阔叶材木炭水蒸气活化的最佳工艺条件的研究

<正>试验表明:水蒸气用量的变化对活性炭的亚甲蓝脱色力的影响特别显著;活化温度和活化时间有显著影响;所有这些条件对活性炭的得率都有特别显著的影响。市售阔叶材木炭制取脱色力较高的活性炭(0.15％亚甲蓝溶液170ml/g)的最佳条件为:水蒸气用量1:1.31——干炭(g):水(ml);活化温度900℃;活化时间4h;活性炭得率为15.1％。从市售阔叶材木炭制取得率较高(达44.2％)的亚甲蓝脱色力为110ml/g的活性炭可用水蒸气(1:0.87)在850℃活化2h。

A STUDY ON OPTIMUM TECHNOLOGICAL CONDITIONS FOR ACTIVATING HARDWOOD CHARCOAL WITH STEAM

Experiments showed that the variations of the amount of steam, temperature and time has great effects on the decoloring power for methylene blue and yield of activated carbon obtained from commercial hardwood charcoal by steam.Activated carbon with improved decoloring power 170ml/g of 0.15% methylene blue solution obtained from commereial hardwood charcoal are manufactured in the following optimum conditions: amount of steam l:1.31-charcoal(g): H2O (ml); activation temperature 900℃; activation time 4 hrs. Then the yield of activated carbon is 15%, and 44% of activated carbon with methylene blue absorptivity 110ml/g could be obtained from commercial hardwood charcoal by activation with steam(1:0.87) at the temperature of 850℃ for 2hsr.