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Journal of Materials Science

, Volume 44, Issue 24, pp 6546–6552 | Cite as

Synthesis of mesoporous aluminophosphates impregnated with metals and their application in gas oil desulphurization by adsorption

  • V. I. ÁguedaEmail author
  • J. L. Sotelo
  • M. A. Uguina
  • R. Rodríguez
Mesostructured Materials
  • 190 Downloads

Abstract

Mesoporous materials based on aluminophosphates and silicates have been synthesised and impregnated with different loadings of transition metals such as Ag, Cu and Ni. These materials have been characterised and tested as selective adsorbents for the desulphurization of light cycle oil (LCO) by liquid adsorption. The polarity of the adsorbent matrix showed a positive effect on desulphurization, leading the impregnated aluminophosphates to higher adsorption capacities than the silicates. Among the transition metals tested, Ag-impregnated materials showed the best results followed by Cu and Ni. The aluminophosphate synthesised using pluronic F-127 block copolymer impregnated with a 5% of Ag (MFAP-5Ag) presented the best adsorption results with a maximum adsorption capacity of 11.36 mg S/g of adsorbent (equilibrium experiments), and breakthrough and saturation capacities of 4.25 mgS/g and 7.06 mgS/g, respectively (dynamic experiments).

Keywords

Adsorption Capacity Mesoporous Material Maximum Adsorption Capacity High Adsorption Capacity Cooperative Adsorption 

List of symbols

C

Sulphur concentration, ppmw

FBU

Fractional bed utilisation; defined as qbr/qsat

K

Equilibrium constant, ppmn; parameter defined in Eq. 1

n

Langmuir-Freundlich exponent; parameter defined in Eq. 1

qD

Adsorption capacity, mg g−1

qD.eq

Adsorption capacity from the isotherm at a given concentration, mg g−1

qmax

Maximum adsorption capacity, mg g−1; parameter defined in Eq. 1

DES

Degree of desulphurization, %

t

Time, min

Subscripts and superscripts

0

Initial

br

Breakthrough time

eq

Equilibrium

sat

Saturation time

Notes

Acknowledgements

Financial support from E.U. and Comunidad Autónoma de Madrid through the projects FEDER European Project 2FD1997-1873 and CAM 07 M/0056/2001 is gratefully acknowledged.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • V. I. Águeda
    • 1
    Email author
  • J. L. Sotelo
    • 1
  • M. A. Uguina
    • 1
  • R. Rodríguez
    • 1
  1. 1.Chemical Engineering Department, Faculty of ChemistryComplutense University of MadridMadridSpain

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