Effect of ligands of functional magnetic MOF-199 composite on thiophene removal from model oil
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Effect of ligands of functional magnetic MOF-199 composite on thiophene removal from model oil Mingyan Chen1,2, Ziying Wang1, Yucheng Liu1,2,* Dong Gan1 1 2
, Jie Chen1, Jie Liu1, and
School of Chemistry and Chemical Engineering of Southwest Petroleum University, Chengdu, SiChuan, China Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization in Southwest Petroleum University, Chengdu, SiChuan, China
Received: 12 July 2020
ABSTRACT
Accepted: 3 October 2020
Preparation of magnetic functional MOF-199 composites with good adsorption performance and easy recovery by solvothermal method for removal of thiophene from model oil. Study focused on the desulfurization performance of composites under different adsorption time, adsorption temperature, oil to adsorbent ratio, competitive adsorption, reuse times conditions. The morphology and structure of the composites were characterized by XRD, FTIR, BET, VSM and EDS. And the experimental results show that the adsorbent achieved the best desulfurization effect under the condition of 30 °C and the oil to adsorbent ratio was 100 for 240 min. The adsorption effect was Fe3O4–COOH/ MOF-199(FCM) [ Fe3O4–NH2/MOF-199(FNM) [ Fe3O4/MOF-199(FM), which due to FCM exhibited a more powerful interaction between –COOH and thiophene base. In addition, the desulfurization performance of the adsorbents was affected by addition of competitors toluene and cyclohexene in the model oil. Adsorbent showed excellent desulfurization performance after 5 reuses. Webber–Morris model and Freundlich model are suitable to describe the desulfurization process of adsorbents.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
Handling Editor: Christopher Blanford.
Address correspondence to E-mail: [email protected]
https://doi.org/10.1007/s10853-020-05422-8
J Mater Sci
GRAPHIC ABSTRACT
Introduction The combustion of sulfur, nitrogen and other impurities contained in oil products produces harmful gases. The SOx produced by combustion of sulfur containing oil will poison automobile catalyst and cause environmental problems such as acid rain and haze when it is discharged into the atmosphere, which will have a huge impact on human living and ecological environment [1, 2]. In order to reduce the environmental damage caused by sulfur in oil, most countries around the world have issued corresponding laws and regulations to control the sulfur content in oil. Since July 1, 2019, China has implemented the National VI standard, which stipulates that the sulfur content in gasoline and diesel oil is less than 10 mg kg-1. Under the law and environmental protection policy, people begin to pay attention to environmental protection, oil quality is strictly controlled, and desulfurization is imminent [3, 4]. Hydrodesulfurization is a relatively mature desulfurization technology, which can effectively remove mercaptan and disulfide, but thiophene sulfur structure is difficult to be hydrogenated and decomposed, it is not suitable for hydrodesulfurization to remove thiophe
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