Characterization and modification of Indonesian natural zeolites and their properties for hydrocracking of a paraffin

Wega Trisunaryanti, Ryuhei Shiba, Masahiro Miura, Masakatsu Nomura*, Norikazu Nishiyama, Masahiko Matsukata

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Attempting to utilize natural zeolites as catalysts, characterization and modification of two kinds of those produced in Indonesia (Z1 and Z2) were carried out and their properties for hydrocracking of paraffins were evaluated using n-hexadecane as a petroleum model compound. The Z1 and Z2 samples were first treated with 6 N HCl at 90°C for 0.5 h or 20 h. X-Ray diffraction analysis of the HCl-treated samples (Z1-0.5 h, Z2-0.5 h, Z1-20 h, and Z2-20 h), as well as Z1 and Z2, indicated that both original samples mainly consist of mordenite type crystalline matter and the acid treatment removes some of crystalline impurities X-Ray fluorescence data revealed that Z1 and Z2 have Si/Al ratios of 4.3 and 3.1, respectively, and the treatment increases the ratio by dealumination as expected. The examination of hydrocracking properties showed that Z1 and Z2 have similar catalytic properties and the acid treatment considerably improves their activities. On the other hand, Z1- and Z2-20 h were less active than were Z1- and Z2-0.5 h, respectively. NH3-TPD and 29Si MAS NMR suggested that this may be due to the significant decrease of active acid sites by the prolonged treatment. It was also found that the loading of a small amount of nickel (0.8 wt%) onto Z1-0.5 h by ion exchange, significantly improves the catalytic property; the conversion of the paraffin was comparable with that using a synthetic H-mordenite.

Original languageEnglish
Pages (from-to)20-25
Number of pages6
JournalSekiyu Gakkaishi (Journal of the Japan Petroleum Institute)
Issue number1
Publication statusPublished - 1996
Externally publishedYes

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology


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