Refining of liquid fuel from N-Containing compounds via using designed Polysulfone@Metal organic framework composite film

Herein, composite films from polysulfone and metal organic framework (MOF) were prepared in order to purify the liquid fuel from nitrogenated compounds. Two polysulfone@MOF composite films were obtained with different MOF contents of 52.6 and 205.3 mg/g. Morphological shape, size and number of pores on the formed films surfaces were affected by incorporation of MOF into polysulfone. Size and number of pores in the composite films were both greater than that of polysulfone film. The obtained films were applied in removal of indole and quinoline as nitrogenated compounds from model fuel. The maximum adsorption capacities were considerably increased from 188.0 to 220.1 mg/g for polysulfone film to 249.7-257.9 mg/g and 619.4-674.2 mg/g for polysulfone@MOF composite films with 52.6 and 205.3 mg/g MOF, respectively. The adsorption was followed Langmuir isotherm and pseudo-second order kinetic model. After MOF incorporation, the adsorption rate of nitrogenated compounds was 3-4 times accelerated. After applying 4 repetitive regenerations, the adsorption capacity of composite was reduced by only 7.2-9%. These data confirmed the stability of polysulfone@MOF composite films against recycling and consequently eligible to reuse again with high adsorption efficiency. (C) 2019 Elsevier Ltd. All rights reserved.