Effects of pore size, mesostructure and aluminum modification on FDU-12 supported NiMo catalysts for hydrodesulfurizatio
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ORIGINAL PAPER
Effects of pore size, mesostructure and aluminum modification on FDU‑12 supported NiMo catalysts for hydrodesulfurization Pei Yuan1 · Xue‑Qin Lei1 · Hong‑Ming Sun1 · Hong‑Wei Zhang1 · Chun‑Sheng Cui2 · Yuan‑Yuan Yue1 · Hai‑Yan Liu2 · Xiao‑Jun Bao1 · Ting‑Hai Wang1 Received: 7 June 2020 © The Author(s) 2020
Abstract A series of NiMo/FDU-12 catalysts with tunable pore diameters and mesostructures have been controllably synthesized by adjusting the synthetic hydrothermal temperature and applied for the hydrodesulfurization of dibenzothiophene and its derivative. The state-of-the-art electron tomography revealed that the pore sizes of FDU-12 supports were enlarged with the increase in the hydrothermal temperature and the mesostructures were transformed from ordered cage-type pores to locally disordered channels. Meanwhile, the M oS2 morphology altered from small straight bar to semibending arc to spherical shape and finally to larger straight bar with the change of support structures. Among them, FDU-12 hydrothermally treated at 150 °C possessed appropriate pore diameter and connected pore structure and was favorable for the formation of highly active MoS2 with curved morphology; thus, its corresponding catalyst exhibited the best HDS activity. Furthermore, it was indicated that the isomerization pathway could be significantly improved for HDS of 4,6-dimethyldibenzothiophene after the addition of aluminum, which was expected to be applied to the removal of the macromolecular sulfur compounds. Our study sheds lights on the relationship between support effect, active sites morphology and HDS performance, and also provides a guidance for the development of highly active HDS catalysts. Keywords Mesostructure · FDU-12 · NiMo catalysts · Hydrodesulfurization · Al modification
1 Introduction Nowadays, the demand of low-sulfur, high-quality transportation fuels is growing rapidly by reason of the necessity to solve pollution problems induced by S Ox emissions
Handling Editor: Jian Liu Edited by Xiu-Qiu Peng Electronic supplementary material The online version of this article (https://doi.org/10.1007/s12182-020-00502-5) contains supplementary material, which is available to authorized users. * Ting‑Hai Wang [email protected] 1
National Engineering Research Center of Chemical Fertilizer Catalyst, School of Chemical Engineering, Fuzhou University, Fuzhou 350002, People’s Republic of China
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, People’s Republic of China
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and to meet the increasingly stringent environmental protection laws and regulations (Rajendran et al. 2020). The main industrial processes to realize sulfur removal include hydrodesulfurization (HDS), oxidative desulfurization (Zhang et al. 2020; Wu et al. 2020; Wei et al. 2020; Jiang et al. 2020) and adsorptive desulfurization (Dong et al. 2020; Liu et al. 2019; Wu et al. 2018a; Li et al. 2018a). During the HDS process, catalysts play an important role in determining the efficiency. Th
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