• Title/Summary/Keyword: 고온탈황

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The Operation of a Hot Gas Desulfurization Process with Gasifier (고온건식탈황과 가스화로의 연계실험)

  • 조성호;윤용승;류청걸;박태준;한문희;이창근
    • Proceedings of the Korea Society for Energy Engineering kosee Conference
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    • 2003.05a
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    • pp.497-502
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    • 2003
  • 청정석탄이용기술개발의(CCT : Clean Coal Technology) 일환으로 차세대 발전방식으로 유력시되고 있는 기술인 석탄가스화발전기술(IGCC), 석탄가스화 연료전지(IGFC)등에서 고온건식탈황은 필수요소기술이다. 고온건식탈황기술의 핵심기술은 탈황제개발고 공정기술개발로 나누어 볼 수 있다. 탈황제개발은 국내고유 탈황제개발 연구가 진행 중에 있고 유동층과 고속유동층에 적합한 탈황제를 kg단위로 성형하여 공정개발에서 반응특성 실험을 하였다.(중략)

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Study on desulfurization performance of Zn-based solid sorbents at high temperature and pressure in the 0.3 bbl/d CTL(Coal-to-Liquid) process integrated with coal gasifier, F-T process and hot gas desulfurization process (석탄가스화기, F-T 공정, 건식탈황공정이 통합된 0.3 배럴/일 규모 석탄액화(CTL) 공정에서 고온, 고압 연속운전에서 아연계 탈황제의 탈황 성능 파악)

  • Park, Young Cheol;Jo, Sung-Ho;Jin, Gyoung Tae;Lee, Seung-Yong;Yi, Chang-Keun
    • 한국신재생에너지학회:학술대회논문집
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    • 2010.06a
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    • pp.107.2-107.2
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    • 2010
  • 고온건식탈황기술은 고온고압에서 석탄가스에 함유된 황화합물을 제거하는 기술로 석탄가스화에 의해 생성된 고온의 석탄가스의 열손실을 최소화하여 열효율이 높은 기술이다. 본 연구에서는 석탄으로부터 합성원유를 생산하는 0.3 배럴/일 규모 석탄액화(CTL)공정의 연계운전을 통하여 건식탈황공정의 성능을 평가하였다. 0.3 배럴/일 규모 석탄액화공정은 석탄가스화기, 건식탈황공정, 액화공정으로 구성되어 있으며 30 atm의 고압에서 운전된다. 건식탈황공정은 석탄가스화기와 액화공정 사이에 위치하여 석탄가스화로부터 생성된 석탄가스에 함유된 황화합물을 아연계 건식탈황제에 의해 제거한 후 액화반응기로 공급하여 황화합물에 의한 촉매의 피독을 막아주는 역할을 수행한다. 본 연구에서는 기존에 개발된 두 개의 기포유동층 반응기로 구성된 탈황장치를 30 atm에서 운전이 가능하도록 수정/보완하여 실제 운전압력인 30 atm의 고압에서 연속운전을 수행하였다. 실험 결과 탈황효율은 99% 이상이며 탈황반응기 출구 황화합물의 농도는 1 ppmv 이하로 유지하였다.

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Trends in Research and Technical Development of Sorbents for Hot Gas Desulfurization for H2S Removal (H2S 제거를 위한 고온건식 탈황제의 연구 및 기술개발동향)

  • Seo, Jun-Hyung;Baek, Chul-Seoung;Kwon, Woo Tech;Ahn, Ji-Whan;Cho, Kye-Hong
    • Resources Recycling
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    • v.25 no.5
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    • pp.14-27
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    • 2016
  • Theoretical reviews of integrated gasification combined cycle one of the clean coal technologies and trends in the study and technology development for high temperature desulfurization sorbents were investigated. Reactivity, durability and abrasion resistance is an important key for development of high temperature desulfurization sorbents, the kind of things include calcium, zinc, manganese, iron and copper-based sorbents. Current status of high temperature desulfurization sorbents, manufacturing techniques of zinc-based sorbent in advanced countries has commercialized. In case of Korea, various research studies are underway to commercialize the Zn and non Zn-based high temperature desulfurization sorbents to cheaper and superior capability using various supports.

