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알칼리 흡수제의 탄산화반응을 이용한 고농도 CO<sub>2</sub> 포집특성
김병환 ( Byung-hwan Kim ),강필선 ( Pil-sun Kang ),유승관 ( Seung-kwan Yoo ) 한국폐기물자원순환학회 2016 한국폐기물자원순환학회지 Vol.33 No.3
Mineral carbonation is one of the safest permanent carbon dioxide sequestration methods. Carbon Capture & Utilization (CCU) is a process that utilizes available resources by removing carbon dioxide in a method of mineral carbonation. It can be applied to industries producing high carbon dioxide emissions. This study aims to investigate the absorption performance of carbon dioxide at high concentrations. Calcium hydroxide suspension was used as an absorbent. In addition, NaOH and Mg(OH)<sub>2</sub> were used as additives. Carbon dioxide removal efficiency with NaOH increased from 30% to 90% when the additive amount was increased from 1wt% to 3wt%. In the case of Mg(OH)<sub>2</sub>, carbon dioxide absorption efficiency was minimal regardless of the additive amount. In addition, the solid byproducts werec onfirmed by X-ray diffraction spectra and SEM images.
하드 디스크 드라이브에서 Smooth 디스크와 LZT 디스크가 입자 발생에 미치는 영향
이대영 ( Dae Young Lee ),허선영 ( Sun Young Huh ),강필선 ( Pil Sun Kang ),황정호 ( Jung Ho Hwang ),조긍연 ( Keung Young Cho ),강태식 ( Tae Sik Kang ) 정보저장시스템학회 2005 추계학술대회논문집 Vol.2005 No.-
The head to disk spacing must be decreased to increase recording densities in hard disk drives. Recently, to decrease the head to disk spacing, smooth disk having no bumps onto the lading zone has used. In this research, we compared the number of particles generated in HDD with smooth and textured disks. We used a sampling method using a particle sampler and a epe (condensation particle counter) to detect particles in HDD. First, we sampled and counted particles generated with disk rotational speed and various rest times when the smooth disk and textured disks were used, then analyzed the sampled particles by SEM (scanning electron microscopy) and AES (auger electron spectroscopy). In results of measuring particles, more particles in case of LZT disk drive generated than that of the smooth disk drive in all test modes. The number of particles generated in the smooth disk was very low. The particle generation increased as the rest time increased (smooth/LZT disks) and more particles in case of LZT disk drive generated than that of the smooth disk drive. In results of analyzing particle components, AI, Ti, Si components were detected and we could not found differences between components in case of smooth/LZT disk drive.
Lab-scale 반응기에서 RPF 열분해 가스의 가스화에 의한 합성 가스의 생성에 대한 연구
배수우(Bae, Su-Woo),서동균(Seo, Dong-Kyun),강필선(Kang, Pil-Sun),송순호(Song, Soon-Ho),류태우(Yu, Tae-U),황정호(Hwang, Jung-Ho) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.11
This paper provides RPF (Refuse Plastics Fuel) gasification characteristics for generating synthesis gas in gasfying reactor which was design in lab-scale. This research is carried out as an immediate work for making pyrolysis gas from RPF into energy resource. This study is consisted of experimental and numerical. The numerical study was accomplished from RPF pyrolysis data, and predicted the maximum operating conditions by STANJAN and FLEUNT. Based on results of STANJAN, it is found that the maximum point of O₂/O_{2,stoich}=20{sim}30, which is used as injection point of O₂. Experiment results shows that CO and H₂ were increased but THC was decreased as temperature was increased. It is estimated that the cracking of cracking of THC into CO and H2 is happened at a high temperature. It is observed that as steam was injected, production of CO and H2 were increased, then, H2 is dependent on the amount of injectionsteam.
HDD에서 Smooth 디스크와 Texture 디스크가 HDI의 마찰대전에 미치는 영향
이대영 ( Dae Young Lee ),이래준 ( Rae Jun Lee ),강필선 ( Pil Sun Kang ),한제희 ( Je Hee Han ),황정호 ( Jung Ho Hwang ),김대은 ( Dae Eun Kim ),조긍연 ( Keung Youn Cho ),강태식 ( Tae Sik Kang ) 정보저장시스템학회 2005 추계학술대회논문집 Vol.2005 No.-
The tribocharge build-up in the slider disk interface can cause ESD (electrostatic discharge) damage. In turn, ESD can cause severe melting damage to MR or GMR heads. We investigated the tribovoltage/current build-up with smooth and textured disks in HDD, operating at increasing disk accelerations. We found that tribovoltage/current were generated during pico-slider/disk interaction and those levels were about 0.1 ~ 0.3 V and 10 - 40 pA, respectively. Tribovoltage/current were abruptly increased and dissipated within the acceleration time in the case of textured disk but in the case of smooth disk, tribovoltage was continuously increased until the end of uniform velocity region and the tribocurrent did not dissipate within the acceleration time. In the case of textured disk, tribovoltage/current was reduced with increasing disk acceleration, but in the case of smooth disk it was increased.
명정구,조선형,박정호,백상규,김종만,강필선 한국어류학회 2003 韓國魚類學會誌 Vol.15 No.3
1. 2002년 10월 16∼17일에 스쿠버다이빙, 수중 촬영을 통하여 전라남도 신안군 가거도 주변 가을철 연안의 어류상을 조사한 결과 총 5목 23과 40종이 확인되었고, 지금까지 기재 된 어종 이외에 18종이 추가로 확인되었다. 2. 어종 구성으로 보면 양볼락과가 7종으로 가장 많았으며, 그 다음으로 둑중개과가 4종, 자리돔과가 3종 순이었다. 3. 가거도 주변에서 지금까지 확인된 어종들은 온대성 어종이 대부분이었지만, 그 외에 노랑자리돔, 청황베도라치 및 파랑돔 등 난류성 또는 아열대 어종이 확인되어 제주도나 독도와 마찬가지로 대마난류의 영향도 받고 있음을 나타내었다. The fish fauna in the coastal waters of Gageodo Island, South-west Sea, was investigated by SCUBA diving in October 16 and 17, 2002. The fishes observed were classified into 40 species in 23 families. In Autumn, subtropical fishes in such as families as Pomacentridae, Pomacanthidae and Apogonidae, represented 12.5% of the total, while eurythermal species represented 72.5%.