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유만형 서울시립대학교 산업기술연구소 1998 산업기술연구소논문집 Vol.6 No.2
This research was carried out to study on adsorptivities of the active carbon manufacturing from orange shell. The adsorptivities of the active carbon produced was investigated by iodine, methylene blue and molasses. The results are as follows; 1.The rate of digestion is increased with the addition of the activating agent and the activating aid. 2.The adsorptivities of the active carbon show maximum when the time of activation is 150 minutes. 3.The adsorptivities of the active carbon show maximum when it is treated at 700℃ of activation temperature, and no increase of adsorptivities is observed in higher temperature because of theover-activation. 4.The activation is best when ZnCl2 and 30% HCI aqueous solution are added 200 and 30 wt · % of the orange shell respectively.
柳萬馨 서울市立大學校 1984 論文集 Vol.18 No.-
This study is concerned on the conversion of methane with air into CO and H₂under free-catalyst and Ni-catalyst. The results are as follows: 1. When the mole ratio of oxygen to methane is 1.2 at 950℃ of reaction temperature under free-catalyst, the reaction efficiency of CO and H₂ for 1 mole of methane has the maximum value of 0.53 and 0.71 respectively. 2. The optimum reaction temperature is 950℃ under free-catalyst. 3. The optimum reaction temperature is 800℃ under Ni-catalyst and the reaction efficiency of CO and H₂for 1 mole of methane is 0.72 and 1.23 respectively. 4. The reaction temperature can be lowed by using Ni-catalyst and the reaction efficiency of CO and H₂can be increased to 3.58% and 71.8% respectively as compared with free-catalyst.
柳萬馨 서울市立大學校 1986 論文集 Vol.20 No.1
In this study on the gasification of rice husk by the internal recycle of pyrolysis gas, the following results have been proved; 1. The gasification by the separated combustion and the internal recycle of the pyrolysis gas can be used for scaling up the gasification in co-current fluidized bed. 2. The internal recycle of pyrolysis gas can make the tar content of producer gas decrease greatly, and the gasification efficiency is the affected by the internal recycle. 3. In the gasification by the internal recycle of pyrolysis gas, lower heating value of producer gas is 4.500 KJ/Nm³, and the tar content in this producer gas decreases below 0.1 g/Nm³.
유만형 서울시립대학교 도시과학연구원 2000 도시과학논총 Vol.26 No.1
This research was carried out to study the adsorptivities of active carbon manufactured from waste animal bone. The adsorptivities of the active carbon produced was investigated by iodine, methylene blue and molasses tests. the results are as follows: 1.The adsorptivities of the active carbon are increased with the addition of activating agent and activating aid ub digestion process. 2.The adsorptivities of the active carbon show a maximum at the activation time of 120 minutes. 3.The adsorptivities of the active carbon show a maximum at the activation temperature of 800℃, and no increase of adsorptivities is observed at higher temperatures because of over-activation. 4.The activation is most effective when 2nCl_2 and 30% HCl aqueous solution are added by 100 and 20% of the waste animal bone, respectively.
Charcoal 촉매하에서 Rice Husk의 가스화에 관한 연구
柳萬馨 서울시립대학교 산업기술연구소 1997 산업기술연구소논문집 Vol.5 No.-
During the gasification of the rice husk in the presence of charcoal as a catalyst the tar has been significantly lowered in the decomposed gas products. Therefore this cracking method can be applied to the gasification of rice husk and the following results have been obtained. 1.At the temperature of 800℃, it has shown that the catalytic cracking has been opuniged. 2.The gasification has best proceeded with the catalyst amount of 0.2g per unit gram of rice husk, above which it has no effectiveness. The main gas products are identified as H2 and CO3. 3.The amount of tar accompanied by the Product gases has been reduced by 85% in comparision with the free charcoal catalyst base,
바이오매스의 깨스화에 관한 연구(Ⅰ) Rice Husk의 물성조사와 깨스화
柳萬馨 서울市立大學校 1987 論文集 Vol.21 No.2
1. When rice husk is heated in 110℃ for 30 minutes, allmostall free water is vaporized, and organic materials are pyrolyzed at around 200℃ and the mass of the rice husk begin to reduce. The rate of the pyrolysis rapidly increases. 2. The pyrolysis of rice husk results in 60% of the mass reduction to around 400℃. 3. When N₂is flowed into the reactor as inert material and rice husk is pyrolyzed, heating value of gases increases along with the increses along with the increase of the pyrolysis temperature. The amount of gases produced reaches 300ml/g at around 700℃ and the heating value amounts to 3,600 kcal/㎤. 4. When N₂and H₂O are flowed into the reactor, and rice husk is pyrolyzed, the amount of gases produced is 950ml/g and the heating value is about 3,000kcal/㎤.
柳萬馨,金榮泰,車岷煥 울산대학교 1976 연구논문집 Vol.7 No.1
본 연구는 분무건조기의 설계에 있어서 Atomizer의 조작조건에 따른 여러인자를 연구하였다. Slurry 상으로된 용액을 건조열공기과 접촉시켜서 짧은 시간에 입자로서 건조시키는 것이었다. 건조속도 및 온도분포, 분무기의 분사속도 등을 한정입자로 하여 실험하였다. This study was carried out to correlate the very important factors and derive an equation for design of spray drying chamber in general form including operating conditions of atomizer. Taking the largest frop among spray particles as a limiting particle correlate the trajectory equation, drying time of the particle and the parameters which determine the volume of a drying chamber. Temperature difference between the dry bulb and wet bulb at various local points was measured and compared with over-all temperature difference between inlet and outlet of the chamber.