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Removal of sulfur compounds in FCC raw C-4 using activated carbon impregnated with CuCl and PdCl2

Authors
Kim, Kyu-SungPark, Sun HeePark, Ki TaeChun, Byung-HeeKim, Sung Hyun
Issue Date
3월-2010
Publisher
KOREAN INSTITUTE CHEMICAL ENGINEERS
Keywords
Sulfur Removal; Desulfurization; Adsorption; Activated Carbon Adsorbent; CuCl Adsorbent; PdCl2 Adsorbent; Impregnation; FCC
Citation
KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.27, no.2, pp.624 - 631
Indexed
SCIE
SCOPUS
KCI
Journal Title
KOREAN JOURNAL OF CHEMICAL ENGINEERING
Volume
27
Number
2
Start Page
624
End Page
631
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/116834
DOI
10.1007/s11814-010-0105-y
ISSN
0256-1115
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 C-4 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 N-2 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 C-4 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 degrees C under a vacuum.
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