Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/1933
Title: Bioleaching of nickel from equilibrium fluid catalytic cracking catalysts
Authors: Bayraktar, Oğuz
Keywords: Aspergillus niger
Bioleaching
Fluidized catalytic cracking catalyst
Nickel
Leaching
Issue Date: Jul-2005
Publisher: Springer Verlag
Source: Bayraktar, O. (2005). Bioleaching of nickel from equilibrium fluid catalytic cracking catalysts. World Journal of Microbiology and Biotechnology, 21(5), 661-665. doi:10.1007/s11274-004-3573-6
Abstract: This study investigates the possibility of reusing metal-contaminated equilibrium fluid catalytic cracking (FCC) catalyst after bioleaching. Leaching with Aspergillus niger culture was found to be more effective in the mobilization of nickel from the catalyst particles compared to chemical leaching with citric acid. Bioleaching achieved 32% nickel removal whereas chemical leaching achieved only 21% nickel removal from catalyst particles. The enhanced nickel removal from the catalysts in the presence of A. niger culture was attributed to the biosorption ability of the fungal mycelium and to the higher local concentration of citric acid on the catalyst surface. It was found that 9% of solubilized nickel in the liquid medium was biosorbed to fungal biomass. After nickel leaching with A. niger culture, the hydrogen-to-methane molar ratio and coke yield, which are the measures of dehydrogenation reactions catalysed by nickel during cracking reactions, decreased significantly.
URI: https://doi.org/10.1007/s11274-004-3573-6
http://hdl.handle.net/11147/1933
ISSN: 0959-3993
0959-3993
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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