The effects of phosphoric acid and pyrolysis temperature to the formation of flaky graphite from lignite | Zendy

Sumrit Mopoung | Zendy

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The effects of phosphoric acid and pyrolysis temperature to the formation of flaky graphite from lignite

Author(s) -

Sumrit Mopoung

Publication year - 2011

Publication title -

scientific research and essays

Language(s) - English

Resource type - Journals

ISSN - 1992-2248

DOI - 10.5897/sre10.987

Subject(s) - phosphoric acid , pyrolysis , graphite , materials science , carbon fibers , chemical engineering , nuclear chemistry , metallurgy , chemistry , organic chemistry , composite material , composite number , engineering

The flaky graphites were prepared from lignite. The effects of phosphoric acid ratios and pyrolysis temperatures on flake formation were studied by SEM, TEM and XRD. The results showed that the flaky graphite occurred at a pyrolysis temperature of 600°C with a 1.0:1.0 ratio of carbon to phosphoric acid. The flaky formation was almost completed by pyrolysis at 800°C and with a 1:2.0 ratio of carbon to phosphoric acid. The flaky graphite had a thickness and lateral dimension of about 50 nm and 2 mm. Key words: Flaky graphite, phosphoric acid, pyrolysis temperature, lignite.

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