http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
금속염화물이 담지된 V<sub>2</sub>O<sub>5</sub>-WO<sub>3</sub>/TiO<sub>2</sub> 계 SCR 촉매에 의한 수은 및 NO 동시 제거
함성원,Ham, Sung-Won 한국청정기술학회 2017 청정기술 Vol.23 No.2
HCl에 의한 원소수은의 염화수은으로의 산화반응에 대한 열역학적 검토 결과 수십 ppm 수준의 HCl이 존재하는 경우에 SCR 반응 온도범위에서 원소수은의 염화수은으로의 전환은 100% 가능한 것으로 확인하였다. SCR공정 운전 온도범위에서 Cu, Fe, Mn의 염화물이 담지된 $V_2O_5-WO_3/TiO_2$ 촉매가 우수한 NO 제거 활성을 보였다. $NH_3-TPD$ 측정결과 $NH_3$의 흡착강도를 나타내는 탈착온도가 높은 촉매가 우수한 NO 제거활성을 나타내었다. 반응가스에 HCl을 공급할 경우 원소수은의 산화반응이 촉진되는 결과를 얻을 수 있었다. 그러나, NO와 함께 $NH_3$가 존재하는 SCR반응 조건에서는 촉매표면에 강하게 흡착되는 $NH_3$에 의해 촉매표면에 HCl의 흡착이 방해를 받기 때문에 HCl에 의한 원소수은의 염화수은으로의 산화반응 활성이 억제되는 것으로 나타났다. SCR반응 조건에서 금속염화물이 담지된 $V_2O_5-WO_3/TiO_2$ 촉매가 금속염화물이 담지되지 않은 $V_2O_5-WO_3/TiO_2$ 촉매에 비해 우수한 수은 산화활성을 보이는데 이는 촉매 표면에 존재하는 금속염화물의 염소기가 수은 산화반응에 참여하여 활성을 증가시키기 때문으로 판단된다. Thermodynamic evaluation indicates that nearly 100% conversion of elemental mercury to oxidized mercury can be attained by HCl of several tens of ppm level at the temperature window of SCR reaction. Cu-, Fe-, Mn-chloride loaded $V_2O_5-WO_3/TiO_2$ catalysts revealed good NO removal activity at the operating temperature window of SCR process. The catalysts with high desorption temperature indicating adsorption strength of $NH_3$ revealed higher NO removal activity. The HCl fed to the reaction gases promoted the oxidation of mercury. However, the activity for the oxidation of elemental mercury to oxidized mercury by HCl was suppressed by $NH_3$ inhibiting the adsorption of HCl to catalyst surface under SCR reaction condition containing $NH_3$ for NO removal. Metal chloride loaded $V_2O_5-WO_3/TiO_2$ catalysts showed much higher activity for mercury oxidation than $V_2O_5-WO_3/TiO_2$ catalyst without metal chloride under SCR reaction condition. This is primarily attributed to the participation of chloride in metal chloride on the catalyst surface promoting the oxidation of elemental mercury.
생물화공 에너지 / 환경 : 저온 플라즈마를 이용한 질소산화물 제거
함성원(Sung Won Ham),박헌휘(Hun Hwee Park),목영선(Young Sun Mok) 한국화학공학회 1999 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.37 No.5
The removal of nitric oxide by a pulsed corona discharge process was investigated. As an energy saving technique, the addition of hydrocarbons such as ethylene and propylene to flue gas was examined, and the scheme for the oxidation of NO facilitated by hydrocarbon was discussed. Compared to ethylene known as the most powerful additive, propylene gave much better performance in the conversion of NO. From the theoretical and experimental analyses performed to find out active component dominantly affecting the oxidation of NO, ozone was found to play a major role in the oxidation of NO. It indicates that the removal of NO is also possible by injecting ozone to flue gas as well as by inducing corona discharge. The possibility for the removal of NO using ozone was experimentally proved. Maximum energy utilization efficiency for the removal of nitric oxide was obtained when the pulse-forming capacitance in the pulse voltage generator was five times larger than the geometric capacitance of the corona reactor.
Parallel Passage Reactor ( PPR ) 를 이용한 NOx의 선택적 제거
최훈,함성원,남인식,김영걸,심재호,하백현 ( Hoon Choi,Sung Won Ham,In Sik Nam,Young Gul Kim,Jae Ho Sim,Baik Hyon Ha ) 한국화학공학회 1996 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.34 No.1
PPR(Parallel Passage Reactor) design for the SCR of NO_χ from stationary sources using NH₃ as a reductant was investigated. The effect of process variables such as catalyst composition, adhesive, catalyst size, reactor length, flow rate and reactor gap size was examined on the catalytic activity. About 90% of NO conversion was achieved for both natural and synthetic zeolites containing cupric ions. Heat-resisting paint(Korea Chemical Co.) used as an adhesive, showed good adhesion even under high reaction temperature up to 450℃. A mathematical model derived in this study well describes experimental observations, and a simple methodology deducing the results of PPR from the experimental results of packed bed reactor was presented.