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Yanggu, South Korea

Kwak B.-S.,Global Technology
AIChE 2012 - 2012 AIChE Annual Meeting, Conference Proceedings | Year: 2012

SK Innovation is Korea's first and largest oil refining company and was established in 1962 as a national oil company. The ground breaking ceremony held fifty years ago in a small city of Ulsan signaled awakening and uprise of a 5,000 year old country of 'morning calm' from the aftermath of a dog-eat-dog war. For fifty years, our company has successfully fueled a world top ten economy and is doing business in the areas of oil exploration and production, refining, petrochemicals, polymers, lubricants, battery, and information and electronics materials with the annual sales revenue exceeding USD 60 B last year. The City of Ulsan now became Korea's seventh largest city and ranked first in terms of GDP per capita in Korea. In this paper, we will go through how one company has grown by innovation and how it and its chemical engineers have been doing a pivotal role in changing a poor country's economy and people's quality of life dramatically. Source


Viet T.T.,Yonsei University | Lee J.H.,Yonsei University | Ma F.,Yonsei University | Kim G.R.,Global Technology | And 2 more authors.
Fuel | Year: 2013

Hydrocracking of vacuum residue with various types of activated carbons and metal additives was conducted at 400 °C and a hydrogen partial pressure of 3.45 MPa in supercritical m-xylene. The effects of the textural properties and surface acidity of the activated carbon on the conversion, coke formation, and distribution of oil products (naphtha, middle distillate, vacuum gas oil, and residue) were investigated. Compared to the results obtained when using bituminous coal-derived activated carbon, hydrocracking of vacuum residue with petroleum pitch-derived activated carbon resulted in a higher conversion and much higher yield of the naphtha fraction. Both activated carbons treated by acid led to an improved conversion as well as a higher naphtha fraction yield. The metal additives (Fe2O3, NiSO4, and LiC 2H3O2) to the VR hydrocracking with activated carbon in supercritical m-xylene contributed to the conversion as well as the yields of the light fraction (naphtha and middle distillate fractions). Moreover, with the addition 10 wt% Fe2O3, the yields of the conversion and light fractions were improved and coke formation on the surface of the activated carbon was reduced. © 2012 Elsevier Ltd. All rights reserved. Source


Viet T.T.,Yonsei University | Lee J.-H.,Yonsei University | Ryu J.W.,Global Technology | Ahn I.-S.,Yonsei University | Lee C.-H.,Yonsei University
Fuel | Year: 2012

Hydrocracking of vacuum residue with activated carbon was conducted in a batch reactor with two types of supercritical hydrocarbon solvents, aromatic hydrocarbons (m-xylene and toluene) and normal alkane hydrocarbons (n-hexane and n-dodecane). The supercritical reactions were performed at 400°C with H 2 partial pressures of 3.45 MPa and 6.89 MPa. The supercritical hydrocarbon solvent affected the levels of conversion and coke formation as well as the distribution of oil products (naphtha, middle distillate, vacuum gas oil, and residue). The mass ratio of each oil product to the unreacted residue differed among the supercritical solvents. Compared to the product profile in n-alkane solvents, aromatic solvents yielded much smaller naphtha fractions and larger middle distillate fractions. An increase of surface acidity of the activated carbon led to the conversion improvement observed in the supercritical reactions. However, the increased partial pressure of hydrogen was not associated with significant changes in conversion. High conversion (69.2 wt.%) with low coke (13.5 wt.%), and high quality oil products (13.0 wt.% of naphtha, 34.9 wt.% of middle distillate, 27.1 wt.% of vacuum gas oil, and 11.2 wt.% of residue) could be obtained with supercritical m-xylene and acid-treated activated carbon. © 2011 Elsevier Ltd. All rights reserved. Source


Kim S.W.,Global Technology | Koo B.S.,Sungkyunkwan University | Lee D.H.,Sungkyunkwan University
Bioresource Technology | Year: 2014

The pyrolysis of Scenedesmus sp. and Jatropha seedshell cake (JSC) was investigated under similar operating condition in a fluidized bed reactor for comparison of pyrolytic behaviors from different species of lipids-containing biomass. Microalgae showed a narrower main peak in differential thermogravimetric curve compared to JSC due to different constituents. Pyrolysis liquid yields were similar; liquid's oil proportion of microalgae is higher than JSC. Microalgae bio-oil was characterized by similar carbon and hydrogen contents and higher H/C and O/C molar ratios compared to JSC due to compositional difference. The pyrolytic oils from microalgae and JSC contained more oxygen and nitrogen and less sulfur than petroleum and palm oils. The pyrolytic oils showed high yields of fatty oxygenates and nitrogenous compounds. The microalgae bio-oil features in high concentrations of aliphatic compounds, fatty acid alkyl ester, alcohols and nitriles. Microalgae showed potentials for alternative feedstock for green diesel, and commodity and valuable chemicals. © 2014 Elsevier Ltd. Source


Kim S.W.,Global Technology | Koo B.S.,Sungkyunkwan University | Lee D.H.,Sungkyunkwan University
Bioresource Technology | Year: 2014

The catalytic pyrolysis of palm kernel shell was investigated in a fluidized bed with zsm-5 and equilibrium FCC (Ecat) catalysts. Catalytic pyrolysis oil yields were remarkably reduced and gas yields were increased due to the higher catalytic reaction of primary volatiles compared to non-catalytic pyrolysis. Char yields were affected by temperature and the pore structure of the catalysts. The pyrolysis oil was characterized by lower H/C and O/C molar ratios due to aromatization and deoxygenation of volatiles by the catalysts. The catalytic pyrolysis oils contained more oxygen and nitrogen and less sulfur than petroleum oils. The oils had a high concentration of nitriles, with a carbon number distribution similar to fatty acids. The catalytic pyrolysis oils featured high nitriles yield with Ecat and high aromatics yield in the light fraction with zsm-5, due to characteristics of the catalyst. The catalytic pyrolysis oils showed potentials as feedstocks for bio-diesel and chemicals. © 2014 Elsevier Ltd. Source

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