Kim, Hyun Koo Lee, Chang-Whan Kim, Minsoo Oh, Joo Hyeng Song, Shin Ae Jang, Seong-Cheol Yoon, Chang Won Han, Jonghee Yoon, Sung Pi Nam, Suk Woo Choi, Dae-Ki Shul, Yong-gun Ham, Hyung Chul 2024-01-20T03:01:48Z 2024-01-20T03:01:48Z 2021-09-05 2016-11-02 0360-3199 https://pubs.kist.re.kr/handle/201004/123457 One of promising methods for removing the sulfur compounds from diesel fuel is hydro-desulfurization, in which the sulfur in diesel is hydrotreated by reaction with H-2 to liberate H2S. In hydrodesulfurization, a highly efficient catalyst is required fuel cell applications because the level of sulfur compounds should be below 0.1 ppm to allow stable molten carbonate fuel cell operation. In this study, we prepared the CoMo/Al2O3, CoMo/CeO2, CoMo/TiO2 catalysts using ultrasonic spray pyrolysis and the activities of synthesized catalysts toward the hydrodesulfurization of 4, 6-dimethyldibenzothiophene were examined using a flow reactor. First, our measurement results using X-ray diffraction, scanning electron microscope, field emission gun electron probe micro analyzer and transmission electron microscope suggested that the Co and Mo particles are uniformly distributed on the supports (Al2O3, CeO2, and TiO2) we considered. Second, from the analysis of surface properties using via Raman spectroscopy, we identified the characteristic phases (such as Ce2Mo3O13, MoO3, and CoMoO4 of each synthesized catalyst, which may significantly influence hydrodesulfurization reactivity. Finally, the evaluation of catalytic activity showed that the order of hydrodesulfurization activity is CoMo/CeO2 > CoMo/Al2O3> CoMo/TiO2. In particular, a CoMo/CeO2 catalyst exhibits the highest catalytic activity toward hydrodesulfurization, reducing the amount of 4, 6-dimethyldibenzothiophene from 10 ppm to about 0.1 ppm at 350 degrees C. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD DEEP DESULFURIZATION RAMAN-SPECTROSCOPY MO CATALYSTS GAS OIL CO-MO DIESEL HYDRODESULFURIZATION ACTIVATION Preparation of CoMo/Al2O3, CoMo/CeO2, CoMo/TiO2 catalysts using ultrasonic spray pyrolysis for the hydro-desulfurization of 4, 6-dimethyldibenzothiophene for fuel cell applications Article 10.1016/j.ijhydene.2016.06.040 1 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.41, no.41, pp.18846 - 18857 INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 41 41 18846 18857 scie scopus 000385598300055 2-s2.0-84978468578 Chemistry, Physical Electrochemistry Energy & Fuels Chemistry Electrochemistry Energy & Fuels Article; Proceedings Paper DEEP DESULFURIZATION RAMAN-SPECTROSCOPY MO CATALYSTS GAS OIL CO-MO DIESEL HYDRODESULFURIZATION ACTIVATION Ultrasonic spray pyrolysis (USP) Hydrodesulfurization 4, 6-dimethyldibenzothiophene (4, 6-DMDBT) Catalyst support Fuel cell