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Jun, Hee Kwon,Jung, Suk Yong,Lee, Tae Jin,Kim, Jae Chang 한국화학공학회 2004 Korean Journal of Chemical Engineering Vol.21 No.2
The sulfur removing capacities of various Zn-Ti-based sorbents were investigated in the presence of H₂O and HCl at high-(sulfidation, 650℃; regeneration, 800℃)and medium-(sulfidation, 480℃; regeneration, 580℃)temperature conditions. The H₂O effect of all sorbents was not observed at high-temperature conditions. At medium-temperature conditions, the reaction rate of ZT(Zn/Ti:1.5)sorbent decreased with the level of H₂O concentration, while modified (ZTC, ZTN) sorbents were not affected by the water vapor. HCl vapor resulted in the deactivation of ZT sorbent with a cycle number at high-temperature due to the production of ZnCI₂ while the sulfur removing capacities of ZTC and ZTN sorbents were maintained during 4-5 cyclic tests. In the case of medium-temperature conditions, ZT sorbent was poisoned by HCl vapor while cobalt and nickel added to ZT sorbent played an important catalytic role to prevent from being poisoned by HCl due to providing heat, emitted when these additives quickly react with H₂S even at medium-temperature condition, to the sorbents.
김재창,이태진,정석용,Hee Kwon Jun 한국화학공학회 2004 Korean Journal of Chemical Engineering Vol.21 No.2
The sulfur removing capacities of various Zn-Ti-based sorbents were investigated in the presence of H2O and HCl at high-(sulfidation, 650 oC; regeneration, 800 oC) and medium-(sulfidation, 480 oC; regeneration, 580 oC) temperature conditions. The H2O effect of all sorbents was not observed at high-temperature conditions. At mediumtemperature conditions, the reaction rate of ZT (Zn/Ti : 1.5) sorbent decreased with the level of H2O concentration, while modified (ZTC, ZTN) sorbents were not affected by the water vapor. HCl vapor resulted in the deactivation of ZT sorbent with a cycle number at high-temperature due to the production of ZnCl2 while the sulfur removing capacities of ZTC and ZTN sorbents were maintained during 4-5 cyclic tests. In the case of medium-temperature conditions, ZT sorbent was poisoned by HCl vapor while cobalt and nickel added to ZT sorbent played an important catalytic role to prevent from being poisoned by HCl due to providing heat, emitted when these additives quickly react with H2S even at medium-temperature conditions, to the sorbents.
실험실규모 고온고압건식탈황공정의 수력학적 특성 및 탈황온도에 따른 아연계 탈황제의 반응특성 연구
경대현 ( Dae Hyun Kyung ),김재영 ( Jae Young Kim ),조성호 ( Sung Ho Jo ),박영철 ( Young Cheol Park ),문종호 ( Jong Ho Moon ),이창근 ( Chang Keun Yi ),백점인 ( Jeom In Baek ) 한국화학공학회 2012 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.50 No.3
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˚C and 550˚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 H2S removal efficiency tended to decrease below the desulfurization temperature of 450˚C. Thus, the 10 hour continuous operation has been performed at the desulfurization temperature of 500˚C in order to maintain the high H2S removal efficiency. During 10 hour continuous operation, the H2S removal efficiency was above 99.99% because the H2S concentration after desulfurization was not detected at the inlet H2S concentration of 5,000 ppmv condition using UV analyzers (Radas2) and the detector tube (GASTEC) which lower detection limit is 1ppmv.
석탄가스화기, F-T 공정, 건식탈황공정이 통합된 0.3 배럴/일 규모 석탄액화(CTL) 공정에서 고온, 고압 연속운전에서 아연계 탈황제의 탈황 성능 파악
박영철(Park, Young Cheol),조성호(Jo, Sung-Ho),진경태(Jin, Gyoung Tae),이승용(Lee, Seung-Yong),이창근(Yi, Chang-Keun) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.06
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.
석탄가스에 함유된 H₂O/H₂S 농도가 유동층반응기에서 아연계건식탈황제의 성능에 미치는 영향
박영철(Park, Young-Cheol),조성호(Jo, ung-Ho),진경태(Jin, Gyoung-Tae),이승용(Lee, Seung-Yong),이창근(Yi, Chang-Keun) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.06
본 연구에서는 석탄가스에 함유된 H₂O/H₂S 농도변화에 따른 세가지 종류의 아연계 탈황제의 반응성능을 회분식 유동층반응기에서 분석하였다. 가스화에서 생성되는 가스의 조성은 모사가스를 이용하여 입구의 H₂O와 H₂S 농도를 변화시켜 실험을 수행하였다. H₂O의 농도는 5%부터 30%까지 H₂S의 농도는 0.5%에서 2%로 변화시켜 탈황성능을 분석하였다. 실험 결과 H₂O의 농도가 증가할수록 탈황성능이 감소하였다. 입구의 H₂S 농도가 증가할수록 탈황반응기 후단의 H₂S 농도 역시 증가하였으나, 탈황성능은 최저 99.5%로 건식탈황제를 이용하여 99% 이상의 H₂S 제거 성능을 보이는 것을 확인하였다.