흡수제와 흡착제를 이용한 저농도 CO2 및 VOCS 제거 기술

Alternative Title
Removal Technology of Low Concentration CO2 and VOCS Using Absorbents and Adsorbents
Author(s)
박일건
Alternative Author(s)
Park Il Gun
Advisor
홍민선
Department
일반대학원 환경공학과
Publisher
The Graduate School, Ajou University
Publication Year
2013-08
Language
kor
Keyword
흡수제흡착제저농도 CO2저농도 VOC
Abstract
기후변화를 야기하는 CO2와 VOCS의 처리기술은 퍼센트(%) 수준의 산업체 배출가스에 초점이 맞추어져 왔다. 이에 본 논문에서는 지하상가, 지하도, 실내공간 등에 적용이 가능한 ppm 수준의 CO2와 VOCS을 흡수제와 흡착제를 이용해 처리하는 기술을 개발하였다. 알카놀아민과 650 ppm의 CO2 흡수 실험에서는 MEA 농도가 1 wt%, 2 wt%, 3 wt% 증가 시 CO2 흡수량은 0.34 mol-CO2/mol-absorbent, 0.32 mol-CO2/mol- absorbent, 0.30 mol-CO2/mol-absorbent로 감소하였고, AMP 농도가 1 wt%, 2 wt%, 3 wt% 증가 시 CO2 흡수량은 0.32 mol-CO2/mol-absorbent, 0.30 mol-CO2 /mol-absorbent, 0.28 mol-CO2/mol-absorbent로 감소하였다. 혼합흡수제의 경우 MEA 0.5 wt%와 AMP 0.5 wt%을 혼합했을 때 0.52 mol-CO2/mol-absorbent로 최대치를 나타냈다. 알카놀아민을 이용한 벤젠, 톨루엔 흡수 실험에서는 흡수량이 미비하였다. 제올라이트 5A, 13X, 활성탄소섬유 그리고 활성탄을 이용한 CO2 흡착량은 CO2 700 ppm에서 각각 21 mg-CO2/g-adsorbent, 12 mg-CO2/g-adsorbent, 18 mg- CO2/g-adsorbent, 6 mg-CO2/g-adsorbent으로 나타났으며, 열재생 반복실험 결과에서 제올라이트 5A가 가장 우수한 흡착 성능을 보여주었다. 또한, 흡착제의 저농도 VOC 흡착 특성 결과 활성탄소섬유가 50 ppm 벤젠의 경우 71 mg- benzene/g-adsorbent 그리고 10 ppm 톨루엔의 경우 21 mg-toluene/g-adsorbent로 제올라이트 5A, 제올라이트 13X 그리고 활성탄에 비해 흡착성능이 가장 높은 것으로 나타났다.
Alternative Abstract
Many techniques were developed for percent level CO2 and VOCS capture and storage from flue gases, which gases are assumed to cause global warming. In the thesis, different types of absorbents and adsorbents were utilized to capture ppm level CO2 and VOCS, which level represent air qualities inside residential and commercial areas. An absorption and reaction characteristics of low CO2 at 650 ppm and alkanolamines were investigated. As MEA concentrations increase 1, 2 and 3 wt%, CO2 loadings decrease 0.34 mol-CO2/mol-absorbent, 0.32 mol-CO2/ mol-absorbent and 0.3 mol-CO2/mol-absorbent, respectively. Also, CO2 loadings decrease from 0.32 mol-CO2/mol-absorbent, 0.30 mol-CO2/mol-absorbent and 0.28 mol-CO2/mol-absorbent as AMP concentrations increase 1, 2 and 3 wt%. Experimental results with blending solutions show that CO2 loading was the highest, 0.52 mol-CO2/mol-absorbent, when 0.5 wt% MEA and 0.5 wt% AMP were blended. Amine solutions are inadequate to capture benzene and toluene as experimental results show. Four types of adsorbents were examined in cyclic CO2 adsorption and thermal regeneration. Adsorption capacities of zeolite 5A, zeolite 13X, activated carbon fiber and activated carbons were 21 mg-CO2/g-adsorbent, 12 mg-CO2/g- adsorbent, 18 mg-CO2/g-adsorbent and 6 mg-CO2/g-adsorbent, respectively when exposed to 700 ppm CO2. Zeolite 5A shows the highest adsorption capacities after cyclic thermal regeneration. In case of VOCS, adsorption capacities of activated carbon fibers were the highest with 71 mg-benzene/g-adsorbent and 21 mg-benzene/g-adsorbent when exposed to 50 ppm benzene and 10 ppm toluene.
URI
https://dspace.ajou.ac.kr/handle/2018.oak/8480
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Graduate School of Ajou University > Department of Environmental Engineering > 3. Theses(Master)
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