Optimal process design for forward osmosis desalination on the basis of draw solute searching method = 유도용질 탐색기법을 기반으로 한 정삼투식 해수담수화공정의 최적설계

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Optimal draw solute for forward osmosis desalination is found, and the desalination process is designed using the draw solute. At first, a systematic approach is proposed to find proper compounds for draw solute. The proposed approach has following three steps. 1)Property database is established. The database contains osmotic pressure, boiling point, solubility and toxicity information for a total of 4,058 compounds. Osmotic pressures are gathered from OLI stream analyzerTM and boiling point and solubility are calculated by elecNRTL and NRTL models. Toxicity information is gathered from literature. 2)Screening method is applied. Screening criteria include osmotic pressure, solubility, boiling point, and toxicity. Finally seven candidates are selected by the method. 3)Water production cost for each candidate is compared. Operation and capital cost model for the FO membrane process and draw solute recovery process are established, and the cost minimization problem is solved for various conditions. After the systematic approach is applied, separation processes for ammonium bicarbonate, ammonium hydroxide, and ethanol are designed using Aspen Custom Modeler®. Design factors for the distillation column, heat exchanger, and absorber are determined, and flow configuration is optimized. CO2:NH3 ratio is added as a design factor since enrichment of ammonium helps to dissolve carbon dioxide. An optimal separation process is designed which achieves complete redissolving of decomposed gas and minimum water production cost.
Advisors
Park, Sun-Wonresearcher박선원
Description
한국과학기술원 : 생명화학공학과,
Publisher
한국과학기술원
Issue Date
2013
Identifier
567256/325007  / 020105059
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 생명화학공학과, 2013.2, [ vi, 92 p. ]

Keywords

Forward osmo; 물성 데이터베이스; 공정설계; 유도용액/유도용질; 담수화; 정삼투; Desalination; Draw solute/solution; Process design; Property database; Systematic approach

URI
http://hdl.handle.net/10203/196372
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=567256&flag=dissertation
Appears in Collection
CBE-Theses_Ph.D.(박사논문)
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