Cetyltrimethylammonium Bromide‐Assisted Adsorption Synthesis of Highly Dispersed NiMoS/C SAP‐CTAB Catalyst for Efficient Hydrodesulfurization
Year: 2025
Type: article
Abstract: Carbon is well‐known to support highly active Type II NiMoS catalysts for hydrodesulfurization. However, compared to the industrially applied Al 2 O 3 , the synthesis of highly dispersed active sites on carbon, unrestricted to weak carbon‐metal interactions, is yet to be explored. Herein, we reported a cetyltrimethylammonium bromide (CTAB) assisted adsorption method for synthesis of highly dispersed NiMoS/C SAP‐CTAB catalyst for efficacy HDS of sluggish dibenzothiophene (DBT) and 4,6‐dimethyl‐dibenzothiophene (4,6‐DMDBT). Fourier‐transform infrared spectroscopy (FTIR), X‐ray diffraction (XRD), Brunauer–Emmett–Teller (BET), scanning electron microscopy energy dispersive X‐Ray Spectroscopy (SEM‐EDX), inductively coupled plasma‐optical emission spectrometer (ICP‐OES), X‐ray photoelectron spectroscopy (XPS) and transmission electron microscope (TEM) characterizations demonstrate the crucial role of electrostatic attractions between cationic CTAB and anionic molybdates for dispersion of molybdate ions and resisting metal loss during the acid washing sodium removal process. Importantly, upon sulfidation activation, the well‐structured micropores and highly dispersed Type II active NiMoS sites were confirmed. More importantly, the optimized NiMo/C SAP‐CTAB catalyst demonstrated a turnover frequency of 3.61 h −1 for converting challenging 4,6‐DMDBT, 29% and 473% improvement compared to catalysts based on Al 2 O 3 and general carbon, thus highly promising for practical applications.
Authors: Jiong Sun, Shiquan Qu, Yanmei Zhu, Jiahao Zheng, Zhijing Liang, Cuizhen Bai, Muhammad Kamran, Changle Wang, Songdong Yao, Shao‐Tao Bai
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
Awards: G6179109576, G7010748898
OpenAlex ID: W4416755134