• Title/Summary/Keyword: 청정수소

Search Result 273, Processing Time 0.026 seconds

An Experimental Study on the Performance Characteristics of a Hydrogen Fueled LPi Engine (LPi기관에서 수소첨가에 따른 성능특성에 관한 실험적연구)

  • Choi, Gyeung Ho
    • Transactions of the Korean hydrogen and new energy society
    • /
    • v.15 no.2
    • /
    • pp.129-136
    • /
    • 2004
  • 환경문제와 석유자원의 고갈이 많은 연구자들을 기존 탄화수소연료를 대체할수 있는 재생 가능한 연료를 구하는데 많은 노력을 기울이고 있다. 수소연료는 유해배기물질이 없는 연소와 또한 연소후에 재생 가능한 물성분만 배출하는 속성으로 미래의 청정에너지로 각광을 받고 있다. 이러한 이유로 수소연료는 수송기계의 연료로도 주목을 받고 있다. 따라서 수소연료기관 개발은 21세기에도 지속적으로 진행될 것이다. 이에대한 초기연구로 기체 LPG 연료가 아닌 액체 LPG 연료를 흡기관에 분사하여 기화된 LPG 연료를 엔진으로 흡입하는 LPi엔진에 수소연료를 과급하여 엔진에 성능을 연구하고자 하였다.

Effect of Catalyst plated Titanium-mesh Electrodes in Water Electrolysis using Solid Polymer Electrolyte (Ti Mesh처리 촉매전극/SPE 가 전기분해에 미치는 영향)

  • 김연순;박기배;명광식;심규성;한상도
    • Proceedings of the Korea Society for Energy Engineering kosee Conference
    • /
    • 1998.05a
    • /
    • pp.167-171
    • /
    • 1998
  • 수소는 2차 에너지원으로 그 자원이 풍부하며 청정에너지원으로 지구 환경문제를 해결할 수 있는 에너지로 주목을 받고 있다. 현재 무공해 수소를 제조하는 방법으로는 불을 전기 분해하는 방법 이외에 태양에너지 이용법, 바이오기술, 화학순환기술, 화석연료 분해법 등이 보고되고 있으며 모두 기초연구 단계에 있다. 이중에서 전기분해에 의한 수소의 제조기술은 경제성 및 효율향상을 위해 가장 많이 연구되고 있고 이미 우주선, 잠수함 등 특수용도로는 실용화되고 있는 기술이다. (중략)

  • PDF

Influence of Temperature on Separation of CO and H2 Mixed Gas Using Polyamide Composite Membrane (폴리아마이드 복합막을 이용한 일산화탄소 및 수소 혼합가스의 분리특성에 대한 온도의 영향)

  • Choi, Kyung Seok;Poudel, Jeeban;Oh, Sea Cheon
    • Clean Technology
    • /
    • v.18 no.4
    • /
    • pp.360-365
    • /
    • 2012
  • With rapid increase in municipal solid waste (MSW) due to the rising economy, solid waste gasification emerges as one of the promising technologies. Separation of the carbon monoxide (CO) and hydrogen ($H_2$) from syngas obtained by gasification of MSW was studied using the polyamide composite membrane. The separation characteristics of the CO and $H_2$ were studied at different gas flow rates and stage cuts. The permeability of CO and $H_2$ along with the selectivity of $H_2$ with respect to CO was obtained. Furthermore, the Arrhenius plots were obtained to estimate the activation energies of CO and $H_2$ permeabilites.

Development of Hydrogen Production Technology from Coal Gasification (석탄가스화 수소생산 기술개발)

