97/00076 Effect of coal preoxidation on the development of microporosity in activated carbons

• Publisher: Elsevier Science
• Year: 1997
• Weight: 191 KB
• Volume: 38
• Category: Article
• ISSN: 0140-6701
• DOI: 10.1016/s0140-6701(97)89870-0

✦ Synopsis

0 1 Solid fuels (preparation) 97100076 Effect of coal preoxidation on the development of microporosity in activated carbons P;trra. .I B. ('t ul.. C01%)0)1. lY9h. 34, (h), 7X3-787. This paper looks at the preparation of activated carbons from a \emtanthracite preoxldized in air to different degrees. The activation was carried out in steam at X50 to SO f I% burnoff. The adsorption isotherms of nitrogen at 77 K and carbon dioxide at 273 K were given. The adsorption isotherms indicate th:lt the activated carbons obtained from non-oxidized coal have poor portrsity, hut the porosity increased with increase in the degree of coal preoxidation. The BET surface area increase\ from lht) m'/p in the cast of activated carbon from oxidized coal char. The result5 give t-plot\ that show that the degree of oxidation enhances both small and medium microporosity, the increase in small microporosity being much larger. The activated carbons obtained from preoxidizcd coal chars are Iargcly microporous in character. 97100077 Energy-chemical coal processing. 2. Influence of coal quality on the yield of target products and energy efficiency of coal conversion to coke, methanol, heat and energy through intermediate gasification Gudkov. A. V. ('I cl/.. Clrcsr~. Su,srcrirtcrhlc Detr., IYYh, 4. (I ). 50-64.

This paper focuser on the influence of chemical composltion of raw coal% on thclr complex prtrcccsing to methanol, coke. heat. electricity through gasification.

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