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Y zeolite equilibrium catalyst waste from fluidized catalytic cracking regenerated by electrokinetic treatment: An adsorbent for sulphur and nitrogen compounds
Author(s) -
de Oliveira Thamayne Valadares,
Valt Renata Bachmann Guimarães,
de Araújo Ponte Haroldo,
de Santana Ponte Maria José Jerônimo,
Yamamoto Carlos Itsuo,
de Souza Antônio Augusto Ulson,
de Arruda Guelli Ulson de Souza Selene Maria
Publication year - 2018
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.23203
Subject(s) - dibenzothiophene , chemistry , adsorption , fluid catalytic cracking , zeolite , catalysis , diesel fuel , quinoline , langmuir adsorption model , thermogravimetric analysis , nuclear chemistry , inorganic chemistry , chemical engineering , organic chemistry , engineering
The adsorption of sulphur, nitrogen, and aromatic compounds on a regenerated equilibrium catalyst (ecat‐R) was studied using model and real diesel fuels. The ecat‐R was obtained by electrokinetic treatment of an equilibrium catalyst (Y zeolites) waste from fluidized catalytic cracking (FCC) units. The studied model diesel fuel contained dibenzothiophene (1039 mg/L), quinoline (600 mg/L), and naphthalene (600 mg/L), as models for sulphur, nitrogen, and aromatic compounds, respectively, in n ‐decane as solvent. The ecat‐R was characterized using X‐ray diffraction, X‐ray fluorescence, N 2 adsorption‐desorption, thermogravimetric and differential thermal analysis, scanning electron microscopy, Fourier‐transform infrared spectroscopy, and granulometry. The adsorption experiments were performed at 40 °C and 150 rpm. The results of the isotherm and a chemical kinetics studies were favourable; the material showed a high adsorption capacity for dibenzothiophene (2.8 mg S/g) and quinoline (6.3 mg N/g). The isotherm for naphthalene was less favourable (2 mg NAP/g). The process rapidly reached equilibrium in approximately 2 h. For real diesel fuel, the adsorption removal was 26 % for sulphur and 36 % for nitrogen.