SK Innovation Global Technology

Daejeon, South Korea

SK Innovation Global Technology

Daejeon, South Korea
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Lee J.W.,Institute for Advanced Engineering | Chung S.W.,Institute for Advanced Engineering | Ryu S.O.,Institute for Advanced Engineering | Lee J.E.,Institute for Advanced Engineering | And 4 more authors.
Korean Journal of Chemical Engineering | Year: 2016

The pneumatic transport characteristics of pulverized coal with very coarse grain size were investigated, especially related to fast circulating fluidized bed gasifier. The lock hopper system was used along with the top discharge blow tank technology to examine the transportation characteristics of pulverized coal. The most important factors among the pulverized coal transportation properties were mass flow rate of pulverized coal and the solid loading ratio, which changed with the amount of fluidization nitrogen and differential pressure between injection hopper and gasifier. The mass flow rate of the pulverized coal and the solid loading ratio were linearly proportional to changes in differential pressure, and were inversely proportional to changes in the amount of fluidization nitrogen. In the case of extended transport line, similar feeding characteristics were obtained by increasing the differential pressure while the level of fluidization nitrogen was kept constant. Pressure losses were observed with changes in the mass flow rate of pulverized coal, solid loading ratio, and the transport gas density in horizontal and vertical, both upward and downward, straight pipelines and at bends. Characteristics of pressure losses under various operating conditions were correlated with the nondimensional numbers such as the Reynolds number, Froude number, solid/gas density ratio, and solid loading ratio. Such correlations were reasonably consistent with the experimental results. © 2016 Korean Institute of Chemical Engineers, Seoul, Korea


Cho S.,Seoul National University | Jeong H.,Seoul National University | Han C.,Seoul National University | Jin S.,SK Innovation Global Technology | And 2 more authors.
Journal of Chemical Engineering of Japan | Year: 2012

Estimation algorithms to measure the actual performance of a lithium-ion battery are presented for real-time online monitoring. Capacity was selected as the representative variable indicating the performance of the battery. Three algorithms were suggested to estimate the degree of capacity fading: principal algorithm, supplementary algorithm, and hybridized algorithm. The principal algorithm was based on a simplied equivalent circuit model and a soft sensor technique. The soft sensor technique was based on a system identication methodology with moving horizon estimation. The supplementary algorithm was developed to compensate for the problem of computational load. Finally, both the algorithms were combined to develop a complementary hybridized algorithm. The suitability of the algorithms was demonstrated with real-time online monitoring of fresh and aged cells using cyclic experiments. © 2012 The Society of Chemical Engineers, Japan.


Cho H.,Yonsei University | Cha B.,Yonsei University | Ryu J.,SK Innovation Global Technology | Kim S.,SK Innovation Global Technology | Moon I.,Yonsei University
Computer Aided Chemical Engineering | Year: 2012

In general, growing particle deposit in reactor cyclone duct has caused operational safety problems as well as a decrease of the cyclone efficiency. In this paper, Computational Particle Fluid Dynamics (CPFD) simulation for forecasting the behaviors of particle deposit formation in cyclone duct in Residue Fluidized Catalytic Cracking (RFCC) process is carried out. The CPFD simulation based on Multi-Phase Particle In Cell (MP-PIC) method in which particle phase is based on a stochastic particle model using the Lagrangian method and fluid phase based on an Eulerian method. We aim at analyzing the flow patterns of both particles and fluids, depending on the different sizes and shapes of the cyclone duct. As a result, we found that low speed zone existed on the duct 90° (inlet position 0) at the initial time. Some particles passing out of main flow path tend to stick to the wall of the cyclone duct due to its low speed. A set of regions where particle deposit formation takes place are set as a start point for CPFD simulation. The deposit grew up to the size of 90mm thick, and sometimes fell off due to scouring phenomenon, which results in plugging in the dipleg, leading to serious problems such as carryover. © 2012 Elsevier B.V.


Cho S.,Seoul National University | Jeong H.,Seoul National University | Han C.,Seoul National University | Jin S.,SK Innovation Global Technology | And 2 more authors.
Computers and Chemical Engineering | Year: 2012

This paper describes a state-of-charge estimation methodology for lithium-ion batteries in hybrid electric vehicles. The proposed methodology is intended for SOC estimation under various operating conditions including changes in temperature, driving mode or power duty. The suggested methodology consists of a recursive estimator and employs an equivalent circuit as the electrochemical cell model. Model parameters are estimated by parameter map on experimental cell data with various temperatures and current conditions. The parameter map is developed by a least sum square error estimation method based on nonlinear programming. An adaptive estimator is employed and is based on the combination of current integration and battery model based estimation. The proposed SOC estimation methodology is demonstrated with experimental LiB pack data under various driving schedules with low and ambient temperature and sensor failure cases. Our results show that the proposed methodology is appropriate for estimating SOC under various conditions. © 2012 Elsevier Ltd.


