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CO2 에 의한 Char 의 가스화반응시 세공구조 변화
김광호,이선희,조병린,장윤호 한국화학공학회 1987 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.25 No.6
CO₂ 가스화반응에 의해 얻은 호도각 char의 겉보기밀도, 세공반경분포, 세공용적 및 비표면적 등을 추정하여, 가스화방응시 반응온도와 전환율에 따른 char의 세공구조 변화를 조사하였으며, 이론모델(pore volume model, random pore model)과 비교하였다. CO₂ 가스화반응에 의해 형성된 호도각 char는 10Å(micro pore)과 10⁴Å(macro pore) 부근의 세공이 잘 발달된 이원적 구조를 가지고 있었다. 반응 온도가 낮을수록 char의 비표면적과 micro pore 용적은 증가하였으나 macro pore 용적은 변하지 않았으며, random pore model이 가스화반응에 의해 얻은 char의 세공구조값과 비교적 잘 일치하는 것을 알 수 있었다. A char was made from walnut shell which was gasified in CO₂ 7atmosphere and its physical properties such as pore size distribution, density, pore volume and surface area were measured. The effects of reaction temperature and conversion(X_c) on the pore structure change of char were examined and compared with the theoretical values from ihe mathematical modets (pore volume model and random pore model). The char which has bimodal pore distribution near by 10Å (micro pore) and 10⁴Å (macro pore) was obtained by CO₂ gasification reaction. At lower reaction temperatures the surface area (㎡/g-s.m.) and the micro pore volume (㎤/g-s.m.) were increased but the macro pore volume was not affected by the reaction temperatures. It was found that the random pore model was agreed with the pore structure data which were obtained from gasification of the char.