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문지홍(Ji Hong Moon),양원(Won Yang),최영태(Young Tae Choi),이은도(Uen Do Lee),송재헌(Jae Hun Song) 한국연소학회 2010 KOSCOSYMPOSIUM논문집 Vol.- No.41
In this study, performance analysis of a Dual Fluidezed-Bed(DFB) biomass gasification system was conducted. The target system is composed of a bubbling fluidized be gasifier and a circulating fluidized bed combustor. Appropriate heat and mass balances of the two reactors are important for increasing cold gas efficiency and total efficiency of the system. The capacity of gasifier is 15 ton/day and the highest Cold Gas Efficiency(CGE) is 73.11% at ER=0.2
Mancozeb와 Pendimethalin에 의한 CHL Cell의 소핵생성과 세포사멸 여부 규명
문지홍 ( Ji-hong Moon ),전경미 ( Kyongmi Chon ),백민경 ( Min-kyoung Paik ),박경훈 ( Kyung-hun Park ) 한국환경농학회 2018 한국환경농학회 학술대회집 Vol.2018 No.-
Mancozeb is a widely used broad-spectrum fungicide known to be genotoxic and induces tumors in rodents at various sites. Pendimethalin is a member of family dinitroanaline of herbicides. Pendimethalin are well known to be more or less toxic to all living organisms. In this study, we investigated whether mancozeb and pendimethalin induce micronucleus and apoptosis in CHL (Chinese hamster lung) cells through flow-cytometry analysis for high throughput. We identified mancozeb (20, 40, 80 ug/ml) and pendimethalin (5, 10, 20 ug/ml) mediated micronuclei formation and apoptosis in a dose dependent manner. We evaluated an increase of micronuclei formation and apoptosis by flow-cytometry analysis and microscopy analysis. We identified that MMC (mitomycin) induced micronuclei formation as positive control and negative control (DW) has no effect on CHL cells. We demonstrated that mancozeb and pendimethalin may induce micronuclei formation and apoptosis in CHL cells. We also suggest that flow-cytometry analysis could be efficient high-throughput method for quantifying the formation of micronuclei.
과정과 촤 가스화 과정에서 우드칩 연료의 타르발생 특성의 변화
문지홍(Ji Hong Moon),성연경(Yeon Kyung Sung),이정우(Jeung Woo Lee),방병열(Byeong Ryeol Bang),이은도(Uen Do Lee) 한국열환경공학회 2010 한국열환경공학회 학술대회지 Vol.2010 No.춘계
Woodchip, a carbon neutral fuel, is one of the fastest growing renewable energy sources. Among many conversion methods to energy, gasification is the best way in terms of energy efficiency and various options for end use like heat, steam, electronics, gaseous and liquid fuel. In the gasification process of woodchip, tar treatment is very important to avoid any mechanical problems and to increase heating value of product gas. However, tar generation process is not fully understood yet. In this study, we investigated tar generation characteristics of woodchip in devolatization and char gasification process. We found that different kinds of tar was generated in the devolatization and gasification process. The effects of temperature and steam amount are also studied.
바이오매스 가스화발전 vs 직접 연소 후 스팀터빈 발전의 경제성 비교
문지홍(Ji Hong Moon),방병열(Byung Ryeul Bang),이은도(Uen Do Lee),이정우(Jung Woo Lee),황의정(Eui Jeong Hwang) 한국연소학회 2010 KOSCOSYMPOSIUM논문집 Vol.- No.41
Economic feasibility of power generation system of biomass syngas engine and direct combustion of biomass with steam turbine was investigated. Due to the low energy density of biomass, there is a limit in the capacity of biomass power generation plant. In this study, small scale biomass power generation plants ranging from 0.5㎿e to 5㎿e was considered. As a result, syngas engine system using bio-syngas is more economical than steam turbine system at low capacity system. The steam turbine system becomes better than syngas engine if the capacity is over 5MWe.
바이오매스 합성가스를 이용한 엔진 발전 시스템의 경제성 평가
문지홍(Ji Hong Moon),이정우(Jeung Woo Lee),방병열(Byung Ryeul Bang),김세원(Se Won Kim),이은도(Uen Do Lee) 한국열환경공학회 2010 한국열환경공학회 학술대회지 Vol.2010 No.추계
Biomass, a carbon neutral fuel, is one of the fastest growing renewable energy sources. In this study, economic feasibility of small scale power generation system using syngas from biomass has been investigated. Effects of important variables such as capital investment, cost of waste wood, renewable energy certificate(REC), system marginal price(SMP) on the benefit of business have been analyzed. Internal rate of return(IRR) was predicted as 16.90%, which implicates the business is promising based on the assumptions such as SMP of 137 Won/kWh, capital cost of 4.7 billion won, and waste wood price of 30 thousand won. Major factors affecting the benefit of business are as follows; system marginal price, operational rate, capital investment, expenditure of waste wood, certified emission reduction.
축분 가스화를 통한 연료가스 생산 공정의 경제적, 환경적 지속가능성 평가
문지홍 ( Ji Hong Moon ),유경환 ( Kyung Hwan Ryu ) 한국공업화학회 2023 공업화학 Vol.34 No.3
This research evaluates the sustainability of gasifying livestock manure to produce fuel gas from an economic and carbon emission perspective. The entire process, including gasification, fuel gas purification, and pipeline installation to transport the produced fuel gas to the demanding industrial complex, is analyzed for realistic feasibility. The study is conducted using an ASPEN PLUS simulation with experimental data. The results of the economic and CO<sub>2</sub> life cycle assessments confirm that the fuel gas produced from livestock manure is competitive with natural gas despite having a lower calorific value. When used as a fuel with a high hydrogen content, the fuel gas emits less CO<sub>2</sub> per calorific value, making it more environmentally friendly. A scenario analysis is also performed to determine the expected economics, with price competitiveness being influenced by several factors. Although a significant decrease in natural gas prices could reduce the price competitiveness of the proposed process, it can still be supported by government policies. The cash flow analysis also confirms the economic viability of the process.