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Cobalt‐promoted MoS 2 nanosheets: A promising novel diesel hydrodesulfurization catalyst
Author(s) -
Abbasi Ali,
Karimi Ali,
Aghabozorg Hamidreza,
Sadighi Sepehr,
Aval Maryam Alizadeh
Publication year - 2020
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.21338
Subject(s) - hydrodesulfurization , catalysis , chemistry , cobalt , molybdenum , flue gas desulfurization , thermogravimetric analysis , diesel fuel , dibenzothiophene , thiourea , nuclear chemistry , inorganic chemistry , chemical engineering , organic chemistry , engineering
MoS 2 has been commonly used as a catalyst in hydrodesulfurization (HDS) of petroleum cuts in crude oil refineries. In this study, the synthesis of unsupported MoS 2 and Co‐promoted MoS 2 nanosheets produced from molybdenum oxide and thiourea is reported. The synthesized samples were characterized by using x‐ray fluorescence, x‐ray diffraction, Brunauer–Emmett–Teller (BET), temperature‐programmed reduction, thermal gravimetric analysis, and transmission electron microscopy methods, and then they were utilized for HDS of diesel through a fixed‐bed catalytic reactor. Results indicated that a cobalt promoter affected both the number and the performance of active sites of the molybdenum sulfides, and the activity of the promoted MoS 2 catalyst was consistently higher than that of the MoS 2 catalyst. More significantly, the activity of the promoted catalyst was slightly declined during 48 h continuous HDS reaction, which indicated the stability of this catalyst. Additionally, during 12 h of test run, the HDS activity of the promoted catalyst was about 60% higher than MoS 2 one.