Lee J.-W.,Ajou University | Yun Y.,Ajou University | Chung S.-W.,Ajou University | Kang S.-H.,Ajou University | And 3 more authors.
Fuel | Year: 2014

The design concept of an entrained bed gasifier is presented. A 3 t/d-scale gasification system was constructed based on this concept. Syngas residence time in the gasifier was set to 2 s, relatively shorter than that of commercial gasifiers, to verify the possibility of complete gasification reaction within a short residence time. A series of gasification tests were conducted under high pressures and high temperatures. Performance data of the gasification experiment using multiple swirl burners showed that the carbon conversion and cold gas efficiency were higher than 98% and 72%, respectively. This high performance seemed to be attributable to the effects of rigorous mixing of oxygen and pulverized coal by the strong swirl flow and the relatively uniform oxygen concentration by the swirling plug flow. Syngas composition of the experimental result well agreed with that of the equilibrium state. This project demonstrated the feasibility of complete gasification reaction within a short residence time for low-rank coal of high reactivity. © 2013 Elsevier Ltd. All rights reserved.


Tallman M.J.,Kellogg Brown and Root | Eng C.N.,Catalyst and Process Randnter | Choi S.,SK Innovation Global Technology | Park D.S.,SK Innovation Global Technology
AIChE Ethylene Producers Conference Proceedings | Year: 2011

With the number of new ethane-based crackers coming on line in the next few years, it is anticipated that the traditional source of nearly two-thirds of the world's propylene, steam crackers, will fall short of demand. Thus, there is great interest in new propylene-on-purpose technologies. One such technology is the Advanced Catalytic Olefins (ACO™) process, an FCC-type process which cracks straight run feeds such as naphtha (already the feed source for approximately half of the world's ethylene production) to large quantities of propylene and ethylene. Compared to a traditional steam cracker, ACO produces significantly more propylene (typical P/E production ratio is approximately 1:1) and more total olefins at lower energy consumption and C02 footprint. A description of the ACO process is provided, along with an economic comparison to steam cracking when processing a typical naphtha feed. A description of the ACO Demonstration Unit constructed by SK Global Chemical (formerly SK Energy) at its site in Ulsan, Korea, the first commercial demonstration of ACO technology, is also provided, including a summary of early operations which began in 4Q10.


Tallman M.J.,Kellogg Brown and Root | Eng C.N.,Kellogg Brown and Root | Choi S.,SK Innovation Global Technology | Park D.S.,SK Innovation Global Technology
AIChE Annual Meeting, Conference Proceedings | Year: 2011

With the number of new ethane-based crackers coming on line in the next few years, it is anticipated that the traditional source of nearly two-thirds of the world's propylene, steam crackers, will fall short of demand. Thus, there is great interest in new propylene-onpurpose technologies. One such technology is the Advanced Catalytic Olefins (ACO™) process, an FCC-type process which cracks straight run feeds such as naphtha (already the feed source for approximately half of the world's ethylene production) to large quantities of propylene and ethylene. Compared to a traditional steam cracker, ACO produces significantly more propylene (typical P/E production ratio is approximately 1:1) and more total olefins at lower energy consumption and CO 2 footprint. A description of the ACO process is provided, along with an economic comparison to steam cracking when processing a typical naphtha feed. A description of the ACO Demonstration Unit constructed by SK Global Chemical (formerly SK Energy) at its site in Ulsan, Korea, the first commercial demonstration of ACO technology, is also provided, including a summary of early operations which began in 4Q10.


Tallman M.J.,Kellogg Brown and Root | Eng C.N.,Kellogg Brown and Root | Choi S.,Catalyst and Process R and nter | Park D.S.,SK Innovation Global Technology
11AIChE - 2011 AIChE Spring Meeting and 7th Global Congress on Process Safety, Conference Proceedings | Year: 2011

Steam cracking and refinery sources will not keep pace with future propylene demand. Thus, on-purpose technologies, e.g., Advanced Catalytic Olefins (ACO™) are becoming more prevalent. A discussion on ACO covers its features; economic comparison to steam cracking when processing a typical naphtha feed; and the ACO Demonstration Unit constructed by SK Global Chemical at its site in Ulsan, Korea. This is an abstract of a paper presented at the 2011 AIChE Spring Meeting & 7th Global Congress on Process Safety (Chicago, IL 3/13-17/2011).

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