High Catalytic Efficiency of a Layered Coordination Polymer to Remove Simultaneous Sulfur and Nitrogen Compounds from Fuels
authors Mirante, F; Mendes, RF; Paz, FAA; Balula, SS
nationality International
journal CATALYSTS
author keywords layered coordination polymer; oxidative desulfurization; denitrogenation extraction; hydrogen peroxide; lanthanides
keywords METAL-ORGANIC FRAMEWORKS; OXIDATIVE DESULFURIZATION; DIESEL; EXTRACTION; POLYOXOMETALATE; DENITROGENATION; PERFORMANCE; EMISSIONS; VEHICLES; SOLVENT
abstract An ionic lamellar coordination polymer based on a flexible triphosphonic acid linker, [Gd(H(4)nmp)(H2O)(2)]Cl2H2O (1) (H(6)nmp stands for nitrilo(trimethylphosphonic) acid), presents high efficiency to remove sulfur and nitrogen pollutant compounds from model diesel. Its oxidative catalytic performance was investigated using single sulfur (1-BT, DBT, 4-MDBT and 4,6-DMDBT, 2350 ppm of S) and nitrogen (indole and quinolone, 400 ppm of N) model diesels and further, using multicomponent S/N model diesel. Different methodologies of preparation followed (microwave, one-pot, hydrothermal) originated small morphological differences that did not influenced the catalytic performance of catalyst. Complete desulfurization and denitrogenation were achieved after 2 h using single model diesels, an ionic liquid as extraction solvent ([BMIM]PF6) and H(2)O(2)as oxidant. Simultaneous desulfurization and denitrogenation processes revealed that the nitrogen compounds are more easily removed from the diesel phase to the [BMIM]PF(6)phase and consequently, faster oxidized than the sulfur compounds. The lamellar catalyst showed a high recycle capacity for desulfurization. The reusability of the diesel/H2O2/[BMIM]PF(6)system catalyzed by lamellar catalyst was more efficient for denitrogenation than for desulfurization process using a multicomponent model diesel. This behavior is not associated with the catalyst performance but it is mainly due to the saturation of S/N compounds in the extraction phase.
publisher MDPI
isbn 2073-4344
year published 2020
volume 10
issue 7
digital object identifier (doi) 10.3390/catal10070731
web of science category Chemistry, Physical
subject category Chemistry
unique article identifier WOS:000557714000001
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journal impact factor 3.52
5 year journal impact factor 3.708
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