The active phase (NI 2+) distribution in NI/γ-Al 2O 3 catalysts prepared by impregnation of Bis(ethylenediamine)nickel(II) complexes

Ponminiessary P. Robinson, Vasudevan Arun, Karukapadath K.Abdul Rashid, Chennampilly Ummer Aniz, Karukapadath K.M. Yusuff

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Pore volume and wet impregnations were carried on γ-Al 2O 3 support spheres using [Ni(H 2O) 6](NO 3) 2 and [Ni(en) 2(H 2O) 2]X 2 complexes, where en = ethylenediamine and X = NO - 3 Cl -, or CH 3COO -. The distribution of nickel on the support was studied by optical microscopy and SEM-EDX. The use of ethylenediamine complexes leads to samples with nearly uniform profiles. The distribution is dependent on interaction of complexes with alumina, changes in viscosity during drying, and crystallization volume. Redistribution during drying is minimal for the ethylenediamine complexes. The study illustrates that increase in viscosity retards the convection distribution to outward migration. Cyclohexanol decomposition was studied as a test reaction and the results demonstrate that the macrodistribution of nickel oxide phase influences the product distribution.

Original languageEnglish
Pages (from-to)321-334
Number of pages14
JournalChemical Engineering Communications
Volume199
Issue number3
DOIs
StatePublished - Mar 2012
Externally publishedYes

Keywords

  • Cyclohexanol decomposition
  • Distribution profile
  • Ethylenediamine complexes
  • Impregnation
  • Viscosity

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering

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