Document Type: Research Article
chemical engineering department, faculty of engineering, Ferdowsi university of Mashhad, Iran
Chemical Engineering Department, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
reseach institute of petroleum industry (RIPI), Tehran, Iran
In this study, nitrogen doped MWCNT-TiO2 nanocatalyst (N-CNT-TiO2) with 1, 3 and 5 wt. % nitrogen has been synthesized and its catalytic activity in the oxidation of H2S to sulfur has been studied at temperature of 200°C and O2/H2S mole ratio of 0.5 and compared with those of neat TiO2 and TiO2-CNT hybrid. Their structure, morphology and chemical properties have been determined by N2 adsorption–desorption isotherms, XRD, SEM, TEM, UV and FTIR. N-CNT-TiO2 exhibited improved performance compared with TiO2-CNT due to the presence of nitrogen groups. In addition, the nanocatalyst was comparable (up to 5%) with TiO2 because of the presence of lower band gap and synergistic effects. Furthermore, 5%N-CNT-TiO2 has shown the highest catalytic activity among N-CNT-TiO2 nanocatalysts due to its higher surface area and pore volume.