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고효율의 대기압 유도결합 플라즈마를 적용한 고성능의 복합 플라즈마 개질 기술 개발 및 이의 응용
명성운(Sung-Woon Myung),김두일(Du-Eil Kim),박준혁(Jun-Hyuk Park),박세홍(Se-Hong Park),이윤성(Yun-Seong Lee),허진(Jin Huh),엄세훈(Sae-Hoon Uhm) 한국진공학회 2020 진공 이야기 Vol.7 No.3
We have developed a new combined plasma reforming process technology that combines a carbon dioxide plasma technology and steam and catalytic technology. The carbon dioxide plasma process technology using high-efficiency inductively coupled plasma sources was combined with H₂O and catalyst process, and their optimum process conditions for high conversion ratio, high energy efficiency were experimentally investigated. Methane conversion rate 92.99%, energy conversion efficiency 73.19%, and H₂/CO ratio 2.8 were achieved from the conditions; the source power of 27㎾, the carbon dioxide feeding rate 20 LPM, the methane feeding rate 50 LPM, the water feeding rate 60.3 cc/min. The atmospheric-pressure ICP source operating at higher frequency of 700㎑ [21] was newly developed for higher efficiency, and it was found that the new ICP source has much improved the conversion ratio and energy efficiency. The newly developed combined plasma reforming process was first applied to a practical manufacturing plant for methanol and implemented in a landfill, Daegu. This is the first practical application for methanol production from LFG (landfill gas) in Korea.
수열특성 및 기계적 안정성의 개선으로 슬러리상 CSTR에 적합한 P 첨가 알루미나 기반의 Fischer-Tropsch 합성용 코발트 촉매
정규인 ( Gyu In Jung ),하경수 ( Kyoung Su Ha ),박선주 ( Seon Ju Park ),김두일 ( Du Eil Kim ),우민희 ( Min Hee Woo ),전기원 ( Ki Won Jun ),배종욱 ( Jong Wook Bae ),강용 ( Yong Kang ) 한국화학공학회 2012 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.50 No.2
Phosphorus was incorporated into Co/Al2O3 catalyst for FTS by impregnating an acidic precursor, phosphoric acid, in γ-Al2O3 support to improve the mechanical strength, the hydrothermal stability of the catalyst particle, and the catalytic performance as well. Surface characterization techniques such as FT-IR revealed that AlPO4 phase was generated on the surface of the P-modified catalyst. The addition of phosphorus was found to alleviate the interaction between cobalt and alumina surface, and to increase reducibility of catalyst. The catalytic activity such as C5+ productivity and turnover frequency (TOF) was calculated to evaluate catalytic performance. The influence of calcination temperature of the Al2O3 containing 2 wt% P on the catalytic performance was also investigated. Through hydrothermal stability test and XRD analysis, the P-modified catalyst had strong resistant to the pressurized and hot H2O. The mechanical strength of the P-modified catalyst was also examined through an in-house fluidized-bed vessel, and it was found that the catalyst fragmentation could be successfully suppressed with P. Taken as a whole, the best performance was shown to be at 1~2 wt.% P in alumina and at the calcination temperature of 500˚C.