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폴리설폰 중공사막을 이용한 연소 배기가스 중 이산화탄소 분리에 관한 연구
김성천(Seong Cheon Kim),전정현(Jeong Hyeon Chun),전영남(Young Nam Chun) 大韓環境工學會 2014 대한환경공학회지 Vol.36 No.2
본 연구에서는 폴리설폰 중공사막을 이용하여 화석연료 연소에서 배출되는 온실가스 중 CO₂의 회수에 관한 연구를 실시하였다. 고농도의 CO₂를 회수하기 위한 막분리 공정에 대한 선행연구이다. 혼합가스 분리거동 관찰을 위하여 이산화탄소가 10% 함유된 배기가스를 사용하였다. 압력, 온도, 주입가스 조성, 다단 막 변화를 주어 스테이지 컷에 따른 분리 성능을 조사하였다. 압력과 온도가 증가 할수록 투과측에 CO₂ 농도와 회수율이 증가하였다. 주입 가스 조성 변화 시 CO₂의 함량이 높을 경우 회수율 및 분리 효율이 높아졌다. 3단 분리막 시스템을 이용시 CO₂ 농도 95% 이상, 회수율 90% 이상 보였으며 1단분리막 보다 분리율이 향상되었다. In this research, polysulfone hollow fiber membrane was used to recover CO₂ which is one of greenhouse gases from flue gas stream being emitted after the combustion of fossil fuels. The prerequisite requirement is to design the membrane process producing high-purity CO₂ from flue gas. For separation of CO₂, a membrane module and flue gas containing 10% carbon dioxide was used. The effects of operating conditions such as pressure, temperature, feed gas composition and multi-stage membrane on separation performance were examined at various stage cuts. Higher operating pressure and temperature increased carbon dioxide concentration and recovery ratio in permeate. Recovery ratio and separation efficiency increased if a higher content of CO₂ injection gas composition. Three-stage membrane system was producing a 95% CO₂ with 90% recovery from flue gas. The separation efficiency of three-stage membrane system was higher than one-stage system.
김성천 ( Seong Cheon Kim ),김승호 ( Seong Ho Kim ),전영남 ( Young Nam Chun ) 조선대학교 공학기술연구원 2010 공학기술논문지 Vol.3 No.1
The present work explores an alternative method to the one generally employed for the pyrolysis of sewage sludge. This method consists the pyrolysis of a dried sewage sludge as it was produced in the sewage sludge dryer i.e. with a typical moisture content of between 0 and 10 wt%. A bench-scale pyrolysis process was carried out for the treatment of a sewage sludge. The aim of this study was to understand the characteristic of pyrolysis sludge. The pyrolysis of a sewage sludge, produced by a Gwangju urban wastewater treatment plant, was carried out in a laboratory furnace. Pyrolysis conditions (heating rate) was tested so that their influence on the characteristics of the resulting gases, liquids and solid residues could be studied. The result of the experimental pyrolysis conditions, showed different yield as the heating rate changes. Solid, liquid and gas yield were 42%, 28% and 32% at 60 ℃/min heating rate.
하수 슬러지의 건조를 위한 로터리킬른 건조로 최적 운전 조건에 관한 실험적 연구
김성천 ( Seong Chun Kim ),전영남 ( Young Nam Chun ) 조선대학교 공학기술연구원 2009 공학기술논문지 Vol.2 No.2
Sludge disposal technology has been studied with many researchers since disposal of sewage sludge has been a social problem. The current technologies include incineration, carbonization, pyrolysis, landfilling and fertilization. However, all of these processes require a dry process, because sewage sludge with more than 80% high water content is difficult to be used as a raw material. This study has the purpose to establish the optimal operation conditions and the technology as changing the variables: kiln residence time, sludge load, dryer temperature, by using the previous study that is rotary kiln type dryer designed as a nwnerical simulation study. As the results, optimum conditions are determined as follows: kiln residence time, sludge load, dryer temperature are 55 kg/mhr, 17 min, 255°C, respectively. Content of water, drying efficiency show that the results are 120/0, 86% and the dried sludge is released by a dryer below 10 mm.
글라이딩 아크 플라즈마 개질기를 이용한 모사 타르 저감
김성천(Seong Cheon Kim),임문섭(Mun Sup Lim),전영남(Young Nam Chun) 한국열환경공학회 2010 한국열환경공학회 학술대회지 Vol.2010 No.춘계
Thermal decomposition/gasification technology utilizes an energy conversion technique from various waste resources, such as biomass, solid waste, sewage sludge, etc for generating syngas. However, in thermal decomposition of gases during the process tar might cause the damage and create operating problem to the facility. In this study, a gliding arc plasma reformer was developed to solve the previously acknowledged issues. In addition, the experiments on the variables that can affect the removal efficiency were conducted to provide the optimal operating conditions. The optimal operating conditions are 2 of Steam/Carbon ratio for steam input amount, 0.98 kWhm-3 of SEI for specific energy input, 14 L/min of a total gas amount, 3.6% of initial benzene concentration, 300℃ of input temperature, 1.5 mm of nozzle diameter, 3 mm of electrode gap distance and 95 mm of electrode length. In this case, the maximum benzene decomposition efficiency and energy efficiency are about 95% and up to 120 g/kWh, respectively.