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외부 및 내부 확산을 적용한 인도네시아 석탄촤의 연소 반응율 분석
황찬원 ( Chan Won Hwang ),김량균 ( Ryang Gyoon Kim ),류광일 ( Kwang Il Ryu ),오택림 ( Ze Lin Wu ),전충환 ( Chung Hwan Jeon ) 한국화학공학회 2014 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.52 No.1
The experiment was designed to compare the char combustion kinetics of pulverized Indonesia coals commonly utilized in Korea power plants. The reaction rate of coal char has been formulated using the external and internal effectiveness factors to describe the diffusion effect quantitatively. The Random Pore Model (RPM) was used for applying internal specific surface area as a function of carbon conversion ratio. Reaction rate was obtained from reaction time using the Wire Heating Reactor (WHR) which can heat and measure the char particle temperature at the same time. BET and TGA were used to obtain physical properties such as internal specific surface area and structural parameter. Three kinds of Indonesia Sub-bituminous coals BARAMULTI, ENERGYMAN, AGM were used in order to derive the activation energy and pre-exponential factor. The results of this study showed that the effect of internal diffusion than that of external diffusion is the dominant as comparison of kinetics was reflected in external and internal effectiveness factors. For three kinds of coal char, finally, activation energy of intrinsic kinetics indicates 110~118 kJ/mol.
고온, 고압조건에서의 인도네시아 석탄촤의 CO<sub>2</sub> 가스화 반응
리산디케빈요하네스,김량균,황찬원,전충환,Lisandy, Kevin Yohanes,Kim, Ryang-Gyoon,Hwang, Chan-Won,Jeon, Chung-Hwan 대한기계학회 2014 大韓機械學會論文集B Vol.38 No.9
A pressurized wire mesh heating reactor (PWMR) can provide high pressure and temperature experimental conditions up to 50 atm and 1750 K, respectively. This equipment was developed to evaluate the intrinsic reaction kinetics of $CO_2$ gasification. A PWMR utilizes a platinum (Pt) wire mesh resistance to generate heat with a direct current (DC) electricity supply. This DC power supply can then be controlled by computer software to reach the exact expected terminal temperature and heating period. In this study, BERAU (sub-bituminous Indonesian coal) was pulverized then converted into char with a particle size of $90-150{\mu}m$. This was used in experiments with various pressures (1-40 atm) and temperatures (1373-1673 K) under atmospheric conditions. The internal and external effectiveness factor was analyzed to determine the effects of high pressure. The intrinsic reaction kinetics of BERAU char was obtained using $n^{th}$ order reaction rate equations. The value was determined to be 203.8kJ/mol. PWMR(Pressurized wire mesh heating reactor)는 Intrinsic $CO_2$ 가스화 반응속도 해석에 필요한 활성화에너지와 빈도상수를 도줄하기 위해서 고안되었으며, 고압 및 고온(50atm, 1750K)조건 하에서 실험을 수행하였다. 본 연구에서는 고온조건에서의 실험을 위해 백금(Pt) 메쉬를 가열체로 사용하였고 직류전원공급기를 통해 백금메쉬로 전류를 인가하여 석탄 입자를 가열시킨다. 가열시 정확한 온도제어 및 반응시간 조절을 위해 직류전원공급기는 컴퓨터로 제어된다. 본 연구에서는, 인도네시아 아역청탄인 BERAU 를 사용하였으며 입자크기는 $90-150{\mu}m$, 압력과 온도조건은 각각 1-40atm 및 1373-1673K에서 실험을 진행하였다. 고압에서의 압력의 영향을 구분하기 위해 Internal/external effectiveness factor를 고려하였다. 최종적으로 BERAU 촤의 Intrinsic 가스화 반응속도론 을 $n^{th}$ order 반응식을 통해 도출하였으며 그 값은 203.8kJ/mol 의 값을 가졌다.
김재광(Jae-Kwang Kim),황찬원(Chan Won Hwang),박진호(Jin-Ho Park),김지영(Ji Young Kim),오조교(Jo-Kyo Oh) 한국환경보건학회 2018 한국환경보건학회지 Vol.44 No.4
Objectives: The purpose of this study is to investigate the water quality of 16 golf course ponds located in northern areas Gyeonggi province by investigating residual pesticides, organic matters (BOD, TOC) and nutrients (TN, TP). Methods: The result data for the residual pesticides were used from 2014 to 2017. and other result data were used for April and July in 2017. The residual pesticides analytical method was based on ‘Golf course residual pesticides inspection method’, The others analytical method was based on ‘The water pollution process test standard’ Results: Very toxic pesticides and banned pesticides were not detected but general pesticides were detected. In case of the water quality of the golf course pond was applied to the lake water quality standard. In April the average TOC concentration was V grade to 6.46 mg/L, TP V grade to 0.13 mg/L, TN VI grade to 1.6 mg/L, In July TOC average concentration was VI grade to 8.65 mg/L, TP VI grade to 0.17 mg/L, TN V to 1.5 mg/ L. All TN and TP concentrations corresponded to eutrophication. Compared with lake water quality monitoring, the concentrations of BOD, TOC and TP were high but the TN concentration was low in April and July. Conclusions: It is considered that water quality managements are necessary for the golf course pond. The first reason is that the pollutants of pond are discarded to river during rainfall and act as pollution sources. The second reason is that the golf course users are uncomfortable because of odor caused by the pollutants of the pond.
