Manutacturing Process of Activated Carbon from Arphalt (II) Preparation of Char from Asphalt by Sulfuric Acid-Solvent Method
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概要
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Propane-deasphalted asphalt (PDA) was sulfonated by sulfuric acid in absence of solvent to get an intermediate product prior to activation from asphalt, so-called char.<BR>Sulfonation of PDA proceeded satisfactorily at 100°C.<BR>The suitable reaction period was one to two hours.<BR>When the concentration of sulfuric acid was higher than 95 wt. % and the weight ratio of sulfuric acid to PDA was seven to one, the yield of char was higher than 120 wt. % based on PDA and its total ion exchange capacity was larger than 3 meq/g.<BR>The more severe the sulfonation conditions were, the more vigorous the oxidation reaction proceeded than the sulfonation reaction, and the contribution of carboxyl or hydroxyl groups to the total ion exchange capacity of char became larger than that of sulfonic groups.
- 一般社団法人 日本エネルギー学会の論文
一般社団法人 日本エネルギー学会 | 論文
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