Catalyst and Process Randnter

Daejeon, South Korea

Catalyst and Process Randnter

Daejeon, South Korea
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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.

Chung Y.-M.,Catalyst and Process Randnter | Kwon Y.-T.,Catalyst and Process Randnter | Kim T.J.,Catalyst and Process Randnter | Oh S.-H.,Catalyst and Process Randnter | Lee C.-S.,Chungnam National University
Chemical Communications | Year: 2011

A highly efficient and industrially viable catalyst design for the direct synthesis of H2O2 from H2 and O2 was realized by the encapsulation of Pd nanoparticles in polyelectrolyte multi-layers on a sulfonated resin. The continuous production of 9.9 wt% H 2O2 was achieved under intrinsically safe and non-corrosive conditions without any loss of activity. © 2011 The Royal Society of Chemistry.

Park H.J.,Korea Research Institute of Chemical Technology | Kim H.-D.,Korea Research Institute of Chemical Technology | Kim T.-W.,Korea Research Institute of Chemical Technology | Jeong K.-E.,Korea Research Institute of Chemical Technology | And 5 more authors.
ChemSusChem | Year: 2012

Now in 3D! Three-dimensionally bimodal carbons (3D-BMC) with mesopores of tunable size (controlled through the polymerization of the carbon precursor) are synthesized. After loading with platinum, the catalysts are used in aqueous phase reforming of polyols, and show superior performance in terms of carbon conversion, hydrogen yield, selectivity, and hydrogen production rate compared to platinum catalysts supported on activated carbon or two-dimensional CMK-3. © 2012 Wiley-VCH Verlag GmbH&Co. KGaA, Weinheim.

Kim S.W.,Catalyst and Process Randnter | Kim S.D.,Korea Advanced Institute of Science and Technology
International Journal of Heat and Mass Transfer | Year: 2013

The effect of pressure on the average and local heat transfer coefficients between a submerged horizontal tube (25.4 mm-O.D.) and a fluidized bed has been determined in a fluidized-bed-heat-exchanger (FBHE; 0.20 × 0.26 × 0.58 m-high) of silica sand particles. The heat transfer coefficients were measured around the tube circumference by thermocouples. The average heat transfer coefficient (havg) exhibits a maximum value with variation of gas velocity (Ug) irrespective of pressure. The havg increases with increasing pressure at a given fluidizing number (U g/Umf) due to increase of gas density and improvement of fluidizing quality with indication of low standard deviation of solid holdup fluctuation. Variation of instantaneous local heat transfer coefficient (h i) is a function of bubble behavior around the tube surface. The hi exhibits higher values at the bottom than top location of the tube, and the highest value at the side of the tube (0) at the given bed pressure. Instantanous hi variations at the top regions (+45, +90) becomes much uniform with high peak frequency at higher pressures. The obtained maximum heat transfer coefficients (hmax) in terms of the maximum Nusselt numbers (Numax) have been correlated with Archimedes, Prandtl and Froude numbers. © 2013 Elsevier Ltd. All rights reserved.

Kim S.W.,Catalyst and Process Randnter | Park D.K.,Korea Advanced Institute of Science and Technology | Kim S.D.,Korea Advanced Institute of Science and Technology
Korean Journal of Chemical Engineering | Year: 2013

Pyrolytic kinetic parameters of Jatropha seedshell cake (JSC) were determined based on reaction mechanism approach under isothermal condition in a thermobalance reactor. Avrami-Erofeev reaction model represents the pyrolysis conversion of JSC waste well with activation energy of 36.4 kJ mol-1 and frequency factor of 9.18 s-1. The effects of reaction temperature, gas flow rate and feedstock particle size on the products distribution have been determined in a bubbling fluidized bed reactor. Pyrolytic bio-oil yield increases up to 42 wt% at 500 °C with the mean particle size of 1.7 mm and gas flow rate higher than 3Umf, where the maximum heating value of bio-oil was obtained. The pyrolytic bio-oil is characterized by more oxygen, lower HHVs, less sulfur and more nitrogen than petroleum fuel oils. The pyrolytic oil showed plateaus around 360 °C in distribution of components' boiling point due to high yields of fatty acid and glycerides. © 2013 Korean Institute of Chemical Engineers, Seoul, Korea.

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