  • Kim, Jae-Sung;Lee, Jong-Min;Kim, Dong-Won
    • 한국신재생에너지학회:학술대회논문집
    • /
    • 2007.11a
    • /
    • pp.462-465
    • /
    • 2007
  • 석탄가스화 수소생산 기술 분야는 석탄 등의 화석연료를 이용하여 고온, 고압하에서 반응가스(산소, 수증기, 수소)와의 화학적 반응을 통해 생산된 연소성 가스 ($H_2$, CO, $CO_2$ 등)를 전환반응(WGS) 및 분리반응을 거쳐 효율적으로 청정하게 수소를 생산해 내는 기술이다. 전력산업에서 석탄가스화 수소생산은 그 사용 방법(연료전지, 수소 터빈, 분산 이용 등)에 따라 발전시스템의 고효율화를 지향하고, zero-emission을 실현하는 첨단 발전 시스템의 종합 구현을 목표로 하고 있으며, 더불어, 도래하는 수소 경제로의 전이에 대비에 석탄을 이용한 중앙(Central) 수소생산 시스템을 구현하여 이송 및 전환을 통한 지역적 분산 이용을 가능케 하는 종합적인 인프라를 구축하는 기술이다. 본 기술에는 석탄가스화 기술, 수성가스 전환기술, 수소/$CO_2$ 분리기술, 이송용 연료 전환기술 등이 포함된다. 석탄가스화 수소생산 기술은 급등하는 오일 가격과 이의 수입사용 증가에 대응하기 위한 에너지 안보 대책 마련 및 효율 극대화의 필요성과 더불어, 전력산업에서 화력 발전시스템의 궁극적 실현 목표인 고효율, 초청정의 전력생산 시스템의 구현을 가능케 하여, 향후 화석 연료를 이용한 미래 발전 기술을 선도 할 것으로 기대된다. 더불어, 수소 경제로의 전환 시 수소 수요의 급팽창에 대비한 경제적인 대규모 수소생산 기술의 개발이 필요하며, 이에 기술 실현성이 가장 높은 석탄가스화 수소생산 기술의 개발 구현이 요구된다.

  • PDF

Study on Sizing Calculation Method of Fuel Cell Propulsion Multirotor (연료전지 추진 멀티콥터의 사이징 계산 방법에 관한 연구)

  • LEE, DONGKEUN;AHN, KOOKYOUNG;KIM, YOUNGSANG
    • Transactions of the Korean hydrogen and new energy society
    • /
    • v.32 no.6
    • /
    • pp.542-550
    • /
    • 2021
  • As the application of multirotor grows, the demands for multirotor that can fly longer and load more are increasing. Hydrogen has a high energy density, so it can satisfy these demands when used in multirotor. In order to design hydrogen fueled multirotor that satisfies the desired flight time and payload, it is important to calculate the specifications of a fuel cell, battery, and hydrogen storage system. This paper contains detailed information on various energy systems used in multirotor and fuel cell powered multirotor research trends. This study proposed a sizing calculation method that meets the target flight time and payload using thrust and power equations. It has been explained how the two equations derive the particular specifications. The specifications of the multirotor were derived by assuming a payload of 50 kg and a flight time of 1 hour. In addition, the effects of the values of the fuel cell, hydrogen storage system, and motor propeller were analyzed.

Mid-Temperature Operation Characteristics of Commercial Reforming Catalysts: Comparison of Ru-Based and Ni-Based Catalyst (상용 개질촉매의 중온 영역 운전 특성: Ru 촉매와 Ni 촉매 비교)

  • KIM, YOUNGSANG;LEE, KANGHUN;LEE, DONGKEUN;LEE, YOUNGDUK;AHN, KOOKYOUNG
    • Transactions of the Korean hydrogen and new energy society
    • /
    • v.32 no.3
    • /
    • pp.149-155
    • /
    • 2021
  • Most of the reformer experiments have been conducted only in high-temperature operation conditions above 700℃. However, to design high efficiency solid oxide fuel cell, it is necessary to test actual reaction performance in mid-temperature (550℃) operation areas. In order to study the operation characteristics and performance of commercial reforming catalysts, a reforming performance experiment was conducted on mid-temperature. The catalysts used in this study are Ni-based FCR-4 and Ru-based RuA, RuAL. Experiments were conducted with a Steam-to-carbon ratio of 2.0 to 3.0 under gas hourly space velocity (GHSV) 2,000 to 5,000 hr-1. As a result, RuA and RuAL catalysts showed similar gas composition to the equilibrium regardless of the reforming temperature. However, the FCR-4 catalyst showed a lower hydrogen yield compared to the equilibrium under high GHSV conditions.

Effects of Sensor Errors in Air Cleaner Testing on the Cleaner Performance Estimation (공기청정기 시험기의 센서신호 오차가 공기청정기 성능 평가에 미치는 영향)

  • CHUNHWAN LEE;MINYOUNG KIM;SUMIN LEE
    • Transactions of the Korean hydrogen and new energy society
    • /
    • v.34 no.1
    • /
    • pp.77-82
    • /
    • 2023
  • The fuel cell in fuel cell electric vehicle utilizes oxygen in the atmosphere, which requires the use of an air cleaner system to minimize the intake of harmful pollutants. To estimate the performance of the air cleaner system, the pressure drop between the filter inlet and outlet is used under the rated air flow condition. In this study, the effect of sensor error in this air cleaner testing is experimentally carried out. It is found that the errors of the temperature sensor does not significantly affect the estimation of pressure drop. However, in the case of the pressure sensor, 5% sensor error results in the error of pressure drop estimation by 3%. Therefore, it is recommended that the measurement accuracy of the pressure sensor mounted in test system should be maintained at less than 5%.

