Main Article Content
The present study aims for characterization and classification of five different spent petroleum refinery catalysts followed by metal recovery via bioleaching. The nomenclature given to the different spent catalyst (SC) is SC1, SC2, SC3, SC4 and SC5 collected from an Indian petroleum refinery. All spent catalysts were crushed and ground prior to their characterization by X-Ray Fluorescence for chemical composition followed by X-Ray Diffraction and Scanning Electron Microscopy-Energy Dispersive X-Ray Spectroscopy for their mineralogy. Further, all five spent catalysts were classified based upon their chemical composition and mineralogy. Metal recovery from the spent catalysts was carried out by bioleaching by a mixed microbial consortium of iron and Sulphur oxidizing microorganisms. Most of the spent catalysts showed very significant metal recovery with respect to Ni, Cu, Cr, Mo, Zn, Sr and Ti. The study provides a possible metal recovery route via bioleaching for further testing and scaling up.
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- Marafi M and Rana MS. Refining Waste Spent Hydroprocessing Catalyst and Their Metal Recovery. International Journal of Environmental and Ecological Engineering, 2017, 11(10): 893-897.
- Marafi M and Rana MS. Metal leaching from refinery waste hydroprocessing catalyst. Journal of Environmental Science and Health, Part A, 2018, 53: 951-959. https://doi.org/10.1080/10934529.2018.1470802
- Akcil A, Vegli`o F, Ferella F, et al. A review of metal recovery from spent petroleum catalysts and ash. Waste Management, Tuncuk, Waste Management, 2015, 45: 420-433. https://doi.org/10.1016/j.wasman.2015.07.007
- Vyas S and Ting YP. Sequential biological process for molybdenum extraction from hydrodesulphurization spent catalyst. Chemosphere, 2016, 160: 7-12. https://doi.org/10.1016/j.chemosphere.2016.06.060
- Marafi M and Stanislaus . Spent hydroprocessing catalyst management: A review: Part II. Advances in metal recovery and safe disposal methods. Resources, Conservation and Recycling, 2008, 53: 1-26. https://doi.org/10.1016/j.resconrec.2008.08.005
- Wang J, Huang X, Wang L, et al. Kinetics study on the leaching of rare earth and aluminum from FCC catalyst waste slag using hydrochloric acid. Hydrometallurgy, 2017, 171: 312-319. https://doi.org/10.1016/j.hydromet.2017.06.007
- Zhao Z, Guo M and Zhang M. Extraction of molybdenum and vanadium from the spent diesel exhaust catalyst by ammonia leaching method. Journal of Hazardous Materials, 2015, 286: 402-409. https://doi.org/10.1016/j.jhazmat.2014.12.063
- Srichandan H, Singh S, Blight K, et al. An integrated sequential biological leaching process for enhanced recovery of metals from decoked spent petroleum refinery catalyst: A comparative study. International Journal of Mineral Processing, 2015, 134: 66-73. https://doi.org/10.1016/j.minpro.2014.11.002
- Ferella F, Ognyanova A, Michelis ID, et al. Extraction of metals from spent hydrotreating catalysts: Physico-mechanical pre-treatments and leaching stage. Journal of Hazardous Materials, 2011, 192(1): 176-185. https://doi.org/10.1016/j.jhazmat.2011.05.005
- Kim DJ, Ahn JG and Pradhan D. Comparison of Bioleaching Kinetics of Spent Catalyst by Adapted and Unadapted Iron & Sulfur Oxidizing Bacteria - Effect of Pulp Density; Particle Size; Temperature. Journal of Korean Institute of Metal and Materials, 2011, 49(12): 956-966. https://doi.org/10.3365/KJMM.2011.49.12.956
- Srichandan H, Singh S, Pathak A, et al. Bioleaching of metals from spent refinery petroleum catalyst using moderately thermophilic bacteria: Effect of particle size. Journal of Environmental Science and Health, Part A, 2014, 49(7): 807-818. https://doi.org/10.1080/10934529.2014.882211