Wastewater application for onsite, low power, electrolytic hydrogen generation at room temperature and pressure = 대기압과 상온조건에서의 저에너지 전기분해 수소생산을 위한 폐수 적용에 관한 연구

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Hydrogen has gained much attention as energy carrier and also as one of the cleanest energy source .However till now it has not been able to play a significant role as an energy source. One of the reason for this is high cost of hydrogen electrolysers which if working on renewable energy sources (wind, solar) have least carbon footprint area. One of the reason is that commercial electrolysers cannot operate except either in high purity water such as SPE (Solid Polymer Electrolyte) electrolysers or high concentration of alkali, usually KOH such as alkaline water electrolysers.The usage of high purity water is also becoming an expensive option with deteriorating environmental conditions in most countries. Furthermore many of electrolysers work at high temperature and pressure to decrease voltage losses further restricting their use to selected countries where electricity prices are cheap.Though there is an exhaustive list of studies on hydrogen production from water electrolysis and electrochemical degradation of pollutants however very few studies have focused on the aspect of hydrogen production from pollutants. Therefore, this study focuses on using simulated wastewater (greywater and urine) as a water source for electrolytic hydrogen production .It explores alternative electrode materials and candidate wastewaters which can provide hydrogen at low power and cost while working at room temperature and pressure (RTP) and either mineralizing most of contaminants or turning them to environmentally benign substances which can be easily removed. Experiments were carried out in batch and semi-batch electrolytic reactors to identify possible problems and optimize conditions for wastewater electrolysis at RTP. Low power with current density varying from $25mA/cm^2$ to $150 mA/cm^2$ in batch and 1.25 to $2.5 mA/cm^2$ in semi-batch reactor was used. The reactor design was modified to decrease voltage losses and increase hydrogen yield. Some effluent parameters were a...
Advisors
Butt,T.S.researcherPark, Heekyungresearcher박희경researcher
Description
한국과학기술원 : 건설및환경공학과,
Publisher
한국과학기술원
Issue Date
2010
Identifier
418612/325007  / 020054508
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 건설및환경공학과, 2010.2, [ ix, 100 p. ]

Keywords

dimensionally stable anode; greywater; urine; wastewater electrolysis; hydrogen evolution; 수소 생산; 안정적인 양극물질; 중수도 용수; 소변; 폐수 전기분해

URI
http://hdl.handle.net/10203/30652
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=418612&flag=dissertation
Appears in Collection
CE-Theses_Ph.D.(박사논문)
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