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흡착성 유전체의 방전 플라즈마에 의한 톨루엔 분해에 관한 연구
최연석,김부웅,송영훈,김석준 한국화학공학회 2000 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.38 No.3
저농도의 유해가스 처리목적으로 많이 연구되고 있는 저온플라즈마 기술을 이용하여 대기를 오염시키는 VOC의 일종인 톨루엔을 분해하는 연구를 수행하였다. 사용한 플라즈마는 일반적인 교류를 전원으로 사용하는 유전체 방전 플라즈마이며, 관형의 유전체 반응기에 흡착성이 좋은 다공성의 γ-Al₂O₃를 충진해서 사용하였다. 충진한 유전체의 흡착성이 톨루엔의 분해효율에 미치는 영향을 조사하기 위해서 흡착성이 없는 glass bead를 γ-Al₂O₃와 비교하여 실험하였다. 반응기의 인가전압은 19㎸, 16㎸로 하였고 반응기 온도는 25℃, 60℃, 100℃로 바꾸면서 실험하였으며 반응속도 및 활성화 에너지를 고찰하였다. γ-Al₂O₃가 glass bead보다 높은 분해능을 나타내었고, 온도가 높을수록 분해율이 높게 나타났다. 아울러 실험견과를 유전율 측면에서도 살펴 보았으며 유전율이 높을수록 좋은 톨루엔 분해성능을 나타내었다. Non-thermal plasma technologies were known to be effective for decomposition of dilute pollutant gases. In the present study the dielectric discharge plasma was examined in order to decompose toluene vapor, a kind of air pollutant VOCs. The dielectric barrier discharge plasma using the conventional AC as an electric power source was generated inside the tubular reactor in which the porous γ-Al₂O₃beads were packed. In order to investigate the adsorptive effect of the packed dielectrics the non-porous glass bead was also examined and compared with the γ-Al₂O₃for the abatement of toluene vapor. Experiments were carried out at the electric voltage of 16 ㎸ and 19 ㎸ and at the temperature of 25℃, 60℃ and 100℃ respectively. The kinetic velocity and activation energy of toluene decomposition reaction was studied in the γ-Al₂O₃beads packed reactor. The γ-Al₂O₃bead showed better performance for toluene decomposition than the glass bead. As the reactor temperature rising, the toluene decomposition rate also increased. Additionally the effect of dielectric constant of the packed dielectric was studied. The dielectric of higher dielectric constant showed better performance than that of lower one.
원주시 생활폐기물고형연료(RDF) 제조 시설의 에너지생산효과 및 경제성 평가
최연석,정두수,이상훈 한국폐기물자원순환학회 2012 한국폐기물자원순환학회지 Vol.29 No.4
The waste treatment cost and energy production benefit of Wonju city RDF plant, the first RDF manufacturing plant in Korea, were investigated in this study. All plant operation data, like total weight of received wastes, produced RDF and separated rejects in processes have been fully recorded for mass balance calculation of the plant. Also all consumed oil and electricity have been recorded for energy balance calculation. The results showed that the waste treatment cost not included the RDF sales price of 25,000 won/ton-RDF was 139,316 won/ton-MSW and it went down to 128,640 won when included the RDF price in 2011. Produced RDF was 42.7% of total received waste in weight. Three components analysis by mass balance calculation of total received waste showed that Wonju city's MSW was 34.0% of combustible, 35.0% of water and 31% of incombustible respectively. Energy effect was found that total amount of produced energy was about 4 times more than that of consumed energy. Analysis data for 5 years since 2007 were summarized and shown in this study.