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중공사막 접촉기를 이용한 암모니아 물질전달 모델링

Title
중공사막 접촉기를 이용한 암모니아 물질전달 모델링
Other Titles
Modeling of Ammonia Mass Transfe
Author
박주양
Keywords
암모니아 물질전달; 물질전달 모델링; 중공사막 접촉기; 암모니아 탈기; Mass transfer modeling; Ammonia mass transfer; Ammonia stripping; Hollow fiber membrane contactor
Issue Date
2011-08
Publisher
대한상하수도학회
Citation
대한상하수도학회지, 2011, 25(4), P.503-510
Abstract
Ammonia in water which is toxic to human, its concentration is regulated below 0.5 mg/L in drinking water. Current study aimed to develop appropriate models for ammonia stripping using hollow fiber membrane contactor. Two different models were developed during the study. Model 1 was assumed only free ammonia ($NH_3$) transfer in stripping process, whereas the Model 2 was assumed with total ammonia ($NH_3+{NH_4}^+$) transfer. Ammonium chloride ($NH_4CI$), sodium hydroxide(NaOH) were used to make ammonia solution, which was concentration of 25 mg as N/L at a pH of 10.5. The experimental conditions were such that, the liquid flow was in tube-side in upward direction and t he gas flow was on shell-side in downward direction a t room temperature. The experimental and modeling results showed that marginal difference were observed at low gas flux. However the difference between the both models and experimental value were increased when the gas flux was increased. The study concludes that the Model 1 with free ammonia is more appropriate when both models were compared and useful in ammonia stripping process at low gas flux.
URI
http://click.ndsl.kr/servlet/LinkingDetailView?cn=JAKO201119074218186&dbt=JAKO&org_code=O483&site_code=SS1483&service_code=01
ISSN
1225-7672; 2287-822x
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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