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Study of biological extraction kinetics of heavy metals from spent catalyst using thermophilic bacteria

Gerayeli, F ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. Publisher: 2012
  3. Abstract:
  4. An enormous amount of catalysts are consumed in oil refineries during refining processes. The batch bioleaching kinetics of spent hydrocracking spent catalyst was investigated. Four significant factors in bioleaching, i.e., pH, pulp density, inoculation, and elemental sulfur, were realized among 10 key factors using Plackett-Burman factorial design. The best conditions for getting maximum efficiency in bioleaching process were determined. Second-order polynomial models were also developed to find the impact of four variables on metal recovery. The predicted recoveries from these models agreed with experimental results in optimal conditions for aluminum, molybdenum, and nickel. Diffusion through product layer is the rate limiting step. This is an abstract of a paper presented at the CHISA 2012 - 20th International Congress of Chemical and Process Engineering and PRES 2012 - 15th Conference PRES (Prague, Czech Republic 8/25-29/2012)
  5. Keywords:
  7. Source: CHISA 2012 - 20th International Congress of Chemical and Process Engineering and PRES 2012 - 15th Conference PRES ; 2012