Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 239, Issue -, Pages 370-380Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2012.09.012
Keywords
Micro-mesoporous Ni/MMS; Desulfurization; Gasoline; Simulated fuels; Isotherm equations; Kinetics
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Funding
- National Natural Science Foundation of China
- BAOSTEEL Group Corporation [50876122]
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High performance nickel-based micro-mesoporous silica (Ni/MMS) sorbent was prepared by incipient wetness impregnation with ultrasonic aid (IWI-u) for adsorptive desulfurization (ADS) of commercial gasoline and simulated fuels. The sorbents were characterized with BET, XRD, TPR, SEM, HRTEM and TG/DTG. These results show that 20 wt%Ni/MMS (IWI-u) can still retain the framework of MMS and nickel particles were homogeneously distributed in the MMS channels without any aggregation, which improved significantly the ADS performance of the sorbents. The studies on the ADS kinetics indicate that the adsorption behavior of thiophene (T), benzothiophene (BT) and dibenzothiophene (DBT) over 20 wt%Ni/MMS (IWI-u) can be described appropriately by pseudo second-order kinetic model. The intraparticle diffusion model verified that the steric hindrance and intraparticle diffusion were the rate controlling step of the adsorption process of DBT molecules. Langmuir model can be used to describe the adsorption isotherms for T, BT and DBT due to low coverage. The regeneration sorbent maintains the sulfur removal efficiency of 85.9% for 6 cycles. (C) 2012 Elsevier B.V. All rights reserved.
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