• 제목/요약/키워드: gas purification

검색결과 219건 처리시간 0.035초

기체분리용 고분자 멤브레인의 최근 개발 동향 (A Numerical Analysis of Direct Contact Membrane Distillation for Hollow Fiber Membrane)

  • 김태헌;정종채;박종만;우창화
    • 멤브레인
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    • 제20권4호
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    • pp.267-277
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    • 2010
  • 가스분리막을 이용한 분리공정은 기존의 분리공정을 대체할 공정으로서 수십 년간 발전이 되어 왔다. 특히 분리막 공정은 가스분리에 있어서 기존공정에 비해서 에너지 소모가 적고 설치에 필요한 공간이 간소하며, 스케일업이 간단한 장점이 있다. 최근에는 기체분리막 공정은 질소발생장치, 수소발생장치, 막제습기, 선박이나 항공기용 불활성기체충진장치, 천연가스 정제, 바이오가스 정제, 연료전지분야에서 널리 사용이 되고 있으며, 향후에는 이산화탄소의 분리에도 강력한 대체공정으로 사용이 될 수 있다. 이러한 가스분리막 공정을 좀 더 널리 보급하기 위해서는 로베슨 플롯의 한계를 넘어설 수 있는 새로운 소재의 개발이 절실하며, 이러한 한계를 돌파하기 위하여 많은 연구자와 회사들이 카도그룹이나 스피로 구조를 가지는 고분자나 PIMs 같은 소재의 개발에 박차를 가하고 있다.

선 대 평판형 플라즈마 반응기 제작을 위한 전위 및 전계 해석 (Simulation of Electric Potential and Electric Field for Wire-Plate Type Plasma Reactor Manufacture)

  • 이동훈
    • 전기학회논문지P
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    • 제52권4호
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    • pp.167-171
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    • 2003
  • Due to advancement of industrialization, the flue gas from the combustion of industrial factories and various means of transportation have polluted air. Therefore, it is necessary to develop new techniques of air purification. In order to produce a more effective reactor, simulation were conducted using the Flux-II D program. The condition of the simulation were as follows: The height of the plate electrode was 0 mm or 2 mm higher than that of the wire electrode. The distance between the electrodes was 12 mm, and the diameter of the wire electrode was 0.5 mm or 1.0 mm. The results of the electric potential and electric field simulations show that pollutants will be more effectively removed due to the dielectric strength between wire electrode and plate electrode which was strong, and wire electrodes which were concentrated in a high electric field.

HFCLM Purification of SO2 from Flue Gas

  • Cha, Jun-Seok;K.K.Sirkar
    • 한국대기환경학회:학술대회논문집
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    • 한국대기환경학회 1997년도 한국대기보전학회 춘계학술대회 요지집
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    • pp.135-137
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    • 1997
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중공사형 기체분리막 모듈을 이용한 바이오가스의 분리 및 정제 (Separation and Purification of Bio Gas by Hollow Fiber Gas Separation Membrane Module)

  • 고형철;하성용;우승문;남상용;이병성;이충섭;최휘문
    • 멤브레인
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    • 제21권2호
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    • pp.177-192
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    • 2011
  • 바이오 가스의 분리와 정제를 위해 셀룰로오스 트리아세테이트(CTA) 고분자를 이용하여 중공사형 기체분리막을 상분리법에 의해 제조하고, 제조된 기체분리막을 사용하여 유효 막면적이 0.17 $m^2$인 중공사형 기체분리막 모듈을 제조하였다. 제조된 기체분리막 모듈의 순수 기체투과도틀 메탄, 산소, 이산화탄소에 대하여 측정하였다. 메탄의 투과도는 평균 0.46 GPU를 나타내었으며, 이산화탄소의 투과도는 평균 18.52 GPU였으며 이때 ${\alpha}CO_2$/$CH_4=40.4$를 나타내어 매우 높은 선택도를 나타내었다. 순수 가스 투과 테스트 후 혼합 가스에 대한 분리 정제 테스트를 4가지 모사가스에 대하여 진행하였으며 1 stage, 2 stage, 3 stage로 기체분리막 모듈을 구성하여 stage cut의 변화에 따른 각 부분에서 발생되는 기체의 농도 및 유량을 측정하였다. 1 stage에서는 stage cut이 상승함에 따라 메탄의 농도가 상승하는 것을 알 수 있었으며, 메탄 회수 효율은 떨어지는 것을 알 수 있었다. 2 stage 테스트에서는 1 stage와 유사한 거동을 보이는 것을 알 수 있었으며 메탄의 회수 효율은 1 stage보다 상승하는 것을 알 수 있었다. 바이오 가스 내에 존재하는 메탄의 손실을 줄이기 위해 3 stage 테스트를 진행하였으며, 그 결과 메탄가스의 손실율을 5% 이내로 줄일 수 있는 모듈의 배열을 찾아내었다.

