• Title/Summary/Keyword: 석유시스템분석

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Understanding of Offshore Drilling System and Trend Analysis (해양 시추시스템 구성요소에 대한 이해 및 동향분석)

  • Woo, Nam-Sub;Kwon, Jae-Ki;Park, Jong-Myung;Kim, Sang-Shik;Kim, Young-Ju
    • Transactions of the KSME C: Technology and Education
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    • v.1 no.1
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    • pp.33-38
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    • 2013
  • Offshore drilling refers to a mechanical process where a wellbore is drilled through a seabed. It is typically carried out in order to explore for and subsequently extract petroleum which lies in rock formations beneath the seabed. There are many different type of facilities from which offshore drilling operations take place. These include bottom founded drilling rigs, combined drilling and production facilities either bottom founded or floating platforms, and deepwater mobile offshore drilling units including semi-submersibles and drillships. These are capable of operating in water depths up to 3,000 m. In this paper, we introduce the drilling system, which is mounted on the offshore drilling facilities.

Effect of V2O3 and CaO Concentrations on the Viscosity of 5-Component Petcoke Slag (V2O3와 CaO의 농도에 따른 5-성분계 석유코크스 슬래그의 점도 변화)

  • Yang, Yoonjung;Oh, Myongsook S.
    • Applied Chemistry for Engineering
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    • v.31 no.6
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    • pp.688-696
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    • 2020
  • Petroleum coke (petcoke) is widely used, next to coal, as a gasification feedstock. In gasification processes, the viscosity of the ash and the formation of crystalline phases must be understood to ensure the continuous removal of slag. This study investigates the effect of CaO and V2O3 on petcoke slag viscosity. The viscosity of the molten slag was measured in the temperature range of 1100~1600 ℃ while varying the concentration of each component. The crystalline phases formed in a cooled slag were examined. The most slag samples tested in this study exhibited crystalline slag behavior. The increased CaO concentration resulted in a lower viscosity and a lower Tcv. The viscosity behavior changed from the glassy to crystalline slag and also showed a higher Tcv as the concentration of V2O3 increases. Most slag samples showed different crystalline phases from top to bottom. Anorthites and Ca-V phases were observed in the top and middle section, while the bottom section mainly showed V2O3 and anorthite. The vanadium in the ash forms Ca-V and V-Fe phases and also remains in molten slag. A low melting Ca-V phase can contribute to lowering the viscosity.

Numerical Simulation of Catalyst Regeneration Process for Desulfurization Reactor (수치해석을 통한 탈황반응기용 촉매의 재생공정 분석)

  • Choi, Chang Yong;Kwon, Sang Gu;Liu, Jay;Im, Do Jin
    • Clean Technology
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    • v.23 no.2
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    • pp.140-147
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    • 2017
  • In this study, we performed numerical simulation for the catalyst regeneration process of diesel desulfurization reactor. We analyzed the changes in regeneration process according to purge gas flow rate, catalyst permeability, reactor size, and heat loss of reactor. We have found that the regeneration process is very much affected by temperature changes whereas it is hardly affected by catalyst permeability and porosity. We also estimated the regeneration time according to purge gas flow rate and initial temperatures and have found that increasing purge gas temperature is more effect for fast regeneration. The present results can be utilized to design a regeneration process of diesel desulfurization reactor for a fuel cell used in ships. Furthermore, the present work also can be used to design low sulfur diesel supply in oil refineries and therefore contribute to the development of clean petrochemical technology.

A study on the solution prepared system design for analysis automation (분석자동화를 위한 용액 조제 시스템 설계에 관한 연구)

  • Lee, Sang-Chul;Kang, Seong-Jun;Joung, Yang-Hee
    • The Journal of the Korea institute of electronic communication sciences
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    • v.8 no.7
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    • pp.1033-1038
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    • 2013
  • Petrochemical complex has been a lot of research for the development of a more mature product and analysis for mid-process and finished products is essential in these process. But these analyzes are still by hand work samples being manufactured in many parts. Moreover they are exposed to hazardous chemical and such as the analysis is being made in a very poor working conditions. In this paper, in order to solve such problems the multi control system has been developed for the automated analysis. In addition, the organic behavior of these systems and the development of a program for the automated applied, and throughout the experiment to verify the reliability of this device for the accuracy of the dosing pumps for the standard solution prepared with a range of error of ${\pm}0.01m{\ell}$ was able to get a very good experimental results.

