The Odor-causing compounds from grilled meat restaurants are mainly ammonia, aldehydes, and volatile organic compounds (VOCs). Acetaldehyde is known to have the greatest odor contribution. This study examines the application of silica gel for acetaldehyde in gas stream. Heat-pretreated silica gel showed relatively good adsorption performance and at 150oC, its breakthrough capacity reached up to 51 mg/g. By using Thomas' dynamic model, which well estimated the adsorption performance in this study, the effects of inlet concentration and retention time on adsorption capacity were evaluated. The adsorbent saturated with acetaldehyde was regenerated by reducing the pressure, which was controlled by the vacuum pump. The design factors were found to be 10 sec−1 of space velocity, -184 kPa·hr of desorption condition, and 10 to 1 of the ratio of cross sectional area to the height for the fixed-bed. The cyclic operation of adsorption and desorption step in the fixed bed packed with silica gel appeared to have 7.0-8.8 mg/g of acetaldehyde removal capacity and 99% of regeneration.

Abstract
1. 서 론
2. 실험재료 및 방법
    2.1 아세트알데하이드 흡착 실험
    2.2 분석방법
3. 결과 및 고찰
    3.1 아세트알데하이드 흡착특성
    3.2 표면 열처리에 의한 흡착제 전처리
    3.3 실리카겔의 아세트알데하이드 흡착 동역학
    3.4. 실리카겔 재생 및 연속운전
4. 결 론
References

• 노규영(서울과학기술대학교 환경공학과) | Gyuyeong Noh (Department of Environmental Engineering, Seoul National University of Science and Technology)
• 김대근(서울과학기술대학교 환경공학과) | Daekeun Kim (Department of Environmental Engineering, Seoul National University of Science and Technology) Corresponding author