이에 본 연구에서는 음식물쓰레기 , 폐수처리시 발생하는 H2S, CH3SH을 선택적으로 흡착할 수 있는 하수슬러지 탄화물 흡착제를 이용하여 흡착평형실험으로서 온도, 압력에 따른 평형흡착량을 구하고 등온흡착모델식에 적용시켜 흡착제의 최대흡착량(qm), 흡착상수(b), 흡착용량(K), 흡착강도(n)를 구하여 흡착제의 흡착특성을 살펴보고자 한다. 또한 고정흡착층에서 H2S와 CH3SH의 각각의 흡착특성을 흡착 온도, 주입가스농도, ...
이에 본 연구에서는 음식물쓰레기 , 폐수처리시 발생하는 H2S, CH3SH을 선택적으로 흡착할 수 있는 하수슬러지 탄화물 흡착제를 이용하여 흡착평형실험으로서 온도, 압력에 따른 평형흡착량을 구하고 등온흡착모델식에 적용시켜 흡착제의 최대흡착량(qm), 흡착상수(b), 흡착용량(K), 흡착강도(n)를 구하여 흡착제의 흡착특성을 살펴보고자 한다. 또한 고정흡착층에서 H2S와 CH3SH의 각각의 흡착특성을 흡착 온도, 주입가스농도, aspect ratio(L/D)를 실험변수로 하여 흡착능에 미치는 영향을 살펴보고, 이성분 혼합기체를 대상으로 경쟁흡착이 이뤄지는 두성분의 파과시간과 흡착량을 산출 하여 흡착특성을 비교해 보고 제조된 흡착제를 일반 활성탄과 비교, 분석함으로 악취가스 제거용 흡착제로써의 활용 가능성을 제시하고자 한다.
이에 본 연구에서는 음식물쓰레기 , 폐수처리시 발생하는 H2S, CH3SH을 선택적으로 흡착할 수 있는 하수슬러지 탄화물 흡착제를 이용하여 흡착평형실험으로서 온도, 압력에 따른 평형흡착량을 구하고 등온흡착모델식에 적용시켜 흡착제의 최대흡착량(qm), 흡착상수(b), 흡착용량(K), 흡착강도(n)를 구하여 흡착제의 흡착특성을 살펴보고자 한다. 또한 고정흡착층에서 H2S와 CH3SH의 각각의 흡착특성을 흡착 온도, 주입가스농도, aspect ratio(L/D)를 실험변수로 하여 흡착능에 미치는 영향을 살펴보고, 이성분 혼합기체를 대상으로 경쟁흡착이 이뤄지는 두성분의 파과시간과 흡착량을 산출 하여 흡착특성을 비교해 보고 제조된 흡착제를 일반 활성탄과 비교, 분석함으로 악취가스 제거용 흡착제로써의 활용 가능성을 제시하고자 한다.
with the char made by a thermal decomposition of sewage sludge, we made an absorbent to find out adsorption characteristic on H2S and CH3SH odor gas through conducting and experiment on isothermal adsorption, adsorbed temperature, gas concentration, and aspect ratio.
1. This study showed th...
with the char made by a thermal decomposition of sewage sludge, we made an absorbent to find out adsorption characteristic on H2S and CH3SH odor gas through conducting and experiment on isothermal adsorption, adsorbed temperature, gas concentration, and aspect ratio.
1. This study showed that when we examined the physical characteristic of manufactured absorbent, its iodide adsorption capacity was 652.1 mg/g and its specific surface area was 525.38 m2/g as you can see from Table 4.3. It means if the main component of an in organic substance, or SiO2 is removed, we can have good properties. The development structure of pore was high in the pore distribution around 2nm. In addition, the micropore developed around 2.36nm, or Average pore diameter. That's why we need further study on micropore to improve the capacity of an absorbent
2. As H2S and CH3SH partial pressure varied from 0.001atm to 0.02atm, H2S and CH3SH amount increased with the partial pressure. At the different temperature of 20℃, 40℃, and 60℃, we studied adsorption equilibrium. With the result we got, Langmuir's and Freundlich adsorption isotherm were used for regression analysis. We found that the maximum adsorbed amount ad reaction velocity increased with the rise of temperature. Plus, the adsorbed amount and intensity also increased. It means the absorbent was more active in chemical adsorption than in physical adsorption and so adsorption capacity rose in high temperature.
3. To study adsorption characteristic, we conducted an experiment with fixed reactor as aspect ratio(L/D) varied 0.5, 1.0 and 1.5. We got the result that adsorption capacity decreased dramatically if L/D was 0.5 ; a similar capacity was observed between L/D was 1.5 and L/D was 1.0. Therefore the optimum L/D ratio could be 1.0
4. As gas concentration varied from 200 to 600 ppm, the experiment was performed to find out the effect on the adsorption capacity. The adsorption capacity increased with gas concentration and the increase rate was lowered above 400 ppm
5. Comparing the base activated carbon, impregnated activated carbon showed 30 min, 40min, 68min of the longer H2S breakthrough time, and 0.14 mmole/g, 0.16mmole/g 0.19mmole/g of better adsorption capacity at the temperature of 20℃, 40℃, and 60℃ separately. Although CH3SH breakthrough time showed shorter breakthrough time than H2S ; 48min, 85min, and 110min of breakthrough time and 0.273 mmole/g, 0.283 mmole/g, 0.310 mmole/g of adsorption capacity, it improved better adsorption capacity by 1.8 times.
