• 한국염색가공학회지
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• 제27권1호
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• pp.50-61
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• 2015

The merits of activated carbon for removal of organic compounds have been well known in the various industrial fields. Fixing methods with activated carbon in the non-woven fabric have the advantages of fast adsorption and ease of handling when compared with bonding and coating methods. In this study, we have examined deodorization of non-woven fabrics fixed with activated carbon. We have been tested the deodorization of various kinds activated carbon and non-woven fabric structures. The effective mixing ratio of activated carbon was 5% on the weight of fabrics, which are closely related to the fabric structure. The activated carbon with higher mesh size show the better deodorization effect.

• Carbon letters
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• 제15권1호
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• pp.45-49
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• 2014

In this study, synthetic viscose rayon fabric has been used for preparing activated carbon fabric (ACF), impregnated with different concentrations of $H_3PO_4$. The effect of $H_3PO_4$ impregnation on the weight yield, surface area, pore volume, chemical composition and morphology of ACF were studied. Experimental results revealed that both Brunauer-Emmett-Teller surface area and micropore volume increased with increasing $H_3PO_4$ concentration; however, the weight yield and microporosity (%) decreased. It was observed that samples impregnated at $70^{\circ}C$ (AC-70) give higher yield and higher microporosity as compared to $30^{\circ}C$ (AC-30). The average pore size of the ACF also gradually increases from 18.2 to 19 and 16.7 to $20.4{\AA}$ for $30^{\circ}C$ and $70^{\circ}C$, respectively. The pore size distribution of ACF was also studied. It is also concluded that the final ACF strength is dependent on the concentration of impregnant.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2009년도 하계학술발표대회 논문집
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• pp.739-744
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• 2009

The filter has long been used in purification processes for indoor air quality. To determine the deodorization effect of several filter materials in a full-scale air-handling system, the present study has been carried out using a wind tunnel equipped with a heat exchanger and various filter materials, such as commercial fabric, activated carbon(AC) and silver nano-particles attached to activated carbon(Ag-AC). The experiment was conducted using an odor substance with ammonia, acetaldehyde, acetic acid. The results obtained indicate that odor substance is substantially decreased on the moisture condensation on the surface of the heat exchanger. The fabric filter has no effect for removal of odor substances. The deodorization efficiency is found to be approximately 7% in the AC filter, while the deodorization efficiency is increased up to 10% using the Ag-AC filter.

• 설비공학논문집
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• 제21권10호
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• pp.583-589
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• 2009

Activated carbon has long been used in purification processes for indoor air quality. However, the bioaerosol removal by activated carbon is not often sufficient to be used in an air control devise. In order to overcome these problems, silver nano-particles have been proposed as an antibacterial agent on the surface of activated carbon. Silver or silver ions have been known for antimicrobial activities. In this study, bioaerosol generated by using an Escherichia coli culture was introduced to a lab-scale column packed with activated carbon (AC) and silver nano-particles attached to activated carbon (Ag-AC). E. coli was almost completely removed in the Ag-AC column, whereas bioaerosol penetrated through the AC column. To determine the antibacterial effect of different filter materials in a full-scale air-handling system, another experiment was conducted using a wind tunnel equipped with a heat exchanger and three filter materials including commercial fabric, AC and Ag-AC. It was found that E. coli proliferated on the surface of the heat exchanger after 5 days, which dramatically increased bioaerosol counts in the effluent air stream. The fabric filter could not control the increased bioaerosol and most of the E. coli penetrated the filter. The bacterial removal efficiency was found to be approximately 45% in the AC filter, while the antibacterial efficiency increased to 70% using the Ag-AC filter. Consequently, the Ag-AC filter can be an effective method to control bioaerosol and improve indoor air quality.

• Bulletin of the Korean Chemical Society
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• 제34권2호
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• pp.569-573
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• 2013

In this study, activated carbon fabric was prepared from a cellulose-based polymer (viscose rayon) via a combination of physical and chemical activation (mixed activation) processes by means of $CO_2$ as a gasifying agent and surface and adsorption properties were evaluated. Experiments were performed to investigate the consequence of activation temperature (750, 800, 850 and $925^{\circ}C$), activation time (15, 30, 45 and 60 minutes) and $CO_2$ flow rate (100, 200, 300 and 400 mL/min) on the surface and adsorption properties of ACF. The nitrogen adsorption isotherm at 77 K was measured and used for the determination of surface area, total pore volume, micropore volume, mesopore volume and pore size distribution using BET, t-plot, DR, BJH and DFT methods, respectively. It was observed that BET surface area and TPV increase with rising activation temperature and time due to the formation of new pores and the alteration of micropores into mesopores. It was also found that activation temperature dominantly affects the surface properties of ACF. The adsorption of iodine and $CCl_4$ onto ACF was investigated and both were found to correlate with surface area.

