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충전형 저온 플라즈마 반응기에서 시안 화합물의 분해 특성
류삼곤 ( Sam Gon Ryu ),박명규 ( Myung Kyu Park ),이해완 ( Hae Wan Lee ) 한국화학공학회 2012 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.50 No.2
The decomposition behaviors of gaseous cyanides in non-thermal plasma-catalyst hybrid reactor have been investigated with the variation of discharge power, influent concentration of cyanide, humidity of air carrier and packed materials in the reactor. Destruction of cyanides by plasma only process was very difficult compared to that of trichloroethylene. But the destruction efficiencies of cyanides were dramatically improved through packing alumina or Pt/alumina bead in the plasma discharge region. From the results, it could be assumed that thermal catalytic effect is involved simultaneously with plasma in the reaction of cyanides destruction on the alumina or Pt/alumina packed plasma reactor.
천궁체계 교전/사격통제소용 종합식보호장치의 화생방호성능 평가 연구
심우섭,류삼곤,권태근,Shim, Woo-Sup,Ryu, Sam-Gon,Kwon, Tae-Geun 한국군사과학기술학회 2012 한국군사과학기술학회지 Vol.15 No.1
The integrated protection unit of CHEONGUNG is composed of chemical-biological equipment and air conditioner equiped heating element. The protection capabilities against chemical-biological agent were measured by using simulant agents such as n-Hexane, KM5 Screening Smokes and CS agent. The experimental test results with simulant agents verify the protective performance of the integrated protection unit.
손종락,류삼곤 ( Jong Rack Sohn,Sam Gon Ryu ) 한국공업화학회 1992 공업화학 Vol.3 No.4
분말의 Zr(OH)_4를 (NH_4)2_CrO_4수용액에 함침시킨 후 공기중에 소성하여 질코니아에 담지된 산화크롬 촉매를 제조하였다. 제조된 CrO_x/ZrO_2 촉매상에 cumene을 반응시켜 산화-환원 거동을 연구한 결과 크롬의 산화상태가 +6인 chromate형태로 질코니아 표면에 존재할 때는 강한 산점이 생성되어 cumene의 탈알킬화 반응에 촉매활성을 나타내었다. 그러나 많은 양의 Cr^(6+)종은 반응중에 탈수소로 생성된 H_2에 의하여 환원되어 Cr^(3+)종으로 변화되었으며 Cr^(3+)종은 cumene을 탈수소화시켜 α-methyl styrene을 생성하는 반응에 활성점으로 작용하였다. 환원된 Cr^(3+)종은 0_2로 처리하면 다시 Cr^(6+)종으로 되고 따라서 산화된 촉매는 cumene의 탈알킬화 반응에 활성을 나타내었다. Chromium oxide/zirconia catalysts were prepared by dry impregnation of Zr(OH)_4 powder with aqueous solution of (NH_4)_2CrO_4 followed by calcining in air. The redox behavior of prepared catalysts were investigated by reacting cumene as test material over catalysts. As a result it was found that Cr^(6+) species(as chromate) on the surface of catalyst was responsible for the formation of strong acid site and the catalytic activity for the dealkylation of cumene. However, much of the Cr^(6+) species was reduced to Cr^(3+) species by H_2 formed during the catalytic reaction of cumene and the reduced Cr^(3+) species was an active site for dehydrogenation of cumene to form α-methyl styrene. The reduced Cr^(3+) species was also reoxidized to a Cr^(6+) species after treatment with O_2 and consequently the reoxidized catalyst exhibited catalytic activity for the dealkylation reaction of cumene.
초임계 이산화탄소에 의한 금속 담지 활성탄으로부터 담지금속의 추출
이종철,류삼곤,Lee, Jong-Chol,Ryu, Sam-Gon 한국군사과학기술학회 2008 한국군사과학기술학회지 Vol.11 No.5
Metal ions such as Cu and Cr were extracted from the Cu, Cr and Ag impregnated active carbon by contacting the solid surfaces with supercritical carbon dioxide(Sc-$CO_2$) containing chelating agents. About 10g of the active carbon sample were loaded in a vertical tube extractor contacting with $CO_2$ flowing from the bottom of the tube for 6hrs. The ligands used were acetyl acetone(AA) and Cyanex-302(C-302). Water and methanol were used as entrainers to study the effect of co-solvent to $CO_2$. Experimental results showed that C-302 was more effective than AA in removing Cu with the maximum extraction of 42.0wt%, while 57.6wt% of Cr was extracted with AA from the sample.
과산화수소 증기 시스템을 이용한 미생물 제독에 관한 연구
김윤기,김민철,윤성녀,황현철,류삼곤,Kim, Yun Ki,Kim, Min Cheol,Yoon, Sung Nyo,Hwang, Hyun Chul,Ryu, Sam Gon 한국환경보건학회 2013 한국환경보건학회지 Vol.39 No.3
Objectives: Effectiveness and conditions of vapor-phase hydrogen peroxide (VPHP) system on decontamination of Geobacillus stearothermophilus(GS) spores, Escherichia coli (E.coli) and Enterobacteria phage felix01 (felix01) were determined. Methods: The VPHP system was designed to vaporize 35% (w/w) solution of hydrogen peroxide, continuously to inject and withdraw VPHP. The system and VHP 1000ED (Steris) were operated such that dehumidification and conditioning were initiated without samples in the chamber. Then the samples were loaded into and removed. Coupons (glass, anodizing, silicon, viton) with GS spores ($1{\times}10^6$ colony forming unit/mL [CFU/mL]), E.coli ($1{\times}10^7$ CFU/mL) and felix01 ($1{\times}10^7$ plaque forming unit/mL[PFU/mL]), and Biological Indicator (BI) with GS spores ($1{\times}10^6$ CFU/mL) on stainless steel coupons were used. The tested samples were sonicated and vortexed, and then were plated for enumeration, followed by incubation at $55^{\circ}C$, 24 hr for GS spores, and at $37^{\circ}C$, 24 hr for E.coli and felix01. BI analysis in broth culture was only qualitative. Results: The efficacy of the VPHP system on decontamination was almost equivalent to that of VHP 1000ED. The conditions for complete decontamination with the VPHP system was as follows: concentration; 700~450 ppm, relative humidity; approximately 55%, and temperature; $34{\sim}32^{\circ}C$. When comparing the decontamination efficiency among different kinds of coupons, glass was the most effective, however, all kinds of coupons were decontaminated completely after 60 min exposure in both systems. Conclusion: The VPHP system can be recommended as an alternative system for traditional system using ethylene oxide, formaldehyde or chlorine dioxide.