Recovery of nickel oxide from spent catalyst

✍ Scribed by N.M Al-Mansi; N.M Abdel Monem

• Book ID: 108474486
• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 147 KB
• Volume: 22
• Category: Article
• ISSN: 0956-053X
• DOI: 10.1016/s0956-053x(01)00024-1

✦ Synopsis

This study investigates the possibility of recovering nickel from the spent catalyst (NiO/Al 2 O 3 ) resulting from the steam reforming process to produce water gas (H 2 /H 2 O) in many industries. In the extraction process, nickel is recovered as sulfate using sulfuric acid as a solvent. The considered parameters affecting nickel recovery were acid concentration, temperature and time of digestion solid:liquid ratio, particle size and stirring rate. Nickel was to be directly recovered as a sulfate salt by direct crystallization method. The conversion was 99% at 50% sulfuric acid concentration, solid: liquid ratio (1:12) by weight, particle size less than 500 micron for more than 5 h and 800 rpm at 100 C.