연구발표논문초록 ( 분리기술 (1) ) : 구형 망사 충전 흡수탑의 특성

위정호(Jung Ho Wee),이정춘(Jeong Hoo Lee),전해수(Hai Soo Chun) 한국화학공학회 1988 추계학술발표회 Vol.- No.-

국내 전력 발전 및 산업 부문에서 탄소 포집 및 저장(CCS) 기술을 이용한 이산화탄소 배출 저감

위정호(Jung Ho Wee),김정인(Jeong In Kim),송인승(In Sung Song),송보윤(Bo Yun Song),최경식(Kyoung Sik Choi) 大韓環境工學會 2008 대한환경공학회지 Vol.30 No.9

2004년 기준, 온실가스(GHG; Greenhouse Gas) 총 배출량 약 5억9,060만톤(t)CO₂로 배출량 세계 10위권인 우리나라는 국제환경의 변화를 볼 때 향후 반드시 GHG를 감축해야한다. 2004년 국내 에너지 부문 중, 전력 발전 및 산업 부분에서 배출된 이산화탄소(CO₂)량은 총 2억9,685만t으로 우리나라 GHG 전체 발생량의 53.3%를 차지하여 이 두 분야에서 CO₂ 배출을 감축시키는 것이 가장 시급하고 중요한 문제이다. 또한 이 두 분야는 산업의 특성상 CCS(Carbon Capture and Storage) 기술을 적용하여 효율적으로 CO₂를 저감할 수 있는 가장 잠재력이 높은 분야이다. 두 분야에서 효율적으로 적용될 수 있는 CCS 기술로 단기적으로는 amine을 이용한 화합흡수법이, 중, 장기적으로는 ATR(Autothermal reforming), 또는 MSR-H₂(Methane steam reformer with hydrogen separation membrane reactor)가 장착된 연소 전 기술과, SOFC+GT(Solid oxide fuel cell-Gas turbine) 같은 순산소 연소 기술이 가장 유리 할 것으로 예상된다. 이와 같은 최신 연소 전 및 순산소 연소 기술을 이용하면 향후 CO₂ 포집 비용을 $US 8.5-43.5/tCO₂로 줄일 수 있으며 이를 이용하여 전력 발전 및 산업 부분에서 발생하는 CO₂의 10%만을 감축하더라도 약 3,000만t의 CO₂를 저감할 수 있겠다. In 2004, total emissions of Greenhouse Gases(GHGs) in Korea was estimated to be about 590 million metric tons, which is the world`s 10th largest emissions. Considering the much amount of nation`s GHG emissions and growing nation`s position in the world, GHG emissions in Korea should be reduced in near future. The CO₂ emissions from two sub-sections of energy sector in Korea, such as thermal power plant and industry section(including manufacturing and construction industries), was about 300 million metric tons in 2004 and this is 53.3% of total GHG emissions in Korea. So, the mitigation of CO₂ emissions in these two section is more important and more effective to reduce the nation`s total GHGs than any other fields. In addition, these two section have high potential to qualitatively and effectively apply the CCS(Carbon Capture and Storage) technologies due to the nature of their process. There are several CCS technologies applied to these two section. In short term, the chemical absorption technology using amine as a absorbent could be the most effectively used. In middle or long term, pre-combustion technology equipped with ATR(Autothermal reforming), or MSR-H₂(Methane steam reformer with hydrogen separation membrane reactor) unit and oxyfuel combustion such as SOFC+GT(Solid oxide fuel cell-Gas turbine) process would be the promising technologies to reduce the CO₂ emissions in two areas. It is expected that these advanced CCS technologies can reduce the CO₂ avoidance cost to $US 8.5-43.5/tCO₂. Using the CCS technologies, if the CO₂ emissions from two sub-sections of energy sector could be reduced to even 10% of total emissions, the amount of 30 million metric tons of CO₂ could be mitigated.

직접 내부개질형 MCFC 에서의 메탄 - 수증기 개질 반응 특성에 관한 연구

위정호(Jung Ho Wee),전해수(Hai Soo Chun) 한국화학공학회 1997 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.35 No.3

Steam reforming reaction of methane in direct internal reforming molten carbonate fuel cell was studied. Every experiment was performed in 5 ㎝ by 5 ㎝ unit cell at 650℃ and 1 atm, and equilibrium composition calculation was performed simultaneously. The performance of the cell operated with methane showed 140 ㎃/㎠ current density at 0.7 V which differs little from the performance of the cell operated with hydrogen. The stable operating conditions with no risk of carbon deposition on catalysts could be estimated from the equilibrium composition calculation and confirmed by experiments. The risk of carbon deposition could be ruled out in the S/C ratio range above 2.5. As utilization is raised in the electrode high fuel efficiency could be obtained by the shift of steam reforming reaction equilibrium as expected from the result of the calculation.

