Activated carbons were prepared from Korean coal by steam activation in this study. The variation of pore structure of the activated carbons were investigated according to different carbonization temperatures. Yield, surface area, pore volume and pore structure of this activated carbon were compared with those of activated carbon prepared without carbonization. The investigated carbonization temperature ranged from 700℃ to 1,000℃. Carbonization was carried out in nitrogen atmosphere for 70 minutes and activation was performed by steam at 950℃ for 210 minutes. Surface area and pore volume of the resulting activated carbons increased with carbonization temperature. Also pore volume increased by 20% compared to the activated carbon without carbonization. Especially, in mesopore region, the activated carbon carbonized at 900℃ had more pores by 60% than that of activated carbon carbonized at other temperature.

Activated carbons were prepared from Youngwall coal by steam activation in this study. The feasibility of the Youngwall coal to commercial activated carbon was examined. The variation of pore structures and the development of porosity in activated carbons were investigated by changing activation conditions in batch type apparatus. The values of BET surface area and adsorption capacity of iodine and methylene blue of the resulting activated carbons were obtained as high as 1,000㎡/g, 900㎎/g, 150㎖/g, respectively. Youngwall activated carbon prepared in this study showed much higher pore volume in pore diameter over l0Å than that of commercial reference activated carbon(Ningxia Taihua ZJ-15C) produced from China anthracite.

NAPL로 오염된 토양이나 지하수에 스팀을 주입하여 제거하는 과정을 모의하는 수치모형은 다양한 현장상황에서의 적절한 작업조건을 설계·평가하는데 매우 유용한 도구가 될 수 있다. 스팀주입에 의한 NAPL 제거과정을 다상, 다요소 시스템의 비등온 과정으로 기술하는 지배방정식에 기초한 T2VOC를 이용하여 1 및2차원상황에 대하여 수치해석을 수행하였다. 1차원의 경우 수치해는 실험상 어려움으로 인한 편차를 제외하고는 실험에서 얻은 컬럼내 온도분포와 비교적 좋

스팀의 온도와 압력을 이용하여 불수용성 유기화합물(NAPL)로 오염된 토양의 정화가능성을 알아보기 위한 실험을 수행하였다. Octane, Toluene, Xulene과 같은 단일 NAPL인 Gasoline을 대상으로 실험을 수행하였으며, 사용된 토양은 주문진 표준사와 국내 지반에 많인 산재하는 화강토를 선택하였다. 실험결과 1 pore volume의 스팀주입으로 인한 NAPL제거율은 모래의 경우 66∼78%, 화강토의 경우는 45∼73%로 나타나 상대적