Kevin Yohanes Lisandy(케빈),Ryang-Gyoon Kim(김량균),Chan-Won Hwang(황찬원),Yeon-Kyung Lee(이연경),Chung-Hwan Jeon(전충환) 대한기계학회 2014 대한기계학회 춘추학술대회 Vol.2014 No.5
Pressurized wire mesh heating reactor (PWMR) can provide high pressure and temperature experimental conditions up to 50 bar and 1750 K respectively. This equipment was developed to evaluate intrinsic reaction kinetics of CO2 gasification. PWMR utilize platinum (Pt) wire mesh resistance to generate heat with direct current (DC) electricity supply. This DC power supply then can be controlled by computer software to reach exact expected terminal temperature as well as heating period. In this study, Berau (sub-bituminous Indonesian coal) was pulverized then converted into char which has 90-150 micrometers particle size experimented with variable pressure condition (1-40 bar) and variable temperature (1373-1673 K) on atmospheric condition. The internal/external effectiveness factor was analyzed to determine the effects of high pressure The intrinsic reaction kinetics of Berau char was obtained using nth order reaction rate equations. The value was determined to be 203.8kJ/mol.
고온, 고압조건에서의 인도네시아 석탄촤의 CO₂ 가스화 반응
리산디케빈요하네스(Kevin Yohanes Lisandy),김량균(Ryang-Gyoon Kim),황찬원(Chan-Won Hwang),전충환(Chung-Hwan Jeon) 대한기계학회 2014 大韓機械學會論文集B Vol.38 No.9
PWMR(Pressurized wire mesh heating reactor)는 Intrinsic CO₂ 가스화 반응속도 해석에 필요한 활성화에너지와 빈도상수를 도줄하기 위해서 고안되었으며, 고압 및 고온(50atm, 1750K)조건 하에서 실험을 수행하였다. 본 연구에서는 고온조건에서의 실험을 위해 백금(Pt) 메쉬를 가열체로 사용하였고 직류전원공급기를 통해 백금메쉬로 전류를 인가하여 석탄 입자를 가열시킨다. 가열시 정확한 온도제어 및 반응시간 조절을 위해 직류전원공급기는 컴퓨터로 제어된다. 본 연구에서는, 인도네시아 아역청탄인 BERAU 를 사용하였으며 입자크기는 90-150 μm, 압력과 온도조건은 각각 1-40atm 및 1373-1673K 에서 실험을 진행하였다. 고압에서의 압력의 영향을 구분하기 위해 Internal/external effectiveness factor 를 고려하였다. 최종적으로 BERAU 촤의 Intrinsic 가스화 반응속도론 을 n<SUP>th</SUP> order 반응식을 통해 도출하였으며 그 값은 203.8kJ/mol 의 값을 가졌다. A pressurized wire mesh heating reactor (PWMR) can provide high pressure and temperature experimental conditions up to 50 atm and 1750 K, respectively. This equipment was developed to evaluate the intrinsic reaction kinetics of CO₂ gasification. A PWMR utilizes a platinum (Pt) wire mesh resistance to generate heat with a direct current (DC) electricity supply. This DC power supply can then be controlled by computer software to reach the exact expected terminal temperature and heating period. In this study, BERAU (sub-bituminous Indonesian coal) was pulverized then converted into char with a particle size of 90-150 μm. This was used in experiments with various pressures (1-40 atm) and temperatures (1373-1673 K) under atmospheric conditions. The internal and external effectiveness factor was analyzed to determine the effects of high pressure. The intrinsic reaction kinetics of BERAU char was obtained using n<SUP>th</SUP> order reaction rate equations. The value was determined to be 203.8kJ/mol.
분사배출 고도 응집·생물여과 공정을 이용한 하수처리수 중의 TP 및 NOM 제거
장영호 ( Young Ho Jang ),강동한 ( Dong Han Kang ),김극태 ( Keug Tae Kim ),임홍빈 ( Heung Bin Im ),황찬원 ( Chan Won Hwang ),김미정 ( Mi Jung Kim ),신형순 ( Hyung Soon Shin ) 한국물환경학회 2012 한국물환경학회지 Vol.28 No.4
Abstract While the existing sewage treatment facilities are mainly being operated by biological processes, winter-time efficiency improvement and additional phosphorus treatment equipment using chemicals have been required to follow the effluent criteria of TP (0.2, 0.3 and 0.5 mg/L for the zone of I, II and III respectively) and BOD5 (5.0 mg/L) which is intensified from 2012 in Republic of Korea. We made an investigation into actual condition of biological treatment process and calculated the optimal chemical input amount by jar test of supernatant of secondary sedimentation tank to evaluate the process improvement for the intensified criteria. Ejector BAF system for removing TP, BOD5 of sewage effluent was suggested. The concentration of TP from biological process is 0.3-0.8 mg/L, and the input amount of optimal chemical coagulant was above Al/P ratio of 3(1.9 mg/L as Al) to meet the criteria of TP for secondary treatment effluent. From the results of this experiment, the best Al/P ratio for Ejector BAF system was about Al/P ratio of 1, and LV of BAF process for intensified criteria of BOD5 and TP was below 1.97m/hr.