Regeneration of Zinc Titanate Used for High Temperature Desulfurization of Fuel Gases (연료가스의 고온 탈황에 사용된 Zinc Titanate의 재생)

  • 이태진;권원태
    • Journal of Energy Engineering
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    • v.7 no.1
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    • pp.73-80
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    • 1998
  • Zinc titanate sorbents were prepared and regeneration of used sorbents for high temperature desulfurization of fuel gases was studied. Zn/Ti molar ratio of prepared sorbents was 1.5 and quartz fixed-bed reactors with 1 cm and 3 cm diameters were used. Regeneration of zinc titanate sorbents at high temperature is exothermic reaction; that brings about deterioration of sorbents. Therefore, we experimented regeneration reaction of zinc titanate sorbents for the purpose of obtaining the most suitable regeneration conditions by changing experimental parameters such as reaction temperature, oxygen concentration, flow rate and steam content. $H_2S$ and $SO_2$ breakthrough curves were obtained during desulfurization-regeneration. Also, properties of the sorbents before and after regeneration were analyzed using SEM, XRD, Hg-porosimetry and BET method. From such results, we obtained the most suitable regeneration conditions including regeneration temperature of 650$^{\circ}$C, $O_2$ content of 5% and steam content of 10% in the gas stream.

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Characteristics of Zinc Based Sorbents for IGCC (석탄가스용 아연계 탈황제의 특성)

  • 위영호;이중범;류청걸
    • Proceedings of the Korea Society for Energy Engineering kosee Conference
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    • 1999.05a
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    • pp.33-38
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    • 1999
  • CCT(Clean Coal Technology)의 응용분야인 IGCC, PFBC 및 MCFC 등 석탄을 이용한 새로운 발전기술에 활용될 것으로 예견되는 고온건식 탈황기술은 고온(35$0^{\circ}C$~$650^{\circ}C$)과 고압(약 20기압)상태에서 금속 산화물로 된 고체흡수제(고온건식 탈황제)를 이용하여 반응기(유동층, 고속유동층 및 고정층과 이동층 반응기 등)에서 흡수와 재생반응을 통하여 석탄가스중에 있는 H$_2$S 등 황화물을 효율적으로 제거하는 기술이다.(중략)

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Desulfurization of hot syngas using zinc oxide sorbent (산화아연을 이용한 고온 탈황 실험)

  • Jung, Kijin;Yoo, Youngdon;Kim, Narang;Kim, Mun-Hyeon;Kim, Jeongheon;Kim, Byunghwan
    • 한국신재생에너지학회:학술대회논문집
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    • 2011.11a
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    • pp.177.2-177.2
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    • 2011
  • 폐기물 합성가스에 포함되어 있는 오염물질 중 황화합물($H_2S$, COS)이 존재할 경우, 다른 연계 공정을 구성하는 설비의 부식, 합성가스 이용 공정의 촉매 피독 문제, 대기 배출시 환경오염 문제 등을 야기 시키므로 제거가 필요하다. 고온 정제 공정을 적용하여 황화합물을 제거하기위해 산화아연을 이용한 고온 탈황 실험을 수행하였다. 고정층 반응기에 탈황제로 선정한 산화아연을 충진하고, 공간속도 $3,000h^{-1}$, 입구 황화합물의 농도 $H_2S$ 1,000ppm, COS 300ppm일 때 반응 온도 변화에 따른 탈황특성을 살펴보았다. 가스 내부에 $H_2S$가 단독으로 존재할 경우에는 $400^{\circ}C$ 이상에서 모두 제거되었으나, $H_2S$와 COS가 동시에 존재할 경우에는 $450^{\circ}C$ 이상에서 모두 제거되는 것을 알 수 있었다. 반응온도 $500^{\circ}C$에서 산화아연 탈황제를 이용한 실험결과 $H_2S$, COS의 파과시간은 각각 1,217, 1,063 min, 흡착능력은 269.9 mg-$H_2S$/g-sorbent, 124.7 mg-COS/g-sorbent으로 파악되었다.

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Cu/ZnO sorbents for the hydrogen station (수소스테이션을 위한 Cu/ZnO 계 탈황제)

  • Jun, ki-Won;Bae, Jong-Wook;Kang, Suk-Hwan;Yoon, Young-Seek;Kim, Myung-Jun
    • 한국신재생에너지학회:학술대회논문집
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    • 2006.11a
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    • pp.344-347
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    • 2006
  • 탄화수소 연료(LNG, LPG)를 개질하여 수소를 제조하는 연료 처리 공정 중, 탈황 기술은 촉매의 활성저하 및 전극의 피독을 방지하기 위한 필수 기술이다. 본 연구에서는 도시가스 및 액화석유 가스용 부취제로 사용되는 유기 황화합물(,DMS, THT, TBM)을 제거하기 위한 탈황제로서 Cu/ZnO계 흡착제를 개발하였다. 공침법을 이용하여 흡착제를 제조하여 각 부취제별로 상온 및 고온에서의 흡착탈황 성능을 조사하였으며 또한, 이의 특성분석을 행하였다. $Cu/ZnO/Al_2O_3$ 탈황제는 메탄으로부터 고온에서 TH, DMS, TBM+THT 등의 황화합물들을 매우 효과적으로 제거할 수 있었다. 특히, TBM+THT의 혼합가스에서 TBM에 대해 선택적인 흡착을 보였다. THT 흡착에서 흡착온도가 $300^{\circ}C$ 이상에서는, 흡착과정 동안 황의 상호작용으로 인해 금속황화물이 생성되었다.

