• 한국대기환경학회지
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• 제20권5호
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• pp.655-662
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• 2004

An adsorption process to recover the pure $CH_4\;and\;CO_2$ from its mixture was examined. In this study, activated carbon fibers were used as a selective adsorbent. The activated carbon fibers has 78~94% micropore volume and 10.5~20.3${\AA}$ narrow pore size, and showed high adsorption rate and the good selectivity for $CO_2$ under the ambient pressure. The ACF with high surface area showed short mass transfer zone and long breakthrough time and, its adsorption capacity depended on the microporosity. Compared with single component adsorption, the amount adsorbed $CO_2$ on ACF increased by the roll-up of $CH_4$ in mixed gases. The adsorption selectivity increased as now rate and $CO_2$ concentration of mixed gases increased, showing 5.2 selectivity for 75% $CO_2$ concentration.

• 한국연초학회지
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• 제35권1호
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• pp.7-12
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• 2013

A Solid-phase micro extraction(SPME) was evaluated as a tool for headspace sampling of tobacco samples. Several experimental parameters (sampling temperature, pH, and type of SPME fibers) were optimized to improve sampling efficiency in two aspects ; maximum adsorption and selective adsorption of volatile organic acids onto SPME fibers. Among four types of SPME fibers such as PDMS(Polydimethylsiloxane), PA(Polyacrylate), Car/PDMS (Carboxen/Polydimethylsiioxane) and PDMS/DVB(Polydimethylsiioxane/Divinylbenzene) which were investigated to determine the selectivity and adsorption efficiency. A variety of tobacco samples such as flue cured, burley and oriental were used in this study. The effect of these parameters was often dominated by the physical and chemical nature (volatility, polarity) of target compounds. This method allowed us to make important improvements in selectivity and sensitivity. The Car/PDMS fiber was shown to be the most efficient at extracting the 10 selected volatile organic acids. The parameters were optimized: $80^{\circ}C$ adsorption temperature, 30 min of adsorption time, $240^{\circ}C$ desorption temperature, 1 min of adsorption time.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2001년도 추계학술발표대회
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• pp.685-688
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• 2001

분자각인 막에 대한 선택적인 홉착을 알아보기 위해서 우리는 템플릿을 바꾸어 보기도 하고 중합방법과 세척조건을 다르게 하였다. 결과에서 우리는 템플릿 탈착에는 아세트산 10% 수용액으로 세척한 경우 가장 우수한 회수도를 보였다. 그러고 In-situ implanting method가 post implanting method에 비해 약 1.8 나 더 나은 선택 흡착성을 보였다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2000년도 제2회 학술대회 논문집 일렉트렛트 및 응용기술전문연구회
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• pp.45-49
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• 2000

An ozone condenser by a selective adsorption on the silica gel surface is constructed. Ozone density is evaluated by three methods; ultraviolet absorption, thermal decomposition and Q-mass analyzing methods. Thermal decomposition method is found to be available to the density evaluation from dilute to highly condensed ozone. The highest ozone density condensed by the adsorption method is evaluated to be 97 mol%.

• Bulletin of the Korean Chemical Society
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• 제31권6호
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• pp.1459-1460
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• 2010

• 한국지하수토양환경학회:학술대회논문집
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• 한국지하수토양환경학회 2005년도 INTERNATIONAL SYMPOSIUM ON SOIL & GROUNDWATER ENVIRONMENT
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• pp.169-170
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• 2005

• 진공이야기
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• 제5권1호
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• pp.9-12
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• 2018

Electronic nose has been developed for detection of various hazardous molecules, especially vapor organic compounds (VOCs), by adsorption and desorption phenomenon. However, although conventional electronic noses have provided many advantages such as simple detection and high sensitivity, they still need advanced technologies for selective specificity in real samples. In this review, we provide bionanoelectronic noses with natural receptors for selective odorant detection. This review includes from fabrication of natural receptors and conducting nanomaterials to bioelectronic noses. We also discussed their perspective applications for the future at the conclusion.

• 한국환경과학회지
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• 제15권4호
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• pp.341-347
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• 2006

Adsorption characteristics of benzene by zeolite were investigated using irradiating microwave. Experimental apparatus was applied to a U-type fix-bed column equipped with microwave system. Zeolite, itself, seems to be inappropriated to remove benzene because of a hygroscopic property, Microwave irradiation to zeolite, however, brings about decreasing $H_{2}O$ adsorption and increasing benzene adsorption. This causes that the dipole material such as $H_{2}O$ was vibrated and heated by irradiation of microwave and desorbed from zeolite. And then, benzene starts to be absorbed by zeolite. In this study, the results showed that the selective adsorption of benzene was occurred by the microwave irradiation and the adsorption capacity of benzene was increased by increasing microwave energy. As a results, it was found that the zeolite could be used to adsorb benzene with microwave and this method make it feasible simultaneously to adsorb and desorb benzene.

• 공업화학
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• 제18권5호
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• pp.459-466
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• 2007

본 연구에서는 다양한 금속들이 담지된 H형 베타 제올라이트(BEA)를 황성분 함유 부취제 제거용 흡착제로 활용하였다. 단일 금속이 담지되거나 또는 두 종류의 금속이 복합적으로 함유된 여러 종류의 흡착제를 사용하여 연속적인 흡착층에서 THT와 TBM 부취제에 대한 개별적 혹은 경쟁적인 흡착 특성을 평가하였다. 순수한 H형 BEA 제올라이트는 TBM 화합물에 대하여 가장 높은 흡착능력을 나타내었으며, THT 부취제는 Fe, Pd 금속 및 ZnO를 함유한 HBEA상에서 더 많은 양으로 흡착 제거되었다. 복합금속함유 흡착제의 경우에는 Cu-Zn/HBEA와 Fe-Mo/HBEA가 TBM 부취제에 대하여 더 높은 흡착용량을 나타내었다.

• 자원리싸이클링
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• 제28권2호
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• pp.54-61
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• 2019

블랙드로스로부터 고순도 알루미나를 회수하기 위해 기계적 활성화 처리한 블랙드로스를 수산화나트륨용액으로 침출하면 미량의 규소(IV)가 함유된 알루미네이트 용액을 얻을 수 있다. 본 연구에서는 hydrotalcite를 사용하여 알루미늄(III)과 규소(IV)의 농도가 각각 13000과 150 mg/L인 5 M의 수산화나트륨용액에서 규소(IV)의 선택적 흡착거동에 대하여 조사했다. Hydrotalcite는 수산화나트륨용액으로부터 규소(IV)만을 선택적으로 흡착하였다. Hydrotalcite의 소성과 농도 및 NaOH의 농도가 규소(IV)의 흡착에 미치는 영향을 조사하였다. 5 M의 수산화나트륨용액에서 규소(IV)의 흡착률은 낮으나 물로 48배 희석하여 소성한 hydrotalcite의 농도가 4.5 g/L 이상인 조건에서 규소(IV)를 대부분 흡착시켜 고순도 알루미나용액을 회수할 수 있었다. 소성한 hydrotalcite에서 규소(IV)의 흡착은 Freundlich 등온흡착식과 잘 일치하였다.