올레핀(Olefin) 생산 공정에서 발생하는 이산화탄소 배출 저감을 위한 신기술 적용 효과

위정호(Jung Ho Wee),최경식(Kyoung Sik Choi),김정인(Jeong In Kim),이상훈(Sang Hoon Lee) 大韓環境工學會 2009 대한환경공학회지 Vol.31 No.8

플라스틱에서부터 의약품에 이르기까지 대부분 일상 제품의 핵심적 기초 원료가 되는 경질올레핀은 한 국가의 경제 규모와 성장을 예측할 수 있는 중요한 지표이다. 이러한 경질올레핀을 생산하는 NCC (Naphtha Cracking Center) 기술은 석유 관련 기간산업 중에서 가장 많은 에너지를 소비하는 공정으로 다량의 CO₂를 발생 시킨다. 본 연구에서는 다량으로 방출되는 CO₂를 감축, 저감시킬 수 있는 새로운 NCC 공정의 기술 수준과 개발 현황 및 기술 적용 가능성을 검토하였으며, 새로운 기술이 적용될 경우 CO₂ 저감 효과 및 그에 따른 탄소배출권, 그리고 에너지 절감양 등을 정량적으로 산출 하였다. 그 결과 고급 NCC 기술을 적용하면 기존 NCC 공정의 총 에너지 소비량의 약 35%를 줄일 수 있어 연간 약 330만톤의 CO₂ 감축과, 약 1,280억원의 탄소배출권 및 중유 약 152만 kL를 줄일 수 있다. 또한 촉매 접촉 분해 기술을 적용하면 연간 최대 약 380만톤의 CO₂를 저감할 수 있고 1,470억원 규모의 탄소배출권 및 약 174만 kL의 중유 소비를 줄 일 수 있다. Light olefins are very important hydrocarbons widely used as the raw materials of the most petrochemicals including plastics and medicines. In addition, the nation`s olefin production capacity is regarded as one of the key indicators to predict the nation`s economic scale and growth. Steam cracking of naphtha (or called "NCC (Naphtha Cracking Center) technology"), the traditional process to produce light olefins, is one of the most consuming energy processes among the chemical industries. Therefore, this process causes tremendous CO₂ emission. To reduce the energy consumption and CO₂ emission from NCC process, the present paper, firstly, investigates and analyses some alternative technologies which can be potentially substituted for traditional process. Secondly, applying the alternative technologies to NCC process, their effects such as energy savings, CO₂ emission reduction and CER (Certified Emission Reduction) were estimated. It is found that the advanced NCC process can reduce approximately 35% of SEC (Specific Energy Consumption) of traditional NCC process. This effect can lead to the reduction of 3.3 million tons of CO₂ and the acquisition of the 128 billion won of CER per year. Catalytic cracking of naphtha technology, which is other alternative processes, can save up to approximately 40% of SEC of traditional NCC process. This value equates to the 3.8 million tons of CO₂ mitigation and 147 billion won of CER per year.

직접 내부개질형 용융탄산염 연료전지의 음극판 위치에 따른 개질 촉매 피독에 관한 연구

위정호(Jung Ho Wee),전해수(Hai Soo Chun) 한국공업화학회 1999 공업화학 Vol.10 No.5

N/A N/A

구형 망사 충전물의 특성

권승범,위정호,이정훈,전해수,이희철 ( Seung Beom Kwon,Jung Ho Wee,Jung hun Lee,Hai Soo Chun,Hee Cheol Lee ) 한국화학공학회 1991 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.29 No.3

To investigate the characteristics of screen-packing for industrial application, measurements of absorption rates of carbon dioxide into potassium carbonate-bicarbonate buffer solution containing sodium hypochlorite as a catalyst in the screen packing column were carried out. The mass transfer coefficient and gas-liquid interfacial area of the screen packings were obtained, and also the pressure drop and liquid hold-up in the screen packing column were measured. In consideration of physical properties of the solution, 50 and 60 mesh spherical packings were used. It was found that the spherical screen packing showed the higher mass transfer rate than the ordinary commercial packings, and that the 60 mesh spherical packings was better than 50 mesh packings for the absorption.

