A Comparative Study of Metal Extraction from Spent Catalyst Using Acidithiobacillus ferrooxidans

Authors: Haragobinda Srichandan, Sradhanjali Singh, Dong Jin Kim, Seoung-Won Lee

Abstract:

The recovery of metal values and safe disposal of spent catalyst is gaining interest due to both its hazardous nature and increased regulation associated with disposal methods. Prior to the recovery of the valuable metals, removal of entrained deposits limit the diffusion of lixiviate resulting in low recovery of metals must be taken into consideration. Therefore, petroleum refinery spent catalyst was subjected to acetone washing and roasting at 500oC. The treated samples were investigated for metals bioleaching using Acidithiobacillus ferrooxidans in batch reactors and the leaching efficiencies were compared. It was found out that acetone washed spent catalysts results in better metal recovery compare to roasted spent. About 83% Ni, 20% Al, 50% Mo and 73% V were leached using the acetone washed spent catalyst. In both the cases, Ni, V and Mo was high compared to Al.

Keywords: Acetone wash, At. ferrooxidans, Bioleaching, Calcined, Metal recovery.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1062824

References:

[1] M. Marafi, A. Stanislaus, "Optios and process for spent catalyst handling and utilization" J. Hazard. Mater. Vol. 101, p.123-132, 2003.
[2] M. Marafi, A. Stanislaus, "Spent catalyst waste management: A review Part I-Developments in hydroprocessing catalyst waste reduction and use" Conserv. Recycling. Vol. 52,, p.859-873, 2008.
[3] D. Pradhan, D. Mishra, D. J. Kim, J.G. Ahan, G.R. Chaudhury, "Bioleaching kinetics and multivariate analysis of spent petroleum catalyst dissolution using two acidophiles" Journal of Hazardous Materials. Vol.175, p. 267-273, 2010.
[4] R. M. Gholami, S. M. Borghei, S. M. Mousavi, "Bacterial leaching of a spent Mo-Co-Ni refinery catalyst using Acidthiobacillus ferrooxidans and Acidithiobacillus thiooxidans" Hydrometallurgy. Vol.106, p.26-31, 2011.
[5] D. Pradhan, D. J. Kim, J. G. Ahn, G. R. Chaudhury, S. W. Lee,"Kinetics and statistical behavior of metals dissolution from spent petroleum catalyst using acidophilic iron oxidizing bacteria" Journal of Industrial and Engineering Chemistry. Vol.16, p.866-871, 2010.
[6] D. Mishra, D. J. Kim, D. E. Ralph, J. G. Ahn, Y. H. Rhee,"Bioleaching of spent hydro-processing catalyst using acidophilic bacteria and its kinetics aspect" J. Hazard. Mat. Vol.152, p.1082-1091, 2008.
[7] D. Mishra, D. J. Kim, D. E. Ralph, J. G. Ahn, Y. H. Rhee,"Bioleaching of vanadium rich spent refinery catalysts using sulfur oxidizing lithotrophs" Hydrometllurgy. Vol. 88, p.202-209, 2007.
[8] L. Briand, H. Thomas, E. Donati, "Vanadium (V) reduction in Thiobacillus thiooxidans cultures on elemental sulfur" Biotechnology letters. Vol. 18, p. 505-508, 1996.
[9] W. Mulak, B. Miazga, A. Szymczycha, "Kinetics of nickel leaching from spent catalyst in sulphuric acid solution" Int. J. Miner. Process. Vol. 77, p.231- 235, 2005.
[10] D.Mishra, D. J. Kim, D. E. Ralph, J. G. Ahn, Y. H. Rhee "Bioleaching of vanadium rich spent refinery catalysts using sulfur oxidizing lithotrophs" Hydrometallurgy. Vol. 88, p. 202-209, 2007.
[11] D. Mishra, J. G. Ahn, D. J. Kim, G. R. Chaudhury, D. E. Ralph, Dissolution kinetics of spent petroleum catalyst using sulfur oxidizing acidophilic microorganisms. Journal of Hazardous Materials. Vol. 167, p.1231-1236, 2009.
[12] Blight, K.R., Ralph, D.E., 2004. Effect of ionic strength on iron oxidation with batch cultures of chemolithotrophic bacteria. Hydrometallurgy 73, 325- 334.
[13] T. Rohwerder, T. Gehrke, K. Kinzler, W. Sand, "Bioleaching review part A: progress in bioleaching: fundamentals and mechanisms of bacterial metal sulfide oxidation" Appl Microbial Biotechnol. Vol 63, p. 239-248, 2003.