• Proceedings of the Korea Air Pollution Research Association Conference
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• 1999.10a
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• pp.244-245
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• 1999

고온 집진을 위한 세라믹 필터의 개발은 1980년대 이후 유럽을 중심으로 활발한 연구가 수행되고 있으며 기존 대기오염 방지 시설로는 처리가 불가능한 고온 공정에 상용화 되어 있고 국내에도 비철금속, 탄화공정, 유리 용해로 등의 공정에 세라믹 필터을 이용한 고온 집진 공정이 설치되어있다. 본 연구에서는 국내에서 개발한 저밀도 세라믹 필터를 이용해 300~$600^{\circ}C$의 고온에서 장시간 실험을 수행 하였으며 장기 집진시 차압과 효율 그리고 세라믹 필터의 특성 변화를 관찰하였다.(중략)

• Proceedings of the Korean Fiber Society Conference
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• 1998.10a
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• pp.485-488
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• 1998

활성탄소는 안정화, 탄화 및 활성화 공정을 거쳐 제조되는 표면적인 큰, 미세다공성의 탄소로서 탈색, 탈취 및 탈균 등 다목적으로 사용되고 있는 대표적인 흡착제이다[1,2]. 단순히 흡착력만의 관점에서 본다면 탄화물에 미세공의 도입이 최대화가 되는 조건을 활성탄소 제조의 최적조건이라고 볼 수 있다. (중략)

• Applied Chemistry for Engineering
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• v.17 no.5
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• pp.539-546
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• 2006

A study on the polymerization of polyethylenedioxythiophene (PEDOT) and the carbonization process of a separator was carred out in order to apply conductive polymer PEDOT to the winding typed aluminum condenser as a solid electrolyte and a negative electrode. PEDOT was polymerized with ethylenedioxythiophene (EDOT) as a monomer and ferric-p-toluenesulfonate as an oxidizing agent. The separator of condenser element was carbonized to control its fibrous tissue for the purpose of making it easy to impregnate the PEDOT solution into the microporous etched pit of aluminum foil by preventing separator from concentrating the PEDOT solution on itself. The characteristics of condenser such as capacitance, dissipation factor, equivalent series resistance, and thermal resistance depended on a carbonization temperature and a carbonization time. It was found that a thickness and a density of the used separator were major parameters of carbonization process and the characteristics of condenser were affected by these parameters.

• Proceedings of the Korean Nuclear Society Conference
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• 1997.05b
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• pp.11-16
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• 1997

원자로 압력용기강의 제조열처리인 ？칭과 템퍼링 중간에 페라이트와 오스테나이트가 공존하는 영역에서 2상영역열처리를 추가한 후 템퍼링조건을 조정함으로써 파괴인성을 향상시키는 열처리 공정을 개발하였다. 새 열처리공정을 적용하면 기존공정에 비하여 강도는 크게 감소하지 않으면서 충격인성과 연성이 크게 증가하고, 천이온도가 약 2$0^{\circ}C$ 감소하였다. 2상영역열처리를 하면 연한 템퍼드 베이나이트 기지에 비교적 강한 템퍼드 마르텐사이트가 균일하게 분산된 복합조직을 얻을 수 있고, 유효 결정립의 크기가 감소하여 균열진전이 억제되었다. 또한 기존공정의 판상 탄화물 대신 구형 탄화물이 형성되기 때문에 응력집중이 완화되어 파괴저항성이 향상되었다. 그리고 2상 영역열처리후 템퍼링 정도를 낮추면 탄화물 크기가 작아지기 때문에 균열발생이 억제되어 저온 충격인성이 향상되었다.

