Selective hydrogen cyanide synthesis from CFC12 (CCl2F2) and ammonia over metal catalysts supported on LaF3 and activated charcoal

Yusaku Takita, Takeshi Imamura, Yukako Mizuhara, Yumi Abe, Tatsumi Ishihara

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The applicability of supports such as LaF3, activated charcoal and Cr2O3 to the new reaction, CCl2F2 + 5 3NH3→HCN + 2HCl + 2HF + 1 3N2 was examined and it was found that TiO2 itself reacted with CFC12 to give carbon monoxide and carbon dioxide even at 673 K in addition to hydrogen cyanide formation. LaF3 did not react with CFC (chlorofluorocarbon) even at 823 K so that it could be considered suitable for use as a catalyst support. Au(1 wt.-%)/LaF3 and Pt(1 wt.-%)/LaF3 were effective for hydrogen cyanide formation and hydrogen cyanide selectivity reached 77-78% at 823 K. Activated charcoal was also suitable for use as a catalyst support and hydrogen cyanide was formed selectively (72-84%) over Rh(1 wt.-%)/AC and Pd(1 wt.-%)/AlF3/AC catalysts at 823 K.

Original languageEnglish
Pages (from-to)79-87
Number of pages9
JournalApplied Catalysis B, Environmental
Volume1
Issue number2
DOIs
Publication statusPublished - Jun 26 1992
Externally publishedYes

Fingerprint

Hydrogen Cyanide
Charcoal
Cyanides
cyanide
Ammonia
Catalyst supports
charcoal
Activated carbon
ammonia
Metals
catalyst
hydrogen
Hydrogen
metal
Chlorofluorocarbons
CFC
Carbon Monoxide
Carbon Dioxide
carbon monoxide
Carbon monoxide

All Science Journal Classification (ASJC) codes

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

Cite this

Selective hydrogen cyanide synthesis from CFC12 (CCl2F2) and ammonia over metal catalysts supported on LaF3 and activated charcoal. / Takita, Yusaku; Imamura, Takeshi; Mizuhara, Yukako; Abe, Yumi; Ishihara, Tatsumi.

In: Applied Catalysis B, Environmental, Vol. 1, No. 2, 26.06.1992, p. 79-87.

Research output: Contribution to journalArticle

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AB - The applicability of supports such as LaF3, activated charcoal and Cr2O3 to the new reaction, CCl2F2 + 5 3NH3→HCN + 2HCl + 2HF + 1 3N2 was examined and it was found that TiO2 itself reacted with CFC12 to give carbon monoxide and carbon dioxide even at 673 K in addition to hydrogen cyanide formation. LaF3 did not react with CFC (chlorofluorocarbon) even at 823 K so that it could be considered suitable for use as a catalyst support. Au(1 wt.-%)/LaF3 and Pt(1 wt.-%)/LaF3 were effective for hydrogen cyanide formation and hydrogen cyanide selectivity reached 77-78% at 823 K. Activated charcoal was also suitable for use as a catalyst support and hydrogen cyanide was formed selectively (72-84%) over Rh(1 wt.-%)/AC and Pd(1 wt.-%)/AlF3/AC catalysts at 823 K.

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