Evaluation of a Prototype SF6 Purification System for Commercialization

  • Seo, Hai-Kyung;Lee, Jeong Eun;Kim, Kwang Sin;Kim, Kyeongsook
    • KEPCO Journal on Electric Power and Energy
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    • 제6권1호
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    • pp.53-58
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    • 2020
  • Korea Electric Power Corporation (KEPCO) uses large amount of SF6, one of the potent greenhouse gases, in electric equipment for electrical insulation. KEPCO is developing SF6 recovery and purification technology to minimize the release of SF6 into the environment, to secure certified emission reduction, and to save purchase cost of new SF6 by reusing the refined SF6. A prototype SF6 purification system using cryogenic solidification technology has been built in demonstration scale. To evaluate the feasibility of the commercialization, the system has been operated to purify large amount of used SF6 in a long-term operation and the performance has been economically evaluated. The system was stable enough for commercial operation such that it was able to purify 5.4 tons of used SF6 from power transmission equipment in 2-month operation. Over 99% of the SF6 was recovered from the used gas and the purity of the purified gas was over 99.7 vol%. The operation cost, which is the cost of refrigerant (liquid nitrogen), electricity and labor, per kilogram of purified SF6 was 6,526 KRW. Considering the price of new SF6 in Korea is about 15,000 KRW per kilogram this year, about 56% of the purchase cost can be saved.

레이저 회절 측정기를 이용한 벤츄리 캐비테이션에서의 마이크로버블 발생 특성 연구 (Study on Micro-bubble Generation Characteristics in Venturi Cavitation using Laser Diffractometer)

  • 임윤규;양해정;김영일
    • 드라이브 ㆍ 컨트롤
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    • 제16권1호
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    • pp.1-6
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    • 2019
  • The use of micro bubbles in industrial fields has been increasing in the recent years., particularly micro-bubble sterilization and water purification effects. Various methods have been developed for the generation of micro-bubbles. Depending on the method of generating bubbles, the micro-bubbles can be roughly classified into saturation molding, cavitation and rotation flow types. The objective of this study was to use ventilated tube type as a method of generating micro-bubbles in order to purify large amount of water quality such as lakes and reservoirs. This method shows a difference in efficiency in which micro-bubbles are generated depending on the contact ratio of gas to liquid. The study also investigated the optimal gas liquid contact ratio by applying various orifice methods and investigated the optimum condition of micro-bubble generation by gas Based on this, a technology to develop a micro-bubble generator with a venturi type nozzle shape that has a high water purification effect was developed.

개질 수소 정제용 PSA 공정을 위한 CO 흡착제의 성능 평가 (The Evaluation of CO Adsorbents Used in PSA Process for the Purification of Reformed Hydrogen)

  • 박진남
    • 한국수소및신에너지학회논문집
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    • 제27권6호
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    • pp.628-635
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    • 2016
  • Natural gas reformed hydrogen is used as a fuel of fuel cell vehicle, PSA process is used for the purification of reformed hydrogen. In this study, the performance of CO adsorbent in PSA process was evaluated. Zeolite adsorbents used in the commercial PSA process is used. The physical and chemical properties of adsorbents were characterized using BET apparatus, XRD, and FE-SEM. The breakthrough apparatus modified from GC was used for the CO breakthrough experiment, the quantitative analysis of CO adsorption capacity was performed using CO breakthrough curve. Zeolite 10X and 13X showed superior CO adsorption capacity than activated alumina. The CO adsorption capacity of zeolite 10X is more than twice of zeolite 13X even the BET surface area is low. It seems that the presence of $Ca^{2+}$ cation in zeolite 10X is beneficial to the adsorption of CO.

Low Calorific Gasturbine 매립지 적용 및 유리온실 운용기술 설계 (Design for Landfill Gas Appliation by Low Calorific Gas Turbine and Green House Optimization Technology)

  • 허광범;박정극;이정빈;임상규
    • 신재생에너지
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    • 제6권2호
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    • pp.27-32
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    • 2010
  • Low Calorific Gas Turbine (LCGT) has been developed as a next generation power system using landfill gas (LFG) and biogas made from various organic wastes, food Waste, waste water and Livestock biogas. Low calorific fuel purification by pretreatment system and carbon dioxide fixation by green house system are very important design target for the optimum applications of LCGT. Main troubles of Low Calorific Gas Turbine system was derived from the impurities such as hydro sulfide, siloxane, water contained in biogas. Even if the quality of the bio fuel is not better than natural gas, LCGT may take low quality gas fuel and environmental friendly power system. The mechanical characterisitics of LCGT system is a high energy efficiency (>70%), wide range of output power (30 kW - 30 MW class) and very clean emission from power system (low NOx). A green house has been designed for four different carbon dioxide concentration from ambient air to 2000 ppm by utilizing the exhaust gas and hot water from LCGT system. LCGT is expected to contribute achieving the target of Renewable Portfolio Standards (RPS).