Deep desulfurization by the adsorption process of fluidized catalytic cracking (FCC) diesel over mesoporous Al-MCM-41 materials

Bingsi S. Liu*, D. F. Xu, J. X. Chu, W. Liu, Chak Tong AU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)

Abstract

Al-MCM-41 adsorbents with different SiO2/Al2 O3 molar ratios (100, 50, and 30) were synthesized and used for desulfurization of a commercial diesel fuel (sulfur content = 1786 ppmw) at 373 K. The adsorbents were characterized by means of X-ray diffraction, N2 adsorption isotherm, Fourier transform infrared, and high-resolution transmission electron microscopy techniques. The adsorption capacity for sulfur-containing compounds was found to follow the order: Al-MCM-41(50) > Al-MCM-41(30) > Al-MCM-41(100) (the number in parentheses is the SiO2/ Al2O3 ratio hereafter). The efficiency of sulfur removal is 95% over Al-MCM-41(50) at the initial state and still above 75% after a cumulative effluent volume of 17 mL. The effect of the adsorption temperature on the adsorption capacity of Al-MCM-41(100) was investigated. The results indicate that high temperature is disadvantageous for desulfurization. After the regeneration of a spent Al-MCM-41(100) sample (calcined at 823 K for 6 h), there is good recovery of the adsorption capacity. In addition, with the presence of Cu+ ions in Al-MCM-41, there is enhancement in the adsorption capacity and sulfur removal efficiency at 373 K and the effect can be related to the formation of Π complexation between sulfur-containing compounds and Cu+ions.

Original languageEnglish
Pages (from-to)250-255
Number of pages6
JournalEnergy & Fuels
Volume21
Issue number1
DOIs
Publication statusPublished - Jan 2007

Scopus Subject Areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

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