The effects of electrochemical hydrogenation on coal structure: chemical and macromolecular changes

C. Galan, L.E.A. Berlouis, P.J. Hall

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A set of five coals have been electrochemically hydrogenated and changes to the chemical structure were monitored by elemental analysis and NMR. It was thought that the elemental analysis gave spurious results due to possible hydrogen trapping. The NMR clearly showed a decrease in aromatic material and the creation of aliphatics. Changes to the macromolecular structure following hydrogenation were monitored by measuring changes in: the amount of pyridine soluble material; the amount of volatile material; decrease in glass transition temperatures; and in solvent swelling. The increase in the amount of aliphatic material correlated well with the change in the amount of soluble material and decrease in glass transition temperature. A less perfect correlation was noted between the amount of aliphatic material and the amount of volatile material and no correlation was noted between increase in aliphatics and solvent swelling.
LanguageEnglish
Pages1431-1438
Number of pages7
JournalFuel
Volume79
Issue number12
DOIs
Publication statusPublished - 1 Oct 2000

Fingerprint

Coal
Hydrogenation
Swelling
Nuclear magnetic resonance
Chemical analysis
Pyridine
Hydrogen

Keywords

  • electrochemical hydrogenation
  • coal structure
  • solvent swelling

Cite this

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abstract = "A set of five coals have been electrochemically hydrogenated and changes to the chemical structure were monitored by elemental analysis and NMR. It was thought that the elemental analysis gave spurious results due to possible hydrogen trapping. The NMR clearly showed a decrease in aromatic material and the creation of aliphatics. Changes to the macromolecular structure following hydrogenation were monitored by measuring changes in: the amount of pyridine soluble material; the amount of volatile material; decrease in glass transition temperatures; and in solvent swelling. The increase in the amount of aliphatic material correlated well with the change in the amount of soluble material and decrease in glass transition temperature. A less perfect correlation was noted between the amount of aliphatic material and the amount of volatile material and no correlation was noted between increase in aliphatics and solvent swelling.",
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The effects of electrochemical hydrogenation on coal structure: chemical and macromolecular changes. / Galan, C.; Berlouis, L.E.A.; Hall, P.J.

In: Fuel, Vol. 79, No. 12, 01.10.2000, p. 1431-1438.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The effects of electrochemical hydrogenation on coal structure: chemical and macromolecular changes

AU - Galan, C.

AU - Berlouis, L.E.A.

AU - Hall, P.J.

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Y1 - 2000/10/1

N2 - A set of five coals have been electrochemically hydrogenated and changes to the chemical structure were monitored by elemental analysis and NMR. It was thought that the elemental analysis gave spurious results due to possible hydrogen trapping. The NMR clearly showed a decrease in aromatic material and the creation of aliphatics. Changes to the macromolecular structure following hydrogenation were monitored by measuring changes in: the amount of pyridine soluble material; the amount of volatile material; decrease in glass transition temperatures; and in solvent swelling. The increase in the amount of aliphatic material correlated well with the change in the amount of soluble material and decrease in glass transition temperature. A less perfect correlation was noted between the amount of aliphatic material and the amount of volatile material and no correlation was noted between increase in aliphatics and solvent swelling.

AB - A set of five coals have been electrochemically hydrogenated and changes to the chemical structure were monitored by elemental analysis and NMR. It was thought that the elemental analysis gave spurious results due to possible hydrogen trapping. The NMR clearly showed a decrease in aromatic material and the creation of aliphatics. Changes to the macromolecular structure following hydrogenation were monitored by measuring changes in: the amount of pyridine soluble material; the amount of volatile material; decrease in glass transition temperatures; and in solvent swelling. The increase in the amount of aliphatic material correlated well with the change in the amount of soluble material and decrease in glass transition temperature. A less perfect correlation was noted between the amount of aliphatic material and the amount of volatile material and no correlation was noted between increase in aliphatics and solvent swelling.

KW - electrochemical hydrogenation

KW - coal structure

KW - solvent swelling

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