Refining Waste Spent Hydroprocessing Catalyst and Their Metal Recovery
Catalysts play an important role in producing valuable fuel products in petroleum refining; but, due to feedstock’s impurities catalyst gets deactivated with carbon and metal deposition. The disposal of spent catalyst falls under the category of hazardous industrial waste that requires strict agreement with environmental regulations. The spent hydroprocessing catalyst contains Mo, V and Ni at high concentrations that have been found to be economically significant for recovery. Metal recovery process includes deoiling, decoking, grinding, dissolving and treatment with complexing leaching agent such as ethylene diamine tetra acetic acid (EDTA). The process conditions have been optimized as a function of time, temperature and EDTA concentration in presence of ultrasonic agitation. The results indicated that optimum condition established through this approach could recover 97%, 94% and 95% of the extracted Mo, V and Ni, respectively, while 95% EDTA was recovered after acid treatment.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1132553Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 985
 Global Hydroprocessing Catalyst (HPC) Market (2015): An Analysis, http://www.researchandmarkets.com/reports/1958130/
 World Refining Catalyst Market, The Catalyst Group Resources; The Intelligence Report, May 2014.
 M. Marafi, A. Stanislaus, E. Furimsky, Handbook of Spent Hydroprocessing Catalysts: Regeneration, Rejuvenation, Reclamation, Environment and Safety, 2nd edition, Elsevier, 2017.
 M.S. Rana, J. Ancheyta, S.K. Sahoo, P. Rayo, Carbon and metal deposition during the hydroprocessing of Maya crude oil, Catal. Today 220-222, 97-105, 2014.
 M. Marafi, A. Stanislaus, Options and processes for spent catalyst handling and utilization. J. Hazardous Materials, 101, 123-132, 2003.
 M. Marafi & M. S. Rana, Refinery waste: the spent hydroprocessing catalyst and its recycling options, WIT Transactions on Ecology and The Environment 202, 219-230, 2016.
 M. Marafi, S. Al-Omani, H. Al-Sheeha, A. Stanislaus, Utilization of metal-fouled spent residue hydroprocessing catalyst in the preparation of an active HDM catalyst, Ind. Eng. Chem. Res. 46, 1968-1974, 2007.
 M. Marafi, A. Stanislaus, Spent catalyst waste management: A review: Part II-Advances in metal recovery and safe disposal method, Res., Cons. and Rec., 53, 1-26, 2008.
 E. Furimsky, F. E. Massoth, Deactivation of hydroprocessing catalysts, Catal. Today, 52, 381-495, 1999.
 M.S. Rana, V. Samano, J. Ancheyta, J.A.I. Diaz, A review of recent advances on process technologies for upgrading of heavy oils and residua. Fuel, 86, 1216-1231, 2007.
 S. Goel, K.K. Pant, K.D.P. Nigam, Extraction of nickel from spent catalyst using fresh and recovered EDTA, Journal of Hazardous Materials 171, 253-261, 2009.
 A. E. Martell, R.M. Smith, 2004. NIST Standard Reference Database 46 Version 8.0. NIST Critically Selected Stability Constants of Metal Complexes Database.US Department of Commerce, National Institute of Standards and Technology
 M. Marafi, Method for recovering Mo, V. Ni, Co and Al from spent catalyst using ultrasonic assisted leaching with EDTA, US Patent 2012/0111150 A1.
 M. Marafi, A. Stanislaus, Alumina from reprocessing of spent hydroprocessing catalyst. Catal. Today, 178, 117-123, 2011.