Determination of the optimum NiS fire assay parameters for platinum in catalytic converters

Mehmet Hakan Morcali, Suleyman Akman, Onuralp Yucel

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The nickel sulfide (NiS) fire assay has been used to quantify, platinum (Pt) in catalytic converters. The use of various flux materials and the effects of different parameters such as quantity of flux, flux mixture ratio (i.e. B2O3:Na2O ratio) and temperature were compared on Pt recovery. The fire assay buttons were characterized using different techniques such as Atomic absorption spectrometer (AAS) and inductively coupled plasma mass spectrometry (ICP-MS). We found that the optimum condition to recover Pt was achieved with the use of 57.5 g flux (sodium tetraborate + sodium carbonate), 5 g Ni (as 6.36 g NiO), and 5 gS° per five gram of sample at 900°C. The recovery of Pt after an hour was, 95%. It is proposed that a method to isolate at least 95% of the Pt present in catalytic converters using NiS fire assay.

Original languageEnglish
Title of host publicationTMS 2014 - 143rd Annual Meeting and Exhibition, Supplemental Proceedings
PublisherMinerals, Metals and Materials Society
Pages1117-1124
Number of pages8
ISBN (Print)9781118889725
DOIs
Publication statusPublished - 2014
Event143rd Annual Meeting and Exhibition, TMS 2014 - San Diego, CA, United States
Duration: 16 Feb 201420 Feb 2014

Publication series

NameTMS Annual Meeting

Conference

Conference143rd Annual Meeting and Exhibition, TMS 2014
Country/TerritoryUnited States
CitySan Diego, CA
Period16/02/1420/02/14

Keywords

  • Catalytic converters
  • Fire assay
  • Nickel sulfide
  • Platinum

Fingerprint

Dive into the research topics of 'Determination of the optimum NiS fire assay parameters for platinum in catalytic converters'. Together they form a unique fingerprint.

Cite this