Analysis of Chemical Constituents of Saccharides and Triterpenoids in the Korean Native Mistletoes - II. Screening the Extractives of Korean Camellia Mistletoe (Pseudixus japonicus) for Cytotoxicity - (한국산(韓國産) 겨우살이류(類)의 당류(糖類)와 triterpenoids의 화학적(化學的) 조성(組成) 분석(分析) - II. 동백나무겨우살이 추출물의 항암활성 성분 검색 -)

  • Kim, Pyoung-Su;Ahn, Won-Yung
    • Journal of the Korean Wood Science and Technology
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    • v.24 no.1
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    • pp.87-94
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    • 1996
  • 한국산 동백나무겨우살이(Pseudixus japonicus) 추출물의 암치료를 위한 생약으로서 활성 유효성을 검증하기 위하여 메탄올, 석유에테르, 클로로포름, 초산 에틸 용매로 순차적으로 추출하여 겨우살이 추출물의 다섯 가지 분획을 얻어, 이에 대하여 in vitro로 1차와 2차 검색 시스템을 사용해 항암활성 성분을 체계적으로 검색하였다. 다섯 가지 분획 중 클로로포름 가용성 분획이 1차 검색 세포인 $P388D_1$에 대해 가장 높은 항암활성을 나타내어 MSB1, NIH/3T3, SNU-1, SNU-C2A 등 2차 검색 시스템에 대해 클로로포름 가용성 분획의 항암활성을 다양한 농도하에서 비교 검색하였다. 혈액암 세포중 특히 $P388D_1$의 생장이 클로로포름 추출물에 의해 강하게 저해되었으며, 형질전환된 생쥐의 태아 섬유아세포와 사람의 대장암, 위암세포들도 어느 정도의 생육저해를 나타내었다. 이 클로로포름 가용성 분획의 주성분은 원소분석, 발색시약과의 반응, IR, GC-MS, $^{13}C$-NMR의 스펙트럼의 결과로 세 종류의 알칼로이드 화합물로 확인되었고, 부성분으로는 지방산 메틸 에스테르와 프탈라이드 화합물이 MS 스펙트럼을 통해 동정되었다.

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Introduction to Quality Management System of Rocket Fuel at NARO Space Center (나로우주센터의 발사체 연료유 품질관리 과정 소개)

  • Kim Seong-Lyong
    • Journal of Aerospace System Engineering
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    • v.18 no.1
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    • pp.79-87
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    • 2024
  • The Korean launch vehicle (KSLV-II) has used commercial aviation jet fuel, Jet A-1. Fuel specifications were introduced from Jet A-1 specifications. However, specifications and inspection methods of moisture and particulate matters were changed digitally for convenience and accuracy. To control fuel quality, a fuel management system was established to determine suitability by inspecting it at each stage of warehousing, storage, and application. An analysis room was then established at the Naro Space Center. The possibility of fuel mixing was blocked by warehousing inspection. Long-term component changes were then observed by storage inspection. Finally, suitability of the engine test or the launch vehicle test was determined through application inspection. Long-term analysis verified that the space center's fuel oil storage method was appropriate and that the quality management system was able to handle hundreds of engine tests and several flight tests.

Ignition Characteristics of Petroleum-based and Bio Aviation Fuel According to the Change of Temperature and Pressure (온도와 압력의 변화에 따른 석유계 및 바이오항공유의 점화특성 분석)

  • Kang, Saetbyeol
    • Clean Technology
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    • v.25 no.3
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    • pp.238-244
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    • 2019
  • In this study, the ignition characteristics of petroleum-based aviation fuel (Jet A-1), bio aviation fuel (Bio-6308), and blended aviation fuel (50:50, v:v) were analyzed in accordance with change of temperature and pressure. The ignition delay time of each aviation fuel was measured by combustion research unit (CRU) and the compositions of the fuels were analyzed by GC/MS and GC/FID for qualitative and quantitative results. From the results, it was confirmed that the ignition delay times of all aviation fuels were shortened with increasing temperature and pressure. In particular, the effect of temperature was larger than the effect of pressure. Also, the ignition delay time of Jet A-1 was the longest at all measurement conditions, and it was judged that this result is because of the structurally stable characteristics of the benzyl radical generated during the oxidation reaction of the aromatic compound (about 22.48%) in Jet A-1. Also, it was confirmed that Jet A-1 had no section where the degree of shortening of ignition delay time was decreased by increasing temperature, which was because the benzyl radical inhibits the response that can affect the negative temperature coefficient (NTC). The ignition characteristics of blended aviation fuel (50:50, v:v) showed a similar tendency to those of Jet A-1, rather than to those of Bio-6308, so that the blended aviation fuel (50:50, v:v) can be applied to the existing system without any change.

