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Molten metal을 이용한 산성가스 고온습식 정제반응 연구
문지홍(Jihong Moon),방병열(Byungryeul Bang),황정호(Jungho Hwang),이은도(Uendo Lee) 한국연소학회 2015 KOSCOSYMPOSIUM논문집 Vol.2015 No.5
The feasibility of a molten metal as a fluid material to purify gas was investigated. The molten has various advantages such as high thermal conductivity, wide operating range and low viscosity. Tin was selected since its physical characteristics are suitable for the purpose. Acid gases (H₂S, COS, CO₂, etc.) are produced in gasification process and must be removed due to corrosion. In this study, reaction characteristics for acid gas removal using molten metal were investigated by equilibrium calculation and fundamental experiments.
Molten metal 유동층을 이용한 열분해 기초 실험
문지홍(Jihong Moon),전수지(Suji Jeon),황정호(Jungho Hwang),방병열(Byungryeul Bang),이은도(Uendo Lee) 한국연소학회 2014 KOSCOSYMPOSIUM논문집 Vol.2014 No.11
The feasibility of a molten metal as a bed material of a pyrolysis system was investigated. The molten metal has various advantages such as high thermal conductivity, wide operating range and low viscosity. Tin was selected since its physical characteristics are suitable for the purpose. As a results, it was found that pyrolytic oil yield and reaction rate were significantly enhanced with the molten Tin. In addition, oxygen component of the product oil was decreased due to Tin oxidation.
탈휘발 과정과 촤가스화 과정에서 목질계 바이오매스의 타르발생 특성
문지홍(Jihong Moon),이은도(Uendo Lee),류창국(Changkook Ryu),이영만(Younman Lee),배우근(Wookeun Bae) 한국연소학회 2011 한국연소학회지 Vol.16 No.1
Biomass gasification is a promising technology in terms of clean energy and flexible options for end use such as heat, steam, electricity, gaseous or liquid fuels. In a gasification process, reduction of tar is very important because it can cause any mechanical problems and small tar implies high energy efficiency. However, generation and conversion mechanisms of tar have not been fully understood due to its complex nature. In this study, characteristics of tar generated from different gasification stages were investigated. Korean pine woodchip was used as feedstock and tar was sampled in a separate way during devolatilization and char gasification stage, investigated. As a result, more various kinds of hydro carbon compounds were identified in the devolatilization stage than char gasification stage because primary tar compounds are released mostly from pyrolysis of cellulose and hemicellulose. When the reaction temperature increased up to 900℃, tar composition becomes simplified into about 10 aromatic compounds mostly with 1-4 rings without substitution up to phenanthrene. The sampled tar in the char gasification stage mostly contains 5-7 simple aromatic compounds.
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.
0.1 MWth 급 순산소 순환유동층 연소 공정에서 CO2 원천분리 특성
문지홍(Ji-Hong Moon),조성호(Sung-Ho Jo),문태영(Tae-Young Mun),박성진(Sung Jin Park),Nguyen Hoang Khoi,이재구(Jae-Goo Lee) 한국열환경공학회 2019 한국열환경공학회 학술대회지 Vol.2019 No.춘계
순산소 연소 기술에서는 공기에서 질소가 분리된 순산소와 재순환된 배기가스를 산화제로 이용하여, 배기가스의 수분 및 불순물을 제거하면 고순도의 이산화탄소만 배출된다. 이를 이산화탄소 저장 및 이용 기술에 적용하여 궁극적으로 zero-emission을 실현할 수 있는 기술이다. 이를 구현하기 위해서는 배기가스의 먼지, NOx, SOx, 물 등을 제거하는 것이 중요하다. 본 연구에서는 연료다변화가 가능한 순환유동층 공정에 순산소 연소 기술을 적용한 0.1 MW 급 순산소 순환유동층 설비를 이용하여 다양한 연료들의 공기/순산소 연소 및 대기오염물질 배출 특성을 알아보았다. 기존 공기 연소와 비교하여 연소 효율은 2% 이상 상승하였고, 대기오염물질 배출량은 후처리 공정 없이 80% 이상 감소됨을 확인하였다.
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.
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.