6. The manufactured absorbent was under a simultaneous adsorption with hydrogen sulfide and methylmercaptan. The result showed that the arrival times of both hydrogen sulfide and methylmercaptan were increased to 100min and 172min respectively. When it comes to adsorption amount, hydrogen sulfide rose by 1.8times ; methylmercaptan, 1.5 times. It is considered that a catalytic action appears when we remove both hydrogen sulfide and methylmercaptan. It means we got the same result from Turk's and Rago's.
7. When we compared the produced absorbent with commercial activated carbon, the breakthrough time of the absorbent was 0.8 times in hydrogen sulfide as long as activated carbon and 0.87 times in methylmercaptan. As to adsorbent amount, it was 77%(hydrogen sulfide) and 80%(methylmercaptan) of commercial activated carbon. The reason it showed highly efficient performance is that physical adsorption and chemical adsorption were conducted at the same time.
The absorbent that we used in this study was from sewage sludge dumped away by ocean abandonment. We found that it has a potential that might remove hydrogen sulfide and methylmercaptan. From the near future, the study can be referred as the preliminary data for studying better adsorbent physical property and adsorption capacity of odor.
with the char made by a thermal decomposition of sewage sludge, we made an absorbent to find out adsorption characteristic on H2S and CH3SH odor gas through conducting and experiment on isothermal adsorption, adsorbed temperature, gas concentration, and aspect ratio.
1. This study showed that when we examined the physical characteristic of manufactured absorbent, its iodide adsorption capacity was 652.1 mg/g and its specific surface area was 525.38 m2/g as you can see from Table 4.3. It means if the main component of an in organic substance, or SiO2 is removed, we can have good properties. The development structure of pore was high in the pore distribution around 2nm. In addition, the micropore developed around 2.36nm, or Average pore diameter. That's why we need further study on micropore to improve the capacity of an absorbent
2. As H2S and CH3SH partial pressure varied from 0.001atm to 0.02atm, H2S and CH3SH amount increased with the partial pressure. At the different temperature of 20℃, 40℃, and 60℃, we studied adsorption equilibrium. With the result we got, Langmuir's and Freundlich adsorption isotherm were used for regression analysis. We found that the maximum adsorbed amount ad reaction velocity increased with the rise of temperature. Plus, the adsorbed amount and intensity also increased. It means the absorbent was more active in chemical adsorption than in physical adsorption and so adsorption capacity rose in high temperature.
3. To study adsorption characteristic, we conducted an experiment with fixed reactor as aspect ratio(L/D) varied 0.5, 1.0 and 1.5. We got the result that adsorption capacity decreased dramatically if L/D was 0.5 ; a similar capacity was observed between L/D was 1.5 and L/D was 1.0. Therefore the optimum L/D ratio could be 1.0
4. As gas concentration varied from 200 to 600 ppm, the experiment was performed to find out the effect on the adsorption capacity. The adsorption capacity increased with gas concentration and the increase rate was lowered above 400 ppm
5. Comparing the base activated carbon, impregnated activated carbon showed 30 min, 40min, 68min of the longer H2S breakthrough time, and 0.14 mmole/g, 0.16mmole/g 0.19mmole/g of better adsorption capacity at the temperature of 20℃, 40℃, and 60℃ separately. Although CH3SH breakthrough time showed shorter breakthrough time than H2S ; 48min, 85min, and 110min of breakthrough time and 0.273 mmole/g, 0.283 mmole/g, 0.310 mmole/g of adsorption capacity, it improved better adsorption capacity by 1.8 times.
6. The manufactured absorbent was under a simultaneous adsorption with hydrogen sulfide and methylmercaptan. The result showed that the arrival times of both hydrogen sulfide and methylmercaptan were increased to 100min and 172min respectively. When it comes to adsorption amount, hydrogen sulfide rose by 1.8times ; methylmercaptan, 1.5 times. It is considered that a catalytic action appears when we remove both hydrogen sulfide and methylmercaptan. It means we got the same result from Turk's and Rago's.
7. When we compared the produced absorbent with commercial activated carbon, the breakthrough time of the absorbent was 0.8 times in hydrogen sulfide as long as activated carbon and 0.87 times in methylmercaptan. As to adsorbent amount, it was 77%(hydrogen sulfide) and 80%(methylmercaptan) of commercial activated carbon. The reason it showed highly efficient performance is that physical adsorption and chemical adsorption were conducted at the same time.
The absorbent that we used in this study was from sewage sludge dumped away by ocean abandonment. We found that it has a potential that might remove hydrogen sulfide and methylmercaptan. From the near future, the study can be referred as the preliminary data for studying better adsorbent physical property and adsorption capacity of odor.
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