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제초제처리에 (除草劑處理) 의한 잣나무털녹병 중간기주 ( 송이풀류 ) 제거시험
이창근,김현중,여운홍 ( Chang Keun Yi,Hyun Joong Kim,Woon Hong Yeo ) 한국산림과학회 1981 한국산림과학회지 Vol.51 No.1
The study was conducted during 1975-1980 to evaluate the performance of several herbicides in controling alternate host, Pedicularis spp., of white pine blister rust disease in forest stands. The results obtained were summarized as follows. 1. It was found that Roundup was effective and most suitable herbicide in the fosest stands except that it accompanied some chemical injuries to neighboring plants. 2. As for the reduction density on the plot treated with Roundup was 100% and 65-91% respectively when investigated one and two years after its treatment on Pedicularis spp. 3. Another four chemicals, 2.4-D, Gramoxone, 2.4. 5-T and Para-col killed stems and leaves of Pedicularis spp. at the year treated, but appeared again next spring. 4. Eradication effectiveness in terms of spraying season was proved to be that late August was better than late May or June.
우리나라 잣나무 털녹병균의 기주선택성과 (寄主選擇性) 병원성조사
이창근,김현중 ( Chang Keun Yi,Hyun Joong Kim ) 한국산림과학회 1983 한국산림과학회지 Vol.62 No.1
Pedicularts spp. are the alternate hosts of the white pine blister rust fungi in the forests of Korea, and Ribes spp. were found as other alternate hosts by artificial inoculation test. New biotypes (races) with different host selectivity and pathogenicity of the causal fungi were speculated at various places in Korea. The aeciospores of the fungi were collected from two isolated places, Pyeongchang and Namwoen, and artificially inoculated on Pedicularis resupinata and six species of the genus Ribes. Among the tested alternate host species, P. resupinata and R. montigenum were only susceptible to both the Pyeongchang population and the Namwoen population, showing similar pathogencity between the two fungai populations. Three white pine species were planted in fungus-infested stands to study the susceptibility of each tree species. Four years later, 17.7% of Pinus koraiensis and 26.3% of the P, strobus were infected, but P. parviflora was free from attack. From the above results, it was concluded that the white pine blister rust fungus populations in Korea are of the same biotype, with .P. koraiensis and P. strobus as aecial hosts, and Pedicularis spp. and Ribes spp. as telial hosts.
분체공학 , 유동층 , 고분자 , 재료 ( 무기 , 유기 ) : 공기재생용 고온건식탈황제의 가압유동층 반응기에서의 사이클 성능실험
조성호(Sung Ho Jo),이봉희(Bong Hee Lee),류청걸(Chong Kul Ryu),진경태(Gyoung Tae Jin),이창근(Chang Keun Yi),이중범(Jeong Beom Lee) 한국화학공학회 2002 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.40 No.2
Two desulfurization-regeneration experiments for a spray-dried zinc-based sorbent(ZAC C) were performed at 500℃ and 5 atm in a fluidized-bed reactor(ID 0.097㎜) facility. The H_S concentration after each desulfurization run was maintained below 10 ppmv from a simulated coal gas of 1% H_2S. The estimated sulfur absorption capacities of ZAC C sorbent were 11.1, 10.9, 11.1, 11.1, 10.9, 10.5 g S/100g sorbent, and the sorption capacity of sorbent was maintained in spite of six times sorption experiments. The maximum SO_2 concentration in regeneration effluent gas agreed with a stoichiometric value of 500℃(ca. 14vol%). In regeneration run, the peak temperature of sorbent bed in the reactor reached up to 750 due to the vigorous exothermicity of regeneration reaction with neat air. While entrainment rate for 70h continuous run in fluidized-bed reactor is 1.07%, the size and the textural properties of ZAC C sorbent also show a little change. Multi-cycle tests in fluidized-bed show that ZAC C sorbent maintains over 50% of its theoretical sorption capacity during 70h run and regeneration reaction undergoes smoothly and completely without side reactions such as sulfate formation.
