Journal
CHEMICAL ENGINEERING JOURNAL
Volume 374, Issue -, Pages 1005-1012Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.06.024
Keywords
N-doped porous carbon; Adsorptive denitrogenation; Porosity; N-doped site; Indole
Categories
Funding
- National Natural Science Foundation of China [21676138, 21722606, 21576137, 21808105, 21878149, 21808110]
- Natural Science Foundation of Jiangsu Province [BK20180709]
- China Postdoctoral Science Foundation [2018M632295]
- Six Talent Plan [2016XCL031]
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Reducing the nitrogen-containing compounds (NCCs) in fuel oils to ultralow level is essential for preventing the oil refining catalysts from being poisoned and for protecting the environment. Adsorptive denitrogenation is proved to be an effective mean to reduce the NCCs content. Herein, a series of N-doped porous carbons (NDPCs) in possession of proper pore structures, large surface area and moderate N species, which is verified through a series of characterization, are synthesized on the basis of the precursor copolymerized between 2,4,6-tris (chloromethyl)mesitylene and ethylenediamine. The NDPC-700 produced from the copolymer carbonization at 700 degrees C exhibits a record high adsorptive capacity of 7.35 mmol.g(-1) for indole in the model oils, and the stable performance on the NCC adsorption is observed after 10 cycles of regeneration and reusage. The excellent adsorption capacity is attributed to the synergistic effect between porosities and N-containing sites. Moreover, the first-principle simulation proves that the N species, in particular the N-5 species, is helpful to the improvement of the adsorption capacity for indole.
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