• Korean Chemical Engineering Research
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• 제60권3호
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• pp.377-385
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• 2022

우리나라 전통 숯가마로부터 제조된 숯의 표면형상과 흡착특성을 분석한 후, 습도와 온도를 조절하면서 이들의 수분 흡착성능을 측정하고 황토, 활성탄소섬유 직포 및 활성탄소섬유 종이의 수분 흡착성능과 비교하였다. 숯은 소수성이므로 45% 이하의 습도에서는 수분을 잘 흡착하지 않지만 습도가 증가하면 흡착성능이 서서히 1차식에 비례하여 증가하였다. 황토 분말도 낮은 습도에서는 숯과 유사했지만 습도가 증가하면 흡착성능이 기하급수적으로 증가하면서 Type V 등온흡착곡선을 보였다. 따라서 조선시대에 기상청 직원들이 숯과 황토의 수분 흡착능력을 일기예보에 적용하였다는 기록을 실험적으로 확인할 수 있었다. 활성탄소섬유 직포와 활성탄소섬유 종이는 수분 흡착능력이 월등하고 신속한 반응을 보이므로 습도측정 센서에 적용할 수 있다고 판단된다. 숯 조각의 등온흡착 및 탈착곡선 측정에서 흡착질인 질소의 탈착이 잘 이루어지지 않아 낮은 압력 이력현상(low-pressure hysteresis)이라는 독특한 Type I과 Type IV의 혼합형태를 보이는데, 이는 질소입자가 흡착시에 숯 세공의 틈새를 비비고 들어가 단단히 끼었다가 탈착시에 빠져나오지 않기 때문이다. 숯을 분말로 분쇄하면 이러한 틈새들이 분쇄되어 비표면적이 증가하고 낮은 상대압력에서 흡착질의 탈착량이 증가되었다.

• 한국환경보건학회지
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• 제35권4호
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• pp.295-303
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• 2009

A simulated wastewater containing the dye Rhodamine B (RhB) was electrolytically treated using a three-dimensional electrode reactor equipped with granular activated carbon (GAC) as particle electrode. The effect of type of packing material (GAC, ACF, Nonwoven fabric fiber coated with activated carbon), amounts of GAC packing (25-100 g), current (0.5-3 A) and electrolyte concentration (0.5-3 g/l) was evaluated. Experimental results showed that performance for RhB decolorization of the 3 three-dimensional electrodes lie in: GAC > Nonwoven fabric fiber > ACF. When considered RhB decolorization, oxidants concentration and electric power, optimum GAC dosage was 50 g. Generated concentration of 3 oxidants ($ClO_2$, free Cl, $H_2O_2$) was increased with increase of applied current, however optimum current for RhB degradation was 2.5 A. The oxidants concentration was increased with increase of NaCl concentration and optimum NaCl dosage for RhB degradation was 1.5 g/l.

• 한국입자에어로졸학회지
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• 제6권4호
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• pp.173-183
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• 2010

The high temperature pleated filter bags which were used during this study were made of pleated nonwoven fabric of heat and acid resistant polysulfonate fibers which can withstand the heat up to $300^{\circ}C$ and have a filtration area which is 3 to 5 times larger than the conventional round filter bags. Cartridge module packed with 3 kind of the sulfur impregnated activated-carbon based sorbents were inserted in the inner of the pleated filter bag. This type of pleated filter bag was designed to remove not only the particulate matter but also the gaseous elemental mercury. The electrostatic precipitator part can enhance the particulate removal efficiency and reduce the pressure drop of the pleated filter bag by agglomerated particles to form a more porous dust layer on the surface of the pleated bag which is increased the filter bag cleaning efficiency. In addition, the most of particles are separated from the flue gas stream through the cyclone and the electrostatic precipitator part which were installed at the lower part and main body part of the convergence particulate collector, respectively. Thus reduce particulate loading of the high temperature pleated filter bags were applied in this study to analyze the removal characteristics of particulate matter and gaseous elemental mercury.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2020년도 가을 학술논문 발표대회
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• pp.157-158
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• 2020

The present study examined the effectiveness of textile fabrics coated with nano-pore materials on removing the nitrogen oxide (NO_X) and sulfur oxide (SO_X) in the atmospheric environment. The tested approach is favorable for absorbing NO_X and SO_X, even under the washing condition.

• 대한환경공학회지
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• 제35권10호
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• pp.717-723
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• 2013

대한민국 환경부는 전국 대도시 측정소의 절반 이상에서 초미세먼지(Particulate Matter, $PM_{2.5}$) 농도가 기준치를 초과함으로서 국민의 건강보호를 위한 초미세먼지 제거대책을 추진 중에 있다. 전주시 중심가에서 여러 가지 주행조건을 달리하고 주행 중에 승용차내 초미세먼지를 측정한 결과 공기순환모드(Actuator)를 내기모드로, 송풍기(Blower)를 2단으로 조절한 경우에 초미세먼지의 감소속도가 가장 신속하고 낮은 농도를 유지하였다. 주행중에 창문을 열면 외부의 오염원 진입과 더불어 내부 먼지의 비산이 발생하였으며 탑승인원의 증가도 초미세먼지의 비산을 유발하였다. 공기 청정용 필터는 현재 사용중인 절곡 폴리프로필렌 부직포가 가장 우수했으나, 초미세먼지와 함께 휘발성 유기물질의 제거를 위하여는 탄소흡착제인 활성탄소섬유(Activated Carbon Fiber Filter) 부직포 필터의 사용이 훨씬 효과적일 것으로 판단된다.