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홍민선,문수호,이재춘,이동섭 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.3
The CuO/3Al₂O₃ㆍ2Si0₂ catalyst impregnated ceramic candle filters for nitrogen oxides removal were prepared by porous mullite(3Al₂O₃ㆍ2Si0₂) support and CuO catalyst deposited on this support to achieve uniformly dispersed CuO deposition, which arc impregnated into the pores of available alumino-silicate ceramic candle filter. The CuO/3Al₂O₃ㆍ2Si0₂ catalyst impregnated ceramic candle filters were characterized by XRD, BET, air permeability, pore size, SEM and catalytic tests in the reduction of NOx by NH₃. The observed effects of CuO/3Al₂O₃ㆍ2Si0₂ impregnated ceramic candle tilters in SCR reaction arc as follows: (1) when the content of CuO catalyst increased further, activity of NO increased. (2) NO conversion at first increased with temperature and then decreased at high temperatures (above 400℃), possibly due to the occurrence of the ammonia oxidation reaction. (3) In pilot plant test for 3 months, NO conversion was greater than 90%.
홍민선,이동섭,이재춘,나진균 한국에너지학회 1994 에너지공학 Vol.3 No.2
고온, 고압하에서 효율적으로 분진을 제거하는 고온 여과재는 IGCC의 Hot Gas Cleaning, 화학공정 등에 유용하게 사용될 수 있으며 전세계적으로 pilot 또는 semicommercial scale로 연구개발 중에 있다. 본 논문에서는 디스크형(50 $\times$10t) 섬유형 여과재를 제조하여 $600^{\circ}C$에서 제철, 유리, 제지 및 석탄화력발전소 배출분진을 이용한 성능시험을 수행하였다. 개발된 여과재의 저항계수는 1010―5$\times$1011의 범위에 존재하였고 총집진효율은 99.7%이상의 높은 효율은 나타내었다. 또한 분진의 표면여과 속도는 10cm/sec로 기존여과 집진기의 5배이상으로 유지하였고 탈진강도 2기압, 탈진시간 0.1초에서 효율적인 집진 및 탈진이 되었다.
홍민선,문수호,이재춘,이동섭,임우택 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.2
A catalyst with CuO ceramic filter for simultaneous treatment of dust and HAP was prepared and characterized. Catalytic ceramic tilter can not only potentially achieve the substantial savings in energy but provide with effective optimization and integration of process for simultaneous removal of S0₂ㆍ NOx and particulates from flue gases. Catalytic ceramic filters remove simultaneously particulates on exterior surface of filters and reduce NO to N₂and H₂O by SCR (Selective Catalytic Reduction) process. Preparation of catalyst impregnated ceramic filter with disk shape (Ψ50) follow the processing of alumino-silicate ceramic filter, support impregnation and catalyst impregnation(copper oxide). Preparation routes of alumino-silicate catalyst carrier suitable for production of catalytic filters practically were studied and developed using the sol-gel and colloidal processing, homogeneous precipitation and impregnation method. Characterization of the catalyst, catalyst carrier catalytic filter materials have been performed the using various techniques such as BET, XRD, TGA, SEM. Combination of the sol-gel and colloidal processing and impregnation method is recommended to prepare catalyst carriers economically for catalytic filter applications.
질소산화물 제거를 위한 디스크형 바나디아 촉매담지 세라믹필터의 특성
홍민선,문수호,이재춘,이동섭 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.4
The performance of disk-type catalytic fillers impregnated by TiO₂ or TiO₂-3Al₂O₃ㆍ2SiO₂ supports and V₂O_(5), catalyst was evaluated for selective catalytic reduction (SCR) of NO with ammonia as a reductant. XRD, FT-IR, BET and SEM were used to characterize the catalytic filters prepared in this work. Optimal V₂O_(5) loading and reaction temperature for V₂O_(5)/TiO₂ catalytic filters were 3~6wt.% and 350~400℃ at GHSV 14.300hr-¹ in the presence of oxygen, respectively. With increasing the V₂O_(5) loading from 0.5 to 6 wt.%, NO conversion increased from 24 to 96% at 400℃ and 14.300 hr-¹, and maintained at 80% over in the V₂O_(5) loading range of 3~6 wt.% and then dropped at V₂O_(5) loading of 7wt.% over. In comparing V₂O_(5)/TiO₂ and V₂O_(5)/TiO₂-3Al₂O₃ㆍ2SiO₂ catalytic fillers, which have same 3 wt.% V₂O_(5) loading, the V₂O_(5)/TiO₂-3Al₂O₃ㆍ2SiO₂ catalytic filter showed higher activity than V₂O_(5)/TiO₂ catalytic filter, but higher differential pressure drops owing to its low air permeability.
홍민선,김선옥 한국화학공학회 1992 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.30 No.3
토양 및 고체폐기물 중의 유해물질을 제거하는 공정 중에서 초임계유체 분리공정을 이용하여 토양에 오염된 o-dinitrobenzene의 추출을 시도하였다. 순수 CO₂와 acetone, methanol과 같은 entrainer를 5 wt% 포함한 혼합유체를 사용하여 entrainer의 종류, 유량 및 온도에 따른 추출효율을 검토하였다. 본 연구에서 이용한 추출에 대한 수학적 model로 토양 중의 잔류농도를 계산한 결과 실험치와 일치되는 좋은 결과를 얻을 수 있었다. Among various processes to remove hazardous chemicals in soil or solid waste materials the supercritical fluid separation process has been selected to extract o-dinitrobenzene contaminated in soil. The effects of entrainers, flow rate and temperature on separation efficiency have been investigated using pure CO₂ and mixtures containing 5 wt% of acetone or methanol as entrainers. A mathematical model has been proposed to calculate the residual concentration of o-dinitrobenzene in soil, which agrees well with the experimental data.