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Reference type: Journal
Authors: Abdul-Quadir MS, van der Westhuizen R, Welthagen W, Ferg EE, Tshentu ZR, Ogunlaja AS
Article Title: Adsorptive denitrogenation of fuel over molecularly imprinted poly-2-(1H-imidazol-2-yl)-4-phenol microspheres.
Publication date: 2018
Journal: New Journal of Chemistry
Volume: 42
Issue: (15)
Page numbers: 13135-13146.
DOI: 10.1039/C8NJ02818D

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
Template and target information: quinoline, pyrimidine, carbazole


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