Hostname: page-component-78c5997874-v9fdk Total loading time: 0 Render date: 2024-11-15T05:23:13.808Z Has data issue: false hasContentIssue false
  • English
  • Français

Reactions of Clay Volatiles with n-Alkanes

Published online by Cambridge University Press:  02 April 2024

Lisa Heller-Kallai ,
Irena Miloslavski  and
Zeev Aizenshtat
Lisa Heller-Kallai
Affiliation:
Institute of Earth Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
Irena Miloslavski
Affiliation:
Casali Institute of Applied Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
Zeev Aizenshtat
Affiliation:
Casali Institute of Applied Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Volatiles formed on heating clay minerals contain a variety of cations and anions and are highly reactive. Gas chromatograph-mass spectrometer analysis of long-chain n-alkanes exposed to such volatiles showed that some decomposition occurred even <250°C. Reactions with anions donated by the volatiles led to compounds containing atoms other than C and H, e.g., Cl. The products obtained from n-alkanes heated in a stream of clay volatiles to 500°C resembled those produced by corresponding alkane-clay mixtures heated to 250°C. At higher temperatures contact between the alkanes and montmorillonite or halloysite led to changes in the assemblages formed, whereas kaolinite or sepiolite had no effect. Thus, the first reactions that occurred when clays were heated with n-alkanes were apparently induced by the volatiles; at higher temperatures catalysis due to direct contact came into play with some of the clay minerals.

Keywords

AlkaneCatalysisClay volatilesGas chromatographyHalloysiteKaoliniteMass spectrometryMontmorilloniteSepiolite
Type
Research Article
Information
Clays and Clay Minerals , Volume 37 , Issue 5 , October 1989 , pp. 446 - 450
Copyright
Copyright © 1989, The Clay Minerals Society

References

Aizenshtat, Z., 1982 Thermal evaluation of bituminous rocks and pyroproducts Israel J. Chem 22 266 – 272.CrossRefGoogle Scholar
Heller-Kallai, L. and Mackenzie, R. C., 1987 Effect of volatiles from kaolinite on calcite dissolution: DTA evidence Clay Miner 22 349 – 350.CrossRefGoogle Scholar
Heller-Kallai, L., Miloslavski, I. and Aizenshtat, Z., 1987 Volatile products of clay mineral pyrolysis revealed by their effect on calcite Clay Miner 22 339 – 348.CrossRefGoogle Scholar
Heller-Kallai, L., Miloslavski, I. and Aizenshtat, Z., 1988 Chemical and mass spectrometric analysis of volatiles derived from clay Amer. Mineral 73 376 – 382.Google Scholar
Keller, W. D., 1986 Composition of condensates from heated clay minerals and shales Amer. Mineral 71 1420 – 1425.Google Scholar