Removal of sulfur compounds in FCC raw C4 using activated carbon impregnated with CuCl and PdCl2

Kyu sung Kim, Sun Hee Park, Ki Tae Park, Byung Hee Chun, Sung Hyun Kim

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

Fluid catalytic cracking (FCC) is one of the most important refinery processes for economical efficiency that produces commercial fuels with acceptable concentrations of sulfur. Several activated carbon (AC) based adsorbents were studied to develop a more efficient adsorbent for removal of mercaptanes and sulfides during the FCC C4 refinery process. The adsorbents were prepared by impregnating AC with CuCl and PdCl2. To evaluate the degree of metal halide impregnation into the AC support, each adsorbent was characterized by N2 adsorption, elemental analysis (EA) and XRF. Three types of ACs were used to investigate the effect of the structural properties such as surface area, total pore volume and pore size distribution. From this analysis, an AC micro pore size of 0.7 nm was found to be the most effective support material for FCC C4 removal of sulfur compounds. The experimental adsorption isotherms were compared with Langmuir and Freundlich models and were found to fit the Freundlich model much better than the Langmuir model. The sulfur removal performance of the prepared adsorbents was tested using the breakthrough experiments. The sulfur adsorption capacities of adsorbents decreased in the following order: AC impregnated PdCl2, AC impregnated CuCl and non-impregnated AC (NIAC). The saturated adsorbents were regenerated by toluene treatment and reactivated at 130 °C under a vacuum.

Original languageEnglish
Pages (from-to)624-631
Number of pages8
JournalKorean Journal of Chemical Engineering
Volume27
Issue number2
DOIs
Publication statusPublished - 2010 Mar

Keywords

  • Activated Carbon Adsorbent
  • Adsorption
  • CuCl Adsorbent
  • Desulfurization
  • FCC
  • Impregnation
  • PdCl Adsorbent
  • Sulfur Removal

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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