Conversion of LDPE into transportation fuels by a two-stage process using Ni/Al-SBA-15 as catalyst

SPECIAL FEATURE: ORIGINAL ARTICLE Chemical Feedstock Recycling 10

Abstract

Ni/Al-SBA-15 catalysts with Si/Al atomic ratios within the 20–135 range were prepared by a post synthesis grafting procedure, having nickel contents between 6 and 11 %. The addition of Ni to the Al-SBA-15 support caused a decrease of the BET surface area and pore volume. Additionally, larger Ni particles were attained over the catalysts with higher Si/Al atomic ratios, indicating the existence of some interaction between aluminium species and nickel particles. Ni/Al-SBA-15 catalysts displayed remarkable properties for the preparation of diesel fuels in the hydroreforming of the oils obtained from the LDPE thermal cracking. On increasing the Si/Al atomic ratios of the Ni/Al-SBA-15 catalysts, higher share of light and heavy diesel were attained, the sum reaching a maximum (67.3 %) for Ni/Al-SBA-15(70). This was caused by the higher extent of oligomerization reactions on enhancing the Si/Al atomic ratio. Additionally, around 85–90 % of the starting olefins were successfully hydrogenated and the aromatic content was rather low (below 5 %), without almost any polyaromatic compound (<0.1 %).

Keywords

Hydroreforming LDPE Ni/Al-SBA-15 Fuels 

Notes

Acknowledgments

The authors want to thank Spanish Ministry of Science and Innovation (project TRACE TRA2009-0111) for the financial support to this research.

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Copyright information

© Springer Japan 2014

Authors and Affiliations

  • J. M. Escola
    • 1
  • D. P. Serrano
    • 2
    • 3
  • M. Arroyo
    • 2
  • A. Alba
    • 1
  1. 1.Department of Chemical and Environmental TechnologyESCET Rey Juan Carlos UniversityMóstolesSpain
  2. 2.Department of Chemical and Energy TechnologyESCET Rey Juan Carlos UniversityMóstolesSpain
  3. 3.IMDEA Energy InstituteMóstolesSpain

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