NH₃ SNCR을 이용한 NOx 제거 : 실험 및 모사

차진선,박영권,박성훈,전종기 한국공업화학회 2011 공업화학 Vol.22 No.4

In this study, effects of temperature, NSR, and oxygen concentration on the NOx removal efficiency of an SNCR process were investigated experimentally as well as numerically using CHEMKIN-II program. The NO removal efficiency increased with the reactor temperature under oxygen-free condition, whereas when the oxygen concentration was 4%, the NO removal efficiency showed a maximum value at 900∼950 ℃. The pressure of oxygen was shown to enhance the NO removal at low temperature. Regardless of the oxygen concentration, the NO removal efficiency increased with NSR. The temperatureand NSR‐dependencies of the NO removal efficiency predicted by CHEMKIN-II simulations were similar to that of the experimental results.

농과 소변에서 분리된 Acinetobacter균의 분포 및 감수성 검사

차진선,오규영 대한임상병리사협회 1985 임상병리사회지 Vol.17 No.1

Reaction Mechanism of Low Temperature NH₃ SCR over MnOx/Sewage Sludge Char

차진선,박영권,박성훈,전종기,Cha, Jin-Sun,Park, Young-Kwon,Park, Sung Hoon,Jeon, Jong-Ki The Korean Society of Industrial and Engineering C 2011 공업화학 Vol.22 No.3

The reaction mechanism of selective catalytic reduction of NOx over sewage sludge char impregnated with MnOx using $NH_3$ as the reducing agent was investigated. The active Mn phase was shown to be $Mn_3O_4$ from the XRD analysis. Adsorption was the dominant NOx removal mechanism at low temperatures below $150^{\circ}C$ although reduction reaction also contributed partly to the NOx removal at $100{\sim}150^{\circ}C$. The reaction rate constants of NOx removal over non-impregnated and MnOx-impregnated active chars were compared based on experimental results. The MnOx-impregnated char was shown to have a higher reaction rate constant and a higher NOx removal efficiency due to a higher collision coefficient and a lower activation energy. The activation energy for both chars was shown to be relatively low (10~12 kJ/mol) under the experimental conditions of this study. 하수슬러지 촤에 MnOx를 담지한 촉매를 사용하여 $NH_3$를 환원제로 하는 선택적 촉매 환원반응의 반응 메커니즘 분석을 수행하였다. XRD 분석 결과 활성 Mn phase는 $Mn_3O_4$인 것으로 여겨졌다. 또한 $150^{\circ}C$ 이하에서는 흡착반응이 주요한 질소산화물 저감 메커니즘으로 작동하였으나, $100{\sim}150^{\circ}C$에서는 환원반응도 질소산화물 저감에 관여하는 것으로 보여졌다. 실험결과에 기초하여 활성 촤와 여기에 MnOx를 담지한 촤에서의 반응속도상수를 비교하였다. MnOx 담지촤는 높은 충돌계수와 낮은 활성화 에너지에 기인하여 높은 반응속도 상수와 높은 NOx 제거 효율을 나타내었다. 두 가지 촤 모두 본 실험 조건하에서 활성화 에너지는 상대적으로 낮았다(10~12 kJ/mol).

1P-503 Vanadium Sublimation from SCR Catalysts for diesel engines

차진선,이연숙,이경미,이진숙,신민철 한국공업화학회 2017 한국공업화학회 연구논문 초록집 Vol.2017 No.1

In 2016, the US-EPA (United States-Environmetal Protection Agency) provided certification guidance of 'Certification of Diesel Engines Equipped with Vanadium-based SCR Catalyst'. For this certification, a system for the vanadium sublimation test was installed and studied at KTL(Korea Testing Laboratory). In this study, vanadium sublimation were investigated with commercial vanadium-based SCR. The vanadium sublimation was perfomed at laboratory scale using a monolith SCR catalyst. Vanadia vapors were adsorbed onto a high surface area alumina capture bed located downstream of the catalyst in the hot zone of the furnace. The effects of temperature(500 ~ 700°C), H₂O concentration (0, 5, 10 vol%), space velocity (10,000 ~ 50,000hr^-1), vanadium contents and NH₃/NO mole ratio on vanadium sublimation were investigated. After each test, alumina and quartz wool samples were mineralized from HNO₃, HF and HCl mixture. The digests were then diluted with high purity water prior to ICP-MS analysis.