규회석-증류수 현탁액을 이용한 고농도 CO₂ 가스의 탄산염 광물화

송해정(Hae Jung Song),한상준(Sang Jun Han),위정호(Jung Ho Wee) 大韓環境工學會 2014 대한환경공학회지 Vol.36 No.5

본 논문에서는 CO₂ 포집 및 저장에 필요한 에너지 소비를 최소화하기 위해 25-65℃ 범위의 온도 및 대기압에서 비교적높은 CO₂ 조성을(15-50 vol%) 갖는 가스 중 CO₂를 고정화하기 위해 규회석(CaSiO₃)-증류수 및 초산 현탁액을 이용한 직접적습식 탄산염 광물화를 수행하여, 각 현탁액에서의 Ca 침출률과 CO₂ 흡수 특성 및 탄산화율에 대해 규명하였다. 규회석-증류수 현탁액의 탄산화 결과 규회석 표면에 고정화된 탄소를 확인하였고 CO₂ 조성이 높을수록 저장량은 선형적으로 증가하며CO₂ 조성이 50%일 때 규회석 내 Ca 침출률은 13.2%, 탄산화율은 약 10.4%지만 같은 조건에서 규회석-초산 현탁액의 침출률은 약 63%, 탄산화율은 1.39%로 확인되었다. The present paper investigates the performance of direct wet mineral carbonation technology to fix carbon dioxide (CO₂)from relatively high CO₂ concentration feeding gas using wollastonite (CaSiO₃)-water (and 0.46 M acetic acid) suspension solution. To minimize the energy consumed on the process, the carbonation in this work is carried out at atmospheric pressure and slightlyhigher room temperature. As a result, carbon fixation is confirmed on the surface of CaSiO₃ after carbonation with wollastonitewatersuspension solution and its amount is increased according to the CO₂ composition in the feeding gas. The leaching andcarbonation ratio of wollastonite-water suspension system obtained from the carbonation with 50% of CO₂ composition feeding gasis 13.2% and 10.4%, respectively. On the other hand, the performance of wollastonite-acetic acid in the same condition is 63% forleaching and 1.39% for carbonation.

Perovskite(La0.8Sr0.2 CuO3) 전극을 이용한 이산화탄소의 전기화학적 환원에 관한 연구

박정훈,이승익,위정호,임준혁,이제근,전해수 ( Jung Hoon Park,Shung Ik Lee,Jung Ho Wee,Jun Heok Lim,Jea Keun Lee,Hai Soo Chun ) 한국화학공학회 1998 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.36 No.5

By using the electrode made of Cu based perovskite which has high conductivity and excellent redox power, the characteristics of electrochemical reduction of carbondioxide were studied. After carbondioxide is dissolved in the KOH electrolyte and carried out electrochemical reduction at the negative potential (range: -2.0 -3.0V vs. Ag/AgCl), alcohois (mathanol, ethanol, and propanol) and acetaldehyde are produced. The total efficiency of products is optimum at -2.0 V vs. Ag/AgCl and with the exception of methanol, the efficiency of products is inversely proportional to the reaction temperature. The optimum reaction temperatures at which the highest efficiency could be got for individual products are 5℃ for acetaldehyed and ethanol, 10℃ for propanol and 30℃ for methanol. And according to the tentative mechanism for the reduction of carbondioxide on the basis of these experimental efficiencies of products, ethanol and acetaldehyde were intermediates in this electrochemical reaction.

조력에너지 기술 현황 및 경제성 분석

조영범(Young-Beom Cho),위정호(Jung-Ho Wee),김정인(Jeong-In Kim) 한국에너지학회 2010 에너지공학 Vol.19 No.2

Agglomerated film model 을 이용한 용융탄산염 연료전지용 perovskite 음극의 성능예측

임준혁,이병선,정하철,김윤성,위정호,전해수 ( Jun Heok Lim,Byung Sun Lee,Ha Chull Chung,Yun Sung Kim,Jung Ho Wee,Hai Soo Chun ) 한국공업화학회 1997 응용화학 Vol.1 No.1

A dual-porosity filmed agglomerate model for the porous cathode of the molten carbonate fuel has been investigated to predict the perovskite type cathode performance. The model predicts steady-state cell performance, given the above conditions that characterize the state of the perovskite electrode. Also, the effective surface area of electrode pore was obtained by mercury porosimeter. The results of the investigation are presented in the form of plots of overpotential vs. current density with varied the electrode material, gas composition and mechanism. The predicted polarization curves are compared with the empirical data from 1 ㎠ cell.