• Applied Chemistry for Engineering
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• v.22 no.6
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• pp.664-671
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• 2011

The vacuum residue of petroleum refinery, i.e. asphalt, was modified through a non-catalytic air blowing process to prepare the semi-blown asphalt. Changes in composition, chemical structure, and physical properties of asphalt were examined. The result from the thin layer chromatography showed that the asphaltene content in asphalt was increased by the air blowing on account of the aromatization of aliphatic hydrocarbon and condensation. These changes in molecular structure were also confirmed by $^1H-NMR$, differential scanning calorimetry, and thermogravimetry. Because of the molecular structure changes, the penetration of asphalt was decreased and the softening point and the flash point of asphalt were increased.

• Proceedings of the Membrane Society of Korea Conference
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• 1994.03a
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• pp.113-129
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• 1994

수소는 여러 기체중에서 분자의 크기가 가장 작고, 막에 의한 분리가 쉬워 기체 막분리 공정 중에서 제일 먼저 개발 상업화 되었다. 기체분리막의 발전 역사를 살펴보면 1965년 Du Pont 사가 polyethyleneterephthalate(PET) 중공사 기체분리 장치를 만든 것이 최초이다. 그러나 이 장치는 시판되지 않았다. 1979년 Monsanto사가 다공성 polysulfone 중공사에 polyimethylsiloxane계 고분자를 박막형태로 도포한 복합막을 개발하여 이것을 이용한 공업적 규모의 수소분리장치(Prism separator) 를 개발하였는데 이 장치가 널리 퍼지게 되었다. 이 분리막은 현재 석유화학 및 석유정제공업 플랜트 폐가스로부터 수소회수, Oxo합성 기체중의 CO/H$_{2}$ 몰비 조절등의 분야에서 사용되고 있다. 본 논문에서는 수소 분리 회수용 고분자기체막을 중심으로 분자설계, 공정현화 및 최근 연구동향 등을 살펴보고자 한다.

• Korean Chemical Engineering Research
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• v.58 no.4
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• pp.565-572
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• 2020

This study developed a software platform using machine learning of artificial intelligence to optimize the distillation column system. The distillation column is representative and core process in the petrochemical industry. Process stabilization is difficult due to various operating conditions and continuous process characteristics, and differences in process efficiency occur depending on operator skill. The process control based on the theoretical simulation was used to overcome this problem, but it has a limitation which it can't apply to complex processes and real-time systems. This study aims to develop an empirical simulation model based on machine learning and to suggest an optimal process operation method. The development of empirical simulations involves collecting big data from the actual process, feature extraction through data mining, and representative algorithm for the chemical process. Finally, the platform for the distillation column was developed with verification through a developed model and field tests. Through the developed platform, it is possible to predict the operating parameters and provided optimal operating conditions to achieve efficient process control. This study is the basic study applying the artificial intelligence machine learning technique for the chemical process. After application on a wide variety of processes and it can be utilized to the cornerstone of the smart factory of the industry 4.0.

• Proceedings of the KIEE Conference
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• 2007.04a
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• pp.128-130
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• 2007

The research degined model which was integrated Cache technical for improvement of modebus protocol. The mode bus it leads and it does not solve in existing to shorten the tank data computing time. It desigine the algorithm which discriminates the shift time of the petrochemistry process tank m following. It is an objective of dissertation.

• Korean Chemical Engineering Research
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• v.58 no.4
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• pp.550-564
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• 2020

Distillation columns are one of the main equipment used for the separation of chemical components in petrochemical process design. However, in spite of the efficient operation in wide range, and the advantage of data collection for equipment verification, the distillation columns are inherently known for high energy consumption and capital cost. Hence, the trade-off analysis needs to be done between investment cost and operation cost to develop the most economical distillation columns. This study was conducted using Aspen Plus, a popular process simulation program, in the pursuit of broad application by as many process engineers as possible. In this paper, design variables for optimization of distillation columns were defined to improve emphatically the design quality with reducing erratic practice of many engineers. In addition, by eliminating unnecessary reviewing step and establishing systematic and efficient procedures, the amount of time for design and human resources were minimized. Aspen Process Economic Analyzers (APEA) program was introduced in order to calculate the investment cost reliably, and the efficient systematic procedure for utilization of APEA was established.

