牛糞固形物產製活性碳之評估

本研究之目的為利用牛糞含碳量高之特點，探討以牛糞製備活性碳之可行性。試驗使用經水車式固液分離後之牛糞，以不同活化劑（磷酸與氯化鋅）探討於碳化溫度300－700℃下經不同碳化時間對牛糞製成活性碳之產率、碘值吸附量與比表面積之影響。試驗結果顯示以牛糞產製活性碳，其產率隨著溫度升高而降低，磷酸處理組在碳化溫度500－600℃時產率較氯化鋅處理組者高。牛糞以兩種活化劑處理後於碳化溫度500℃下，經30分鐘碳化時間可得最佳碘值吸附量（721－946 mg/g）與比表面積（582－948 m^2/g）之活性碳產物，氯化鋅處理組之活性碳碘值與比表面積都較磷酸處理組者為高。綜上所述，利用氯化鋅或磷酸作為牛糞碳化之活化劑，製成之活性碳品質與市售活性碳品質相當。

關鍵字

牛糞；活性碳；化學活化

並列摘要

The purpose of this study was to evaluate the feasibility of preparation of activated carbon from high-carbon-content cattle manure. Cattle manure from solid-liquid separation of dairy wastewater was used as raw material and it was carbonized with ZnCl_2 or H_3PO_4 under 300-700℃ for 30 or 60 min, then the yield, iodine value and surface area were evaluated. The results showed that yield decrease significantly with increase in activation temperature. The yields of H_3PO_4-activated carbon corbonization at 500-600˚C were higher than those of ZnCl_2-activated carbon. The activated carbon was better in iodine number (721-946 mg/g) and surface area (582-948 m^2/g) from cattle manure on chemical activation treatment under 500℃ for 30 min. The iodine number and surface area of ZnCl_2 activated carbon were higher than those of H_3PO_4 activated carbon. In conclusion, using ZnCl_2 or H_3PO_4 as activating agents, the quality of activated carbon prepared hour was equivalent to that of commercial cattle manure products.

並列關鍵字

Cow manure ； Activated carbon ； Chemical activation

國際替代計量

牛糞固形物產製活性碳之評估

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