Hydroisomerization of n -hexane over gallium-promoted sulfated zirconia

Chong Jiang Cao, Song Han, Chang Lin Chen, Nan Ping Xu, Chuny Yuan Mou

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


Gallium-promoted sulfated zirconia (GSZ) catalysts were prepared by impregnation of zirconium hydroxide with aqueous Ga2(SO 4)2 followed by calcination. Isomerization of n-hexane was studied over GSZ at 150 °C, 2.0 MP, WHSV 2 and H2/hexane (molar) ratio of 5. In comparison to sulfated zirconia (SZ), the conversion of n-hexane over Gallium-promoted sulfated zirconia (GSZ) was greatly improved and it remained stable at 85%. In particular, almost all the products were isomers of hexane and the selectivity of 2,2-DMB reached 20%. The results of characterization indicated that the addition of gallium onto SZ catalyst showed little difference in acid strength between SZ and GSZ catalysts while the redox properties of the SZ catalyst changed with addition of gallium. The transformation of SZ crystalline from metastable tetragonal phase, the more active phase, to monoclinic phase was retarded with the addition of gallium. Furthermore, the simultaneous promotion of Pt and Ga brings the production distribution very close to the equilibrium one.

Original languageEnglish
Pages (from-to)511-515
Number of pages5
JournalCatalysis Communications
Issue number10
Publication statusPublished - Oct 2003
Externally publishedYes


  • Gallium-promoted sulfated zirconia
  • n -Hexane isomerization

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Process Chemistry and Technology


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