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Adsorptive denitrogenation of fuel over molecularly imprinted poly-2-(1H-imidazol-2-yl)-4-phenol microspheres

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Abstract

Molecularly imprinted poly-2-(1H-imidazol-2-yl)-4-phenol microspheres (MIPs) were prepared by suspension polymerization of 2-(1H-imidazol-2-yl)-4-vinylphenol in the presence of nitrogen containing compounds (N-compounds). Nitrogen containing compounds such as quinoline, pyrimidine and carbazole, largely found in fuel oils, were employed as templates in MIP synthesis. Isothermal titration calorimetric (ITC) studies revealed that quinoline/2-(1H-imidazol-2-yl)-4-phenol (PIMH) and pyrimidine/2-(1H-imidazol-2-yl)-4-phenol (PIMH) interactions were exothermic (−18.0 ± 4.8 and −28.1 ± 3.6 kJ mol−1, respectively), while the carbazole/2-(1H-imidazol-2-yl)-4-phenol (PIMH) interaction was endothermic (3.3 ± 0.7 kJ mol−1). Imprinted microspheres show selectivity for the various target nitrogen-containing compounds in fuel oil with adsorption capacities of 10.56 mg g−1, 11.71 mg g−1 and 10.84 mg g−1 for pyrimidine, carbazole and quinoline, respectively. The removal of other stubborn nitrogen containing compounds from fuel oil demonstrates their potential application in the field of fuel denitrogenation.

Graphical abstract: Adsorptive denitrogenation of fuel over molecularly imprinted poly-2-(1H-imidazol-2-yl)-4-phenol microspheres

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Publication details

The article was received on 06 Jun 2018, accepted on 30 Jun 2018 and first published on 02 Jul 2018


Article type: Paper
DOI: 10.1039/C8NJ02818D
Citation: New J. Chem., 2018, Advance Article
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    Adsorptive denitrogenation of fuel over molecularly imprinted poly-2-(1H-imidazol-2-yl)-4-phenol microspheres

    M. S. Abdul-quadir, R. van der Westhuizen, W. Welthagen, E. E. Ferg, Z. R. Tshentu and A. S. Ogunlaja, New J. Chem., 2018, Advance Article , DOI: 10.1039/C8NJ02818D

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