• Resources Recycling
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• v.28 no.6
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• pp.36-45
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• 2019

The spent petroleum catalysts contain rare metals such as vanadium, nickel, molybdenum, and cobalt. Therefore, the leaching of these rare metals from spent petroleum catalysts by organic acid was investigated in the present study. The leaching efficiency of metals by organic acid was in the following order: oxalic acid > tartaric acid > citric acid > maleic acid > ascorbic acid. Among the organic acids employed in this work, oxalic acid can be considered to be superior to the other acids in terms of metals leaching efficiency. The effect of several leaching conditions such as temperature, acid concentration, pulp density, stirring speed, and reaction time on the leaching of metals was investigated. Vanadium and molybdenum were selectively dissolved by oxalic acid from the spent catalysts. The leaching kinetics of vanadium by oxalic acid was also investigated. An activation energy of 8.76 kJ/mol indicated that the leaching kinetics of vanadium by oxalic acid solution was controlled by mass transfer.

• Korean Chemical Engineering Research
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• v.44 no.1
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• pp.23-34
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• 2006

The production of various commodity chemicals including fine chemicals, pharmaceuticals, bulk chemicals, plastics, and fuels is based on fossil resources such as petroleum. However, the limited reserves and ever-increasing demand of petroleum lead to the rapid elevation of its price. In addition, the traditional chemical processes using petroleum as a raw material have been imposing a serious environmental burden to our planet including global warming. These problems can be alleviated substantially by employing biological raw materials and bioconversion processes. Industrial biotechnology is expected to significantly complement or replace the current petroleum-based industry and to play an important role in bringing about so-called 'bio-based society'.

• 한국가스학회:학술대회논문집
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• 2002.05a
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• pp.41-45
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• 2002

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2000.06a
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• pp.64-69
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• 2000

오늘날 분진은 석유 화학공업, 제약공업, 플라스틱공업 등 기능이 점점 다양화되고 있으며 산업분야에서도 광범위하게 이용되고 있다. 그로 인해 분진 폭발사고는 대형 공정에서뿐만 아니라 저장, 취급, 운송하는 일반화된 공정에서도 정전기 방전등의 점화원에 의해 화재 및 폭발의 위험성이 증가하고 있다. 이러한 재해를 미연에 방지하기 위해 안전관리의 일환으로 분진의 최소착화에너지(Minimum Ignition Energy; MIE)를 측정하여 관리하고 있다. (중략)

• Proceedings of the Membrane Society of Korea Conference
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• 1991.10a
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• pp.56-57
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• 1991

해수로 부터 담수를 얻기 위한 방법으로는 증발법, 역삼 투압법, 전기투석법, 냉동법등을 들 수 있다. 이 중에서 역삼투압법은 상변화가 필요없기 때문에 소요 에너지가 적고 장치가 COMPACT 하여 설치비 및 설치부지가 적게든다는 이점을 가지고 있으며, 특히 최근에는 우수한 분리막의 개발 및 공정 기술의 향상으로 다른 공정들에 비해 경쟁력을 갖게 되었다. 본고는 인도네시아, WEST JAVA의 한 석유 화학 단지를 조성 하는데 있어 각 공장에 필요한 공업 용수를 일괄 공급 하기위한 해수 담수화공장 (8000 m$^3$일, 향후증설 8000 m$^3$일)을 건설하기 위한 것으로서 코오롱 엔지니어링(주)에서 수행한 타당성 조사 및 엔지니어링 결과를 토대로 작성된 것이다.