Analysis of Influences on the Coast Construction Facilities depending on Sea Level Rise (해수면 상승에 따른 연안 건설시설물의 영향 분석)

  • Park, Jun-Young;Bu, Yang-Su;Lee, Dong-Wook
    • Proceedings of the KAIS Fall Conference
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    • 2009.05a
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    • pp.825-828
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    • 2009
  • 기후변화는 기상재해뿐만 아니라 지속적인 해수면 상승의 원인이 되고 있으며, 자연 생태계화 인간의 사회, 경제시스템 전반에 걸쳐 영향을 미치고 있으며, 건설분야도 이와 무관하지 않다. 특히 기후변화는 해수면 상승으로 이어져 사회기반시설인 항구, 연안도로, 철도, 빌딩 등과 연안산업인 석유 및 석유화학공장, 그리고 서비스업인 관광에 대한 위협으로 나타나고 있다. 이러한 해수면 상승은 토지 및 건물의 재산 가치 하락과 해수면 상승에 따른 보호비용 증대, 구조물의 급속한 노후화에 따른 유지관리비용의 증가뿐만 아니라 정치적 제도적 불안 및 사회동요 등을 유발할 수 있다. 우리나라의 경우, 지난 100년간 6대 도시 평균기온이 약 $1.5^{\circ}C$ 상승하였으며, 해수면(제주기준)은 40년간 22cm가 상승하였다. 특히 제주의 경우 매년 5mm씩의 해수면 상승을 보이고 있으며 이는 전 지구 해수면 상승률보다 3배 높은 수치이다. 본 연구는 해수면의 상승에 따른 건설분야의 영향을 분석하기 위한 선도적인 연구로서, 연구의 범위를 제주지역에 국한하였으며, 해수면 상승에 따른 영향 지역을 추출하고, 영향 지역 내 건설시설물 정보를 추출하기 위한 절차를 규명하였다. 본 연구 결과는 유지보수 및 시설물 이설에 따른 공사비 산출의 근거가 될 뿐만 아니라 관련 예산 확보에 대한 근거 자료로 활용될 수 있을 것이다. 향후 관련 지역의 유지보수 및 이설 공사비 정보의 추출 및 DB 구축을 통해 연안 건설 시설물의 이설에 따른 공사비를 예측할 수 있을 것이다.

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A Study on the Analysis and Methods to Improve the Management System for Building Energy Database (국가 건물에너지통합관리시스템의 데이터 품질 분석 및 개선방안 연구)

  • Kim, Sung-Min;Yoon, Jong-Don;Kwon, Oh-In;Shin, Sung-Eun
    • Journal of Energy Engineering
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    • v.25 no.1
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    • pp.131-144
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    • 2016
  • Damage occur frequently around the world on climate change and the main cause of greenhouse gas emissions regulation is growing. To this end, the government has built integrated management system for national building energy. The building energy information is total 6.8 million complex. Integrated management system for national building energy database are matched building registers information and energy information of the supply agencies. However, the matching process has its limitations so advanced work is in progress continuously. This study analyzed integrated management system for national building energy database quality and limitations and deduce improvement plan to increase system reliability and availability. The existing database matching average rate is 85.6%. 58.2% of the total non-matching data type has no building information. To ensure the ease of new database matching and the accuracy of the existing database matching, address standarization and building properties system are needed between building information and energy information. Also, The system construction is required to include information on other energy sources like petroleum energy which has high proportion of non-urban areas and small residential areas and renewable energy which has high potential in development and utilization.

Comparison Analysis on Characteristics and Components of Various Waste Plastic Pyrolysis Oils by Vacuum Distillation Method (감압증류를 통해 분획된 폐플라스틱 열분해유의 특성평가와 구성성분 비교분석 연구)

  • Hwayeon Jeon;Cheol Hwan Jeon;Sung Joon Park;Jae Woo Lee;Jae-kon Kim
    • Clean Technology
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    • v.29 no.4
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    • pp.262-271
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    • 2023
  • Globally, the amount of waste plastics has been occurring to environmental problems. As a result, it is necessary to research methods that utilize waste plastic pyrolysis oil (WPPO) produced by pyrolysis. One such method being studied is utilizing WPPO as a naphtha feedstock. In this study, five types of WPPO were analyzed to determine whether they can be used as raw materials for naphtha. Because of their wide boiling point range, the WPPOs were fractionated into light and heavy fractions through vacuum distillation, and the separation and purification techniques were analyzed using GC-VUV to determine the content of paraffin, olefin, and other compounds. All WPPOs showed high olefin content regardless of the source and fraction. Aromatic and paraffin content varied depending on the source, and oxygen and other compounds also varied significantly by source and fraction. In addition, the light fraction showed a carbon distribution similar to that of naphtha, whereas the heavy fraction showed a carbon distribution of C11 ~ C14. In conclusion, additional processes and raw material selection are required to utilize waste plastic pyrolysis oil as a raw material for naphtha.