燃油飛灰中的未燃碳是一種顆粒微細、易隨風飛揚的碳質粉末，易引發環境污染問題，最近研究證實此未燃碳組成的粉末具有如活性碳般的吸附能力，可吸附染料廢水達到脫色之效果，惟其吸附容量偏低，故尚無實際商業利用之實例。因此，本研究參考活性碳之活化製程，對此未燃碳粉末進行物理活化及化學活化實驗，藉以提昇未燃碳對酸性染料的吸附量。

　　研究結果發現，在化學活化方面，未燃碳與一般製造活性碳的碳質原料差異甚大，其碳化程度較一般製造活性碳的碳質原料為高，且幾乎不含焦油等易被活化的成份，所以經KOH、ZnCl2、表面改質等化學活化後，活化藥劑未能滲入未燃碳粉末內，僅略與碳表面反應，產生一些新的表面官能基，因此在碳粒表面結構和比表面積並沒有明顯改變之狀況下，而對染料吸附量有略為提升的現象。另外，在CO2物理活化方面，經CO2處理過後的未然碳粒的表面結構有較顯著的變化，中孔比例明顯提高，使得表面積增加；於950~1100℃活化後，每一處理溫度所得產物的比表面積都有隨著活化時間的增加而提高至一最大值的趨勢，且在處理溫度範圍內，越高溫處理其最大值越高。其中1100℃活化處理前後，比表面積由18 m2/g增為118m2/g，約提高為一般商業活性碳的1/8。由比表面積和吸附量之線性關係，可知比表面積越高對應的染料吸附量也越高，1100℃活化處理後之單位吸附量可提升為420mg/g，約為活性碳的3/4。

　　The unburned carbon from oil-fired fly ash is a kind of carbonaceous powder, which is liable to cause environmental pollution. Recent studies confirm that unburned carbon powder has such adsorptive ability as activated carbon ,and it can adsorb dyeing waste water to decolor . However, the adsorptive amount is small, so there is no example for commercial usage. Therefore, to promote the adsorptive amount of unburned carbon on acid dyes, this study refers to the activation process of activated carbon, and performed physical and chemical activation experiments on unburned carbon powder.

　　The results shoes, on chemical activation, the unburned carbon differs greatly from the commercial activated carbon. Its level of carbonization is higher and it hardly contains activated ingredients like tar. Consequently, through chemical activation such as KOH,ZnCl2,and the modification of surface, the chemical reagents fail to permeate the unburned carbon powder; it reacts slightly to the carbon surface and produces some new surface function groups. Hence, the unburned carbon promotes slightly the adsorptive amount of dyes, under the condition that there is no remarkable change on the surface structure and specific surface area of the unburned carbon. On CO2 physical activation, after the disposal of CO2 ,there are remarkable changes on the surface structure of the unburned carbon powder：the middle-pore proportion obviously raise, and the specific surface area increases. After the activation of 950~1100℃,each product’s specific surface area tends to enlarge to a maximum with the activation time. Among the disposing temperature, the maximum raises with the temperature. At 1100℃, the specific surface area increases from 18 m2/g to 118 m2/g ; the adsorptive amount is one-eighth of the commercial activated carbon . According to the linear relation between surface area and adsorptive amount, we can find that the larger the specific area the higher the adsorptive amount of the dye .After the activation of 1100℃, the adsorptive amount raises to 420 mg/g , about three-fourths of the commercial activated carbon .

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