期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 321, 期 -, 页码 344-352出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2016.09.026
关键词
Metal-organic frameworks; Magnetically responsive composites; Desulfurization; Denitrogenation; Regeneration
资金
- National Natural Science Foundation of China [21576137]
- Distinguished Youth Foundation of Jiangsu Province [BK20130045]
- Fok Ying-Tong Education Foundation [141069]
- National Basic Research Program of China (973 Program) [2013CB733504]
- Project of Priority Academic Program Development of Jiangsu Higher Education Institutions
Selective adsorption by use of metal-organic frameworks (MOFs) is an effective method for purification of hydrocarbon fuels. In consideration that the adsorption processes proceed in liquid phases, separation and recycling of adsorbents should be greatly facilitated if MOFs were endowed with magnetism. In the present study, we reported for the first time a dry gel conversion (DGC) strategy to fabricate magnetically responsive MOFs is adsorbents for deep desulfurization and denitrogenation. The solvent is separated from the solid materials in the DGC strategy, and vapor is generated at elevated temperatures to induce the growth of MOFs around magnetic Fe3O4 nanoparticles. This strategy can greatly simplify the complicated procedures of the well-known layer-by-layer method and avoid the blockage of pores confronted by introducing magnetic Fe3O4 nanoparticles to the pores of MOFs. Our results show that the adsorbents are capable of efficiently removing aromatic sulfur and nitrogen compounds from model fuels, for example removing 0.62 mmol g(-1) S and 0.89 mmol g(-1) N of thiophene and indole, respectively. In addition, the adsorbents are facile to separate from liquid phases by use of an external field. After 6 cycles, the adsorbents still show a good adsorption capacity that is comparable to the fresh one. (C) 2016 Elsevier B.V. All rights reserved.
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