiple steady states following the approach described by Cardenas-Guerra et al [16].…”