Heesung Catalysts Corporation

South Korea

Heesung Catalysts Corporation

South Korea
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This invention relates to a method of regenerating a deactivated catalyst, which carries precious metal components including platinum and palladium and which is used to purify a gas exhausted from a compressed natural gas lean-burn engine. The method includes creating a reduction atmosphere over the catalyst. The creating the reduction atmosphere over the catalyst includes controlling an air-fuel ratio or directly injecting CNG fuel into the catalyst.


This invention relates to a method of regenerating a deactivated catalyst, which carries precious metal components including platinum and palladium and which is used to purify a gas exhausted from a compressed natural gas lean-burn engine. The method includes creating a reduction atmosphere over the catalyst. The creating the reduction atmosphere over the catalyst includes controlling an air-fuel ratio or directly injecting CNG fuel into the catalyst.


Patent
Hyundai Motor Company and Heesung Catalysts Corporation | Date: 2015-09-23

The present invention provides a non-PGM catalyst for burning carbon soot without using a noble metal, the non-PGM catalyst comprising: a cerium-praseodymium complex oxide and an iron oxide, the cerium-praseodymium complex oxide impregnated with silver (Ag). The cerium-praseodymium complex oxide illustratively consists of 60 to 95 wt % of cerium oxide and 5 to 40 wt % of praseodymium oxide, and silver (Ag) impregnated in the complex oxide is 1.5 to 3.0 parts by weight of the total weight of the complex oxide. The iron oxide may be an oxide in a form of particles separate from the cerium-praseodymium complex oxide in which silver is impregnated, and may be 0.5 to 2 parts by weight of the total weight of the cerium praseodymium complex oxide.


Patent
Heesung Catalysts Corporation | Date: 2016-10-12

Disclosed are a catalyst for dehydrogenating a paraffinic hydrocarbon and a method of preparing the same, wherein the catalyst is configured such that a sponge-type alumina support having 3D meso/macro pores is directly impregnated with an active metal, thus decreasing the diffusion resistance of a material, realizing structural stability, and maximizing the distribution of the active metal in the support, thereby significantly increasing olefin conversion and selectivity. In this catalyst, the sponge-type alumina support is directly impregnated with the active metal to thus form an active metal layer inside the support having 3D meso/macro pores that are interconnected to each other.


Patent
Heesung Catalysts Corporation | Date: 2016-03-09

The present invention relates to: a complex selective catalytic reduction (SCR) catalyst having a double-layer structure in which a V_(2)O_(5)/TiO_(2) layer is formed as an upper or lower layer and a zeolite layer containing metal is formed as a lower or upper layer, or a complex SCR catalyst having a single-layer structure formed from a mixture of V_(2)O_(5)/TiO_(2) and zeolite containing metal; and an SCR catalyst having improved occlusion of ammonia capable of efficiently converting NOx into a harmless component in an acceleration and deceleration section of a diesel engine and an exhaust system having improved diesel engine exhaust gas purification, especially purification of nitride oxides at low temperatures by using the same.


Patent
Heesung Catalysts Corporation | Date: 2016-11-02

Disclosed is a catalyst composition for inhibiting the deactivation of a catalyst for purifying exhaust gas from a compressed natural gas combustion system, which contains platinum and palladium as precious metal components. Specifically, a catalyst for purifying exhaust gas from a compressed natural gas vehicle or a static combustion system is configured such that a ceramic substrate is impregnated with palladium-impregnated first alumina, platinum-impregnated second alumina, and a ceria component, wherein the first alumina is further impregnated with a cocatalyst selected from the group consisting of barium, nickel, lanthanum, samarium, and yttrