• Korean Chemical Engineering Research
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• v.52 no.5
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• pp.688-693
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• 2014

For investigating NO reduction activity of an catalytic filter, the catalytic performance was measured under the presence of $SO_2$ and $H_2O$, respectively or simultaneously in the simulation gas composed of NO, $NH_3$, and air. The catalytic filter was prepared by coating $V_2O_5-WO_3/TiO_2$ catalyst on the pore surface of SiC filter element of which the superior performance for the particulate removal was well known. At the temperature below $260^{\circ}C$, the catalytic activities were enormously decreased under the presence of $SO_2$ and $H_2O$, respectively or simultaneously, compared with those under the cases of the absence of $SO_2$ and $H_2O$. However, the presence of $SO_2$ promoted the performance of the catalytic filter above $320^{\circ}C$ with showing the NO conversion better than 99.8% for the NO inlet concentration of 500 ppm and at the face velocity of 2 cm/s. In particular, the presence of water showed high NO conversion higher than 99% up to high temperature of $380^{\circ}C$. This effect of water was explained by the reason that it retarded the ammonia oxidation which is the main step into the formation of $N_2O$. The initial NO reduction activity of the catalytic filter maintained for the duration of 100 hours in the presence of $SO_2$ and $H_2O$. Therefore, it was concluded that the catalytic filter was promisingly useful for the industrial NOx reduction catalyst in order to treat the particulate and NO simultaneously.

• Proceedings of the Microbiological Society of Korea Conference
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• 2005.05a
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• pp.187.3-187
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• 2005

• Proceedings of the Microbiological Society of Korea Conference
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• 2005.05a
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• pp.184.3-184
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• 2005

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2017.10a
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• pp.207-207
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• 2017

• Proceedings of the KIEE Conference
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• 1993.11a
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• pp.181-184
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• 1993

Microwave characteristics of the system (Zr, Sn)$TiO_4$, ceramics within composition range X between 0.2 and 0.35 were investigated at 8GHz. For the improvement properties of (Zr, Sn)$TiO_4$, system, $Ta_2O_5$ and $WO_3$ addition in the range of 0.5 to 2.0wt% were investigated.

• Proceedings of the Acoustical Society of Korea Conference
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• 1998.08a
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• pp.188-191
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• 1998

호주 영어의 단어 중 한국인과 일본인이 구별하기 어려운 'work', 'walk', 'wok' 세 단어에 대해 다룬다. 우선 한국인과 일본인이 이들 세 단어를 어떻게 조음할 것인가를 예측하고, 실제로 한국인과 일본인 화자들이 조음한 자료를 가지고 모듬의 음질과 길이 두가지 측면으로 나누어 예측한 사항과 비교하고 또 이들 단어를 조음할 때 한국인과 일본인 사이에 어떤 음성 음운적 특징이 나타나는지도 비교 분석한다. 결과는 모국어의 음성, 음운적 영향이 목표어의 음소를 습득하고 발음하는데에 영향을 미친다는 사실을 보여주고 있다. 하지만 wok/wo k/의 예는 언어 보편적인 요소가 L2의 음소를 습득하는데 있어 또 하나의 요소로 작용하고 있음도 알려주고 있다.

• Proceedings of the KIEE Conference
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• 2006.10a
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• pp.127-128
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• 2006

고출력 마그네트른 발진기는 마이크로파 발생원으로서 식품, 고무, 섬유, 목재, 세라믹, 폐기물 등의 다양한 산엄적 프로세스에 응용된다. 여러 가지 새로운 마이크로파 응응분야들이 보고되고 있을 뿐만 아니라 계속 연구되고 있다. 본 연구에서는 3차원 전자기장 해석용 시뮬레이션 코드를 이용하여 이중 스트랩형 고출력 마그네트론을 모델링하였다. 본 논문에서는 마그네트론의 공진모드, 공진주파수 능의 공진 특성 결과가 제시될 것이다.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2018.10a
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• pp.78-78
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• 2018

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1997.11a
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• pp.262-265
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• 1997

Various polymeric electrolytes were prepared from PEG, PEO and PMMA with LiClO$_4$ to develop lithium conductive electrolytes for smart windows. The complementary electrochromic devices were fabricated with these electrolytes involving cathodically coloring WO$_3$ and anodically coloring V$_2$O$\sub$5/ thin films. The performance of electrochromic device with PMMA/LiCLO$_4$ electrolyte was found to be excellent

• Proceedings of the Materials Research Society of Korea Conference
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• 1998.08a
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• pp.117.2-117
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• 1998