NH₃-based SNCR of NO_x : Experimental and Simulation

차진선,박성훈,전종기,박영권,Cha, Jin Sun,Park, Sung Hoon,Jeon, Jong-Ki,Park, Young-Kwon The Korean Society of Industrial and Engineering C 2011 공업화학 Vol.22 No.4

In this study, effects of temperature, NSR, and oxygen concentration on the $NO_x$ removal efficiency of an SNCR process were investigated experimentally as well as numerically using CHEMKIN-II program. The NO removal efficiency increased with the reactor temperature under oxygen-free condition, whereas when the oxygen concentration was 4%, the NO removal efficiency showed a maximum value at $900{\sim}950^{\circ}C$. The pressure of oxygen was shown to enhance the NO removal at low temperature. Regardless of the oxygen concentration, the NO removal efficiency increased with NSR. The temperature and NSR-dependencies of the NO removal efficiency predicted by CHEMKIN-II simulations were similar to that of the experimental results. 본 연구에서는 SNCR 공정에서 온도, NSR, 산소 농도가 질소산화물 제거 효율에 미치는 영향을 실험과 CHEMKIN-II 프로그램을 사용하여 수치적으로 조사하였다. 산소가 없는 조건에서 NO 제거 효율은 반응기 온도에 따라 증가하였다. 반면 산소농도가 4%일 때, NO 제거 효율은 $900{\sim}950^{\circ}C$에서 최대를 나타내었다. 산소의 존재는 저온에서 NO 제거를 증가시키는 것으로 나타났다. 산소농도와 무관하게 NO 제거 효율은 NSR에 따라 증가하였다. CHEMKIN-II에 의해 예측된 NO 제거 효율의 온도와 NSR-의존성은 실험결과와 유사하였다.

바이오매스 char를 이용한 NO의 선택적 촉매환원

차진선,최종철,박영권 한국대기환경학회 2008 한국대기환경학회 학술대회논문집 Vol.- No.-

Corrosion behavior of carbon steel in the CO2 absorption process using AMP solutions

차진선,홍성은,신민철,송준광 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0

CO2 capture in postcombustion is currently the most advanced technology and has been applied to existing plants. In the case of diluted and low-pressure streams, absorption process using aqueous amine-based solutions is the most attractive technology. However, one of the disadvantages of this process was corrosion problems that seemed to occur in regenerators, reboiler and rich-lean heat exchangers. This study provides the effect of process parameter on the corrosion behavior of carbon steel in CO2 absorption system using AMP solutions. Corrosion was experimentally evaluated using electrochemical techniques. The test parameters were concentration of the AMP solution, solution temperature, CO2 loading and oxygen contents. The experimental results showed that the corrosion behavior was considerably sensitive to the parameters. Increased AMP concentration, AMP solution temperature, CO2 loading and oxygen content accelerated the corrosion rate. In addition, effect of corrosion inhibitor was investigated under same conditions.

Production and utilization of biochar: A review

차진선,박성훈,정상철,류창국,전종기,신민철,박영권 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.40 No.-

Biochar produced during the thermochemical decomposition of biomass not only reduces the amount ofcarbon emitted into the atmosphere, but it is also an environment-friendly replacement for activatedcarbon and other carbon materials. In this review paper, researches on biochar are discussed in terms ofproduction method and application. Different processes for biochar production, such as pyrolysis,gasification, hydrothermal carbonization, etc., are compared. Physical and chemical activation methodsused to improve the physicochemical properties of biochar and their effects are also compared. Variousenvironmental application fields of biochar including adsorption (for water pollutants and for airpollutants), catalysis (for syngas upgrading, for biodiesel production, and for air pollutant treatment),and soil conditioning are discussed. Recent research trend of biochar in other applications, such as fuelcell, supercapacitor, and hydrogen storage, is also reviewed.

Regeneration of SCR catalysts deactivated by inorganic elements

차진선,이재훈,이경미,신민철 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.1

Various physical and chemical treatment were studied to recycled the deactivated SCR catalysts that will used as raw materials for SCR catalyst re-preparation. For removal of clogging materials, physical treatment was carried out using air washing, H₂O washing, ultrasonic, air washing&ultrasonic. While chemical treatment was performed through acid(HCl, HNO₃, H₂SO₄ and organic acids) and base solution (NaOH, NH₄OH) for recovery of precious metals(V, W)/TiO₂ by removing the poisoned materials. Several solutions were applied to optimized the recovery process and recovered precious metals(V, W)/TiO₂ were characterized as the N₂ adsorption-desorption, X-ray fluorescence (XRF), X-ray diffraction(XRD), scanning electron microscopy(SEM) and deNOx conversion.

Study on the test method of NOx and SOx removal performance of photocatalyst

차진선,신현규 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1

Fine dust is air pollution caused by fine particulate matters, categorized as fine dust less than 10 μm(PM 10) in diameter, and ultrafine dust less than 2.5 μm(PM 2.5) diameter. According to '미세먼지 종합 관리대책', domestic fine dust are emitted by direct emission about 30%, while about 70% is indirectly emitted by reacted with NOx, SOx and VOCs in the atmosphere. In order to reduce such a fine dust and precursor, evaluation tests of photocatalyst raw material or related manufacturers have been rapidly increased. ISO standard offers several test methods for evaluating the performance of photocatalysts. But this standard does not apply to powder photocatalytic materials, and then, it is necessary to study a test method to evaluate them. In addition, there is no standard for SO₂ removal performance test, which is a fine dust precursor. In this study, the test method of powder photocatalytic materials and SO₂ removal performance test were conducted based on ISO test standard.