Development of Adsorbents for Removal of Hydrogen Sulfide and Ammonia Using Carbon Black from Pyrolysis of Waste Tires (폐타이어 열분해에 의한 카본블랙을 이용한 황화수소와 암모니아 제거를 위한 흡착제 개발)

  • Seo, Yang-Gon;Kim, Chang-Joon;Kim, Dae Hyeok
    • Clean Technology
    • /
    • v.21 no.2
    • /
    • pp.108-116
    • /
    • 2015
  • Hydrogen sulfide and ammonia are one of the common malodorous compounds that can be found in emissions from many sewages treatment plants and industrial plants. Therefore, removing these harmful gases from emissions is of significance in both life and industry because they can cause health problems to human and detrimental effects on the catalysts. In this work, pyrolytic carbon blacks from waste tires were used to develop adsorbent with good adsorption capacity for removal of hydrogen and ammonia. Pellet-type adsorbents were prepared by a mixture of carbon black, metal oxide and sodium hydroxide or hydrochloric acid, and their adsorption capacities were estimated by using breakthrough curve of a continuous fixed bed adsorption column at ambient condition. The adsorbent manufactured with a mixture of carbon black, iron oxide(III) and sodium hydroxide showed the maximum working capacity of hydrogen sulfide. For ammonia, maximum working capacity was obtained by the adsorbent manufactured with a mixture of carbon black, copper oxide(II) and hydrochloric acid.

Reuse of Hydrogen Sulfide by Ferric Chelate Reaction of Food Waste Anaerobic Digestion Gas, Sulfur Recovery and its Economic Evaluation (킬레이트 착화학반응에 의한 음식물폐기물 혐기소화가스 중 황화수소의 제거와 황회수 및 경제성평가)

  • Park, Young G.;Yang, Youngsun
    • Clean Technology
    • /
    • v.20 no.4
    • /
    • pp.367-374
    • /
    • 2014
  • Several experiments have been done to investigate the removal of hydrogen sulfide ($H_2S$) synthetic gas from biogas streams by means of chemical absorption and chemical reaction with 0.1-1 M Fe/EDTA solution. The roles of Fe/EDTA were studied to enhance the removal efficiency of hydrogen sulfide because of oxidizing by chelate. The motivation of this investigation is first to explore the feasibility of enhancing the toxic gas treatment in the biogas facility. The biogas purification strategy affords many advantages. For instance, the process can be performed under mild environmental conditions and at low temperature, and it removes hydrogen sulfide selectively. The end product of separation is elemental sulfur, which is a stable material that can be easily disposed with minor potential for further pollution. As the Fe-EDTA concentration increased, the conversion rate of hydrogen sulfide increased because of the high stability of Fe-EDTA complex. pH as an important environmental factor was 9.0 for the stability of chemical complex in the oxidation of hydrogen sulfide.

A Study on the Characteristics of Spark Ignition Engine Cleanliness by Low Level Bio-Alcohol Blending (저농도 바이오알코올 혼합에 따른 스파크 점화 엔진 청정 특성 연구)

  • CHA, GYUSOB;NO, SOOYOUNG
    • Transactions of the Korean hydrogen and new energy society
    • /
    • v.30 no.5
    • /
    • pp.428-435
    • /
    • 2019
  • A comparative evaluation of engine cleanliness was performed on the transport gasoline blended with bio- alcohols, and this study was considered to achieve the aim of greenhouse gas reduction in Korea. In particular, the fuel blended with bio-ethanol and bio-butanol showed the best engine cleaning performance both on combustion chamber deposits and intake valve deposits. The deposit control gasoline additive was effective to remove intake valve deposits. In contrast, the amount of combustion chamber deposits were tend to increase even though fuels blended with bio-alcohols were used. In overall, fuels blended with bio-alcohols, compared to fossil fuels, still showed outstanding performance in terms of engine cleanliness.