中孔洞高比表面積活性碳之開發與應用

Preparation of high-surface-area mesoporous activated carbon

吳耀閔(Yao-Min Wu)

指導教授 ： 黃昭銘

崑山科技大學/工程學院/環境工程研究所/碩士(2011年)

摘要

本研究以尿素-間苯二酚-甲醛為碳前驅物，搭配三區塊共聚物界面活性劑(P123)，以自組裝方式製備中孔洞活性碳，探討製備方式對甲基藍、亞甲基藍和苯、丙酮的動態吸附能力之影響。研究結果發現未經KOH 化學活化時，碳材表面積約500 m2/g、孔體積約0.8 cm3/g 及孔洞約12 nm；經KOH化學活化後，活性碳表面積約1300~ 1600 m2/g、孔體積約0.4 ~0.9 cm3/g 及孔洞約8~ 12 nm。URF-AC經過KOH活化之比例為4:1可得到最高的比表面積1672.8 m2/g，其對甲基藍溶液吸附量可達3232.0 mg/g-吸附劑而亞甲基藍溶液吸附量可達3068.8 mg/g-吸附劑，而苯動態吸附之吸附量可達306 mg/g、丙酮動態吸附之吸附量可達133 mg/g。本研究發現吸附量的多寡決定於整體微孔的數量，比表面積的大小與吸附量成正比關係，而吸附效率則由孔體積與孔徑大小所影響。

關鍵字

中孔洞活性碳

並列摘要

This research used Urea-Resorcinol-Formaldehyde as carbon precursor and tri-polymer interface activator, and home-made equipment to manufacture activated carbon in medium-size cavities for studying the effect of manufacturing process on dynamic adsorption power of methyl blue, methylene blue, benzene and acetone. The study results showed that before being activated by KOH, the surface area of carbon material was about 500 m2/g; cavity volume was about 0.8 cm3/g; cavity size was about 12 nm; after being activated by KOH, the surface area of the activated carbon became about 1300~1600 m2/g; cavity volume was about 0.4~0.9 cm3/g; cavity size was about 8~12 nm. After being activated with KOH, URF-AC ratio at 4:1 had the highest specific surface area 1672.8 m2/g, the adsorption amount of methyl blue liquid reaches 3232.0 mg/g of adsorbent; methylene blue liquid was 3068.8 mg/g of adsorbent; benzene was 306 mg/g; acetone was 133 mg/g. This research discovered that the adsorption is determined by the amount of cavities; and is proportional to specific surface area, and adsorption efficiency is affected by the cavity volume and size.

並列關鍵字

mesoporous activated carbon

參考文獻

1. 洪珮珮，「半導體製程健康在危害簡介」，勞工安全衛生研究所，(1995) 11。

4. F. Rodríguez-Reinoso, M. Molina-Sabio, M.T. Gonzalez, Use of steam and CO2 as activating agents in the preparation of activated Carbons, Carbon, 33 (1995) 15.

5. T. Wigmans, Industrial aspects of production and use of activated carbons, Carbon, 27 (1989) 13.

6. F. Caturla, M. Molina-Sabio, F. Rodríguez-Reinoso, Preparation of activated carbon by chemical activation with ZnCl2, Carbon, 29 (1991)

8. T. Kyotani, Control of pore structure in carbon, Carbon, 38 (2000) 269.