• Proceedings of the Korean Ceranic Society Conference
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• 2003.10a
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• pp.177.1-177
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• 2003

• Journal of Energy Engineering
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• v.12 no.2
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• pp.145-153
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• 2003

In order to develop the carbonation process as a core technology of zero emission coal power plant, study on characterization of methane steam reforming (MSR) which is main reaction of this process was carried out. The effects of gas hourly space velocity (GHSV), steam/carbon (S/C) ratio and pressure in the MSR using reforming catalyst were investigated. The equilibrium composition of the gases produced in the MSR were obtained below GHSV 7,000 hr$\^$-1/. The operating conditions of carbonation process using hybrid reaction (MSR+CO$_2$ adsorption using CaO) were 700∼800$^{\circ}C$ and S/C ratio of 2.5∼3. The equilibrium mixture of gases composed of 75∼78% H$_2$ and 8∼9％ CO$_2$ at atmospheric pressure and 60∼78% H$_2$ and 9∼l1% CO$_2$ at 1∼30 atm respectively under above operating conditions.

• Clean Technology
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• v.19 no.3
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• pp.279-286
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• 2013

Using a cation exchange resin of polystyrene-DVB copolymer as a carbon source for the production of activated carbon, the effects of operating parameters on the physical properties of activated carbon such as specific surface area and specific pore volume were experimentally studied. In carbonization process specific surface area and specific pore volume of carbonized product decreased with the increase of carbonization temperature and time. They were proportional to activation temperature and time up to the specific temperature and time in activation process. In carbonization process the increase of heating rate gave negative effect to the properties. The properties of activated product, on the contrary, increased with the heating rate in carbonization process. The properties of activated carbon manufactured with the resin exchanged with divalent cations were lower than those with raw resin.

• Applied Chemistry for Engineering
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• v.34 no.5
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• pp.488-492
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• 2023

In this study, a carbon film derived from a polymer/lignin composite precursor was produced by a carbonization cycle with a controlled temperature profile. The feasibility of successful formation of the carbon film using the carbonization cycle was monitored. The adsorption behavior of the carbon film toward various molecules, such as nonpolar and polar organic molecules, and dyes was investigated using ultraviolet/visible (UV/Vis) spectroscopy compared with that of carbonized lignin. Cyclic voltammetry (CV) analysis proved that a robust carbon film was prepared by the carbonization cycle. It was also demonstrated that the carbonized lignin and carbon film showed adsorption capability toward all types of organic molecules, in particular organic dyes, owing to the carbonized lignin. This work provides important information for future relevant research.

• Composites Research
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• v.18 no.5
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• pp.27-33
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• 2005

In this research, the mathematical modelling of the pulse-CVI (Chemical Vapor Infiltration) for the preparation of siliconcarbide/carbon composite. Each pulse consists with the gas injection time, the reaction time and the evacuation time. Effects of the reaction time and the evacuation time were studied. Additionally, the effects of the reactant concentration and the pressure were observed. The benefits of the pulse-CVI such as the uniform infiltration of siliconcarbide into the carbon preform and the short reaction time were certified.

• Proceedings of the Materials Research Society of Korea Conference
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• 2003.03a
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• pp.205-205
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• 2003

우리나라에서는 많은 양의 폐분진이 발생하며 경남지역에서는 연간 3만톤의 폐분진이 발생한다. 매년 폐기물의 발생량은 증가하고 있으며 폐분진류의 주성분은 실리카와 알루미나가 주성분을 이룬다. 특히 주조, 제강 등 금속공업에서 발생하는 분진은 입자가 미세한 다량의 실리카와 알루미나로 이루어져 있어 탄화규소(SiC) 및 알루미나-탄화규소-탄소(A1$_2$O$_3$-SiC-C)계 내화물 제조에 분쇄공정 없이 세라믹스의 원료로 활용할 수 있다. 현재 알루미나-탄화규소-탄소(Al$_2$O$_3$-SiC-C)계 내화물 제조를 위해 제조공정이 간단한 연소합성법을 이용하지만 분말제조 공정 중 분위기 조절에 많은 비용이 요구되고 있어 시급한 대안이 필요한 상태이다.