• 한국산학기술학회논문지
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• 제1권2호
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• pp.33-40
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• 2000

본 연구는 반도체 크린룸에서 VOC(volatile organic compound)과 수분을 제거하기 위한 흡착로타에 관한 것이다. 흡착로타는 세라믹 페이퍼 허니컴 기질에 NaX 제올라이트와 TS-1 제올라이트로 만들어졌다. NaX 제올라이트는 수열합성법으로 합성되어졌으며, NaX 제올라이트 결정(2∼3 ㎛)을 seed로 합성 조성에 3∼5 wt%까지 첨가하여 5 ㎛의 균일한 NaX 제올라이트를 성장시켰다. Seed의 첨가는 seed를 첨가하지 않은 합성용액과 비교하여 결정의 크기가 크며, 균일한 NaX 제올라이트 결정을 성공적으로 합성하였다. TS-1 제올라이트는 초기 반응액의 pH를 변화시켜 합성하였다. 반응물의 pH는 10.0에서 11.5 까지의 범위를 가지며, PH 10.4에서 큰 기공(8∼10 (equation omitted))을 가진 TS-1 제올라이트(ETS-10)가 합성되는 반면 pH가 11.5에서는 작은 기공 (3∼5 (equation omitted))을 갖는 TS-1 제올라이트(ETS-4)가 합성되었다.

• 한국환경과학회지
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• 제18권3호
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• pp.283-288
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• 2009

This is a study on the volatile organic compounds(VOCs) concentrator with zeolite adsorptive honey rotor and catalytic combustion system for abating VOCs emitted from printing industry. VOCs emitted from the printing industry is mainly caused by organic solvent of printing ink. The content of organic solvents in printing ink varies from 40% to 75% and its content in the gravure ink is higher than that in any other ink. The average concentrations of each VOCs are 139 ppm for toluene, 152.1 ppm for MEK, 256.9 ppm for methanol and 42.9 ppm for isopropyl alcohol. We used zeolite honeycomb for absorbent of VOCs concentrator and palladium for catalyst combustion system. This system abated over 96% of emitted total VOCs, 98% of toluene, 100% of MEK, 92% of methanol and, 100% of isopropyl alcohol. It is concluded that the low-leveled high-volume VOCs emitted from printing process were removed almost by concentrator with zeolite adsorptive honey rotor and catalytic combustion system.

• Korean Chemical Engineering Research
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• 제44권3호
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• pp.254-258
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• 2006

휘발성 유기화합물을 제거하는 허니콤 흡착제의 제조 성분인 무기질 섬유에 흡착력이 뛰어난 제올라이트를 화학 결합시켰다. 무기질 섬유를 염산, 황산 또는 플루오르화 수소산 등으로 처리하여 표면의 불순물을 제거하여 제올라이트의 접합 능력을 향상시켰다. 무기질 섬유와 제올라이트의 표면에 매달은 클로로프로필, 아미노프로필 또는 에폭시기 등을 서로 반응시켜 두 물질을 화학 결합시켰으며, 연결 화합물로 고분자 폴리에틸렌이민을 사용하기도 하였다. 결합상태는 전자현미경으로 관찰하였고, BET 표면적 분석을 통하여 제올라이트 접합량을 유추하였다. 폴리에틸렌이민을 사용하면 제올라이트를 무기질 섬유에 많이 결합시킬 수 있었다.

• 한국세라믹학회지
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• 제42권10호
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• pp.654-659
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• 2005

The ceramic paper, which could adsorb VOC's effectively, was made by paper-making method with zeolite and ceramic fiber as main constituents. By this experiment, the optimal composition of the slurry for the ceramic paper formation was established. SEM observation showed that zeolite powder was uniformly dispersed and adhered to the paper by applying inorganic binder. The two type zeolites content in the ceramic paper was 26 wt$\%$ and its BET surface area was 131 $m^{2}$/g. The thickness and the basis weight of the ceramic paper were 0.2 mm and 130 g/$m^{2}$ respectively, and it had sufficient tensile characteristics to withstand tensile stress without tearing during corrugation. The total inorganic content of the paper was 78 wt$ \% $ and organic content was 22 wt$\%$. The equilibrium loading amount of toluene at the toluene at the toluene partial pressure of 0.2 mmHg was 3.2 wt$\%$.

• Journal of Mechanical Science and Technology
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• 제14권6호
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• pp.699-703
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• 2000

Experiments were carried out to investigate the characteristics of the hydrocarbon (HC) emissions and to reduce cold start hydrocarbons in gasoline engines. An HC adsorber was, used and it coated was by Pd/Rh catalyst with zeolite on a honeycomb monolith. The HCs were efficiently trapped at temperatures below $100^{\circ}C by physical adsorption. After adsorption, they were reduced gradually by the catalytic oxidation of Pd/Rh catalysts as the adsorber temperature increased above $100^{\circ}C. Increasing amounts of methane, ethylene and n-butane were emitted as the fuel-air mixture became richer and the engine speed decreased. As the temperature of adsorber increased, high-number carbons into low-number carbons. Thus, the C4 concentration decreased significantly during the first 30 seconds, and the C2 concentration increased continuously.