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Degradation of Dibenzothiophene, and Desulfurization of Crude Oil and Bunker C Oil by Sulfate Reducing Bacteria (황산염 환원세균에 의한 Dibenzothiophene, 원유 및 Bunker C 유의 탈황)

  • 김해영;김태성;김병홍
    • Microbiology and Biotechnology Letters
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    • v.18 no.1
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    • pp.31-34
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    • 1990
  • Dibenzothiophene, crude oil and bunker C oil were used in the microbial desulfurization experiments using thermophilic and mesophilic strains of Desulfovibrio and Desulfotomaculum. Mesophilic Desulforvibrio desulfuricans M6 showed the degrees of sulfur removal about 42% and 17% from dibenzothiophene and crude oil, respectively. Thermophilic Desulfovibrio thermophilus showed the degrees of sulfur removal about 68% and 33% from dibenzothiophene and bunker C oil. The strains of Desulfotomaculum were much less efficient than strains of Desulfovibrio. The latter have more complex and stronger gydrogen metabolism. These results showed that desulfurization is closely related to the hydrogen metabolism of the sulfate reducing bacteria.

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A Study of Hydrodynamics and Reaction Characteristics in Relation to the Desulfurization Temperatures of Zn-Based Solid Sorbent in the Lab-scale High Pressure and High Temperature Desulfurization Process (실험실규모 고온고압건식탈황공정의 수력학적 특성 및 탈황온도에 따른 아연계 탈황제의 반응특성 연구)

  • Kyung, Dae-Hyun;Kim, Jae-Young;Jo, Sung-Ho;Park, Young Cheol;Moon, Jong-Ho;Yi, Chang-Keun;Baek, Jeom-In
    • Korean Chemical Engineering Research
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    • v.50 no.3
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    • pp.492-498
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    • 2012
  • In this study, hydrodynamics such as solid circulation rate and voidage in the desulfurizer and the reaction characteristics of Zn-based solid sorbents were investigated using lab-scale high pressure and high temperature desulfurization process. The continuous HGD (Hot Gas Desulfurization) process consist of a fast fluidized bed type desulfurizer (6.2 m tall pipe of 0.015 m i.d), a bubbling fluidized bed type regenerator (1.6 m tall bed of 0.053 m i.d), a loop-seal and the pressure control valves. The solid circulation rate was measured by varying the slide-gate opening positions, the gas velocities and temperatures of the desulfurizer and the voidage in the desulfurizer was derived by the same way. At the same gas velocities and the same opening positions of the slide gate, the solid circulation rate, which was similar at the temperature of $300^{\circ}C$ and $550^{\circ}C$, was low at those temperatures compared with a room temperature. The voidage in the desulfurizer showed a fast fluidized bed type when the opening positions of the slide gate were 10~20% while that showed a turbulent fluidized bed type when those of slide gate were 30~40%. The reaction characteristics of Zn-based solid sorbent were investigated by different desulfurization temperatures at 20 atm in the continuous operation. The $H_2S$ removal efficiency tended to decrease below the desulfurization temperature of $450^{\circ}C$. Thus, the 10 hour continuous operation has been performed at the desulfurization temperature of $500^{\circ}C$ in order to maintain the high $H_2S$ removal efficiency. During 10 hour continuous operation, the $H_2S$ removal efficiency was above 99.99% because the $H_2S$ concentration after desulfurization was not detected at the inlet $H_2S$ concentration of 5,000 ppmv condition using UV analyzers (Radas2) and the detector tube (GASTEC) which lower detection limit is 1 ppmv.

A Review of Desulfurization Technology using Limestone in Circulating Fluidized Bed Boiler Type Power Plant (유동층보일러형 화력발전소의 석회석 활용 탈황기술 연구동향)

  • Baek, Chul-Seoung;Seo, Jun-Hoyung;Ahn, Ji-Whan;Han, Chon;Cho, Kae-Hong
    • Resources Recycling
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    • v.24 no.5
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    • pp.3-14
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    • 2015
  • This study investigated that status of domestic and international furnace desulfurization and desulfurization characteristics of limestone for fluidized bed use depending on the technology for CFBC one of the CCPs. Limestone-based desulfurizing agent is one of the superior elements which are optimal at around $850-950^{\circ}C$ on high temperature desulfurization. And effectiveness of desulfurization process can be determined by the desulfurization experiment method such as diffusion reaction of the diaphragm of the absorber surface, the size of the particles, the pores of the quantity, size and structure. And, desulfurization efficiency depending on geological and crystallographic properties and calcination process of limestone needs additional research in the future.