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Influence of alkali on the carbonization process—II: Carbonization of various coals and asphalt with NaOH

✍ Scribed by Yasumasa Yamashita; Koji Ouchi


Publisher
Elsevier Science
Year
1982
Tongue
English
Weight
576 KB
Volume
20
Category
Article
ISSN
0008-6223

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📜 SIMILAR VOLUMES


Influence of alkali on the carbonization
✍ Yasumasa Yamashita; Koji Ouchi 📂 Article 📅 1982 🏛 Elsevier Science 🌐 English ⚖ 457 KB

Dimethylphenol-formaldehyde resin was carbonized with NaOH. It was found that as the amount of NaOH increases, the temperature of the hydrogen gas evolution is significantly lowered and its amount increases enormously. This is explained by the substitution reactions of H with NaO-groups followed by

Influence of alkali on the carbonization
✍ Yasumasa Yamashita; Koji Ouchi 📂 Article 📅 1982 🏛 Elsevier Science 🌐 English ⚖ 332 KB

The hydroxides of Li, Na, K, Sr and Ba reacted with the resin to produce large amounts of hydrogen and CO. The order of reactivity was, Li < K < Na and Ca, Mg < Sr < Ba. Carbonates evolve only a small amount of hydrogen, although evolution of CO was very large. Carbonates cannot react with reactive

A discussion of the paper “influence of
✍ John Bensted 📂 Article 📅 1991 🏛 Elsevier Science 🌐 English ⚖ 63 KB

Drs Kobayashi and Uno have obtained some very useful results in showing, through accelerated carbonation and exposure tests, that the rate of carbonation of concrete is higher, the greater the alkali content of the cement (1). Such results should not be considered as surprising when the reaction mec