고온건식탈황 유동층 반응기 설계를 위한 zinc titanate 탈황제의 반응특성 연구
이창근(Chang Keun Yi),박재현(Jae Hyeon Park),조성호(Sung Ho Cho),진경태(Gyoung Tae Jin),손재익(Jae Ek Son) 한국화학공학회 1999 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.37 No.1
A reaction rate of a zinc titanate sorbent with H₂S for scale-up design was obtained from a simplified semi-batch fluidized reaction model and experimental data from a hot gas desulfurization fluidized bed reactor at high pressure condition. The global reaction rate from a fluidized bed reactor of 7.5 ㎝ inside diameter was 1,276 ㎤ gas/gmole H₂S/sec, which is 5 times smaller than that from TGA. The global reaction rate can be used in the design for the scale-up because the reaction rate includes the effects in fluidized bed such as bubble characteristics, mass transfer, entrainments, and solid mixing etc. Sensitivity of parameters on a fluidized reactor performance was analyzed with the simplified model.
분체공학 유동층 재료 ( 무기 , 유기 , 고분자 ) / 두 개의 Loopseal 을 갖는 KIER 고체순환 유동층공정에서의 압력균형곡선
이창근(Chang Keun Yi),배달희(Dal Hee Bae),선도원(Do Won Shun),진경태(Gyoung Tae Jin),손재익(Jae Ek Son) 한국화학공학회 1999 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.37 No.4
KIER hot gas desulfurization system consisting of a reactor of a transport mode, a regenerator of a fluidized bed mode, two loopseals, and two gas streams was tested for the stable operation of circulating solids between two reactors. Pressures in a circulation loop at various conditions were measured in a cold mode(a 0.03 m I.D. riser and a 0.075 m I.D. fluidized bed) with particles of mean diameter of 87 × 10^(-6) m and the bulk and particle density of 1,900 and 3,300 ㎏/㎥ respectively. The voidages and mixture densities of gas-solid at various sections were analyzed from differential pressures data. The continuous circulation of solids was confirmed by the single closed loop of pressure balance curves. The loopseal took a role of preventing the gas of a reactor from flowing to another reactor.
분체공학 , 유동층 , 고분자 , 재료 ( 무기 , 유기 ) : IGCC 용 유동층 고온건식탈황공정에서 Zinc - Titanate 탈황제의 100 시간 연속운전 성능실험
이창근(Chang Keun Yi),조성호(Sung Ho Jo),권학선(Hak Sun Kwon),김근범(Keun Bum Kim),채현규(Hyun Kue Chae),진경태(Gyoung Tae Jin),손재익(Jae Ek Son) 한국화학공학회 2002 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.40 No.2
Continuous operation was performed at high pressure and high temperature to see the long-term reactivity and the attrition resistance of the sorbent, the reliability of the process in a bench-scale KIER fluidized hot gas desulfurization process. A spray dried sorbent consisting of zinc-oxide and titanium oxide was used. The pressure was maintained at 5 atm, the temperatures were 600℃ in a desulfurizer and 700℃ in the the regenerator. Solids were circulated continuously and stably between two fluidized reactors at high pressure. The H_2S concentration at exit was consistently maintained for 100 hours below 40 ppmv for a simulated coal gas containing 7,700 ppm H_2S. The analysis of solid samples, such as densities, sulfur content, SEM, Mercury pore analysis, BET, size distribution, were contributed to uncover the characteristics of reactions and entrainment in two fluidized bed reactors
생물화공 , 에너지 / 환경 : Zinc Titanate 탈황제의 탈황 재생 반응 속도 해석
이창근(Chang Keun Yi),조성호(Sung Ho Cho),손재익(Jae Ek Son),문영섭(Young Sub Moon),최정후(Jeong Hoo Choi) 한국화학공학회 2001 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.39 No.2
Characteristics of desulfurization and regeneration reactions of a zinc titanate sorbent used to absorb hydrogen sulfide in coal gas have been investigated by using a thermo-gravimetric analyzer. Desulfurization was carried out with fresh sorbent and regeneration with sorbent sulfurized as much as 53%. Temperature ranged from 600 ℃ to 750 ℃ and from 650 ℃ to 750 ℃ for desulfurization and regeneration, respectively. Oxygen concentration ranged from 3 vol% to 21 vol% for regeneration. Activation energies of desulfurization and regeneration were found as 13.36 ㎉/gmol and 37.94 ㎉/gmol, respectively. The order of regeneration reaction with respect to oxygen concentration was found as 0.662. The rate of desulfurization decreased as the conversion of sorbent increased. The desulfurization ability of sorbent was depleted at a conversion about 0.789. The rate of regeneration decreased after an initial increase as conversion increased. The maximum regeneration rate occurred at a conversion about 0.5. Rate equations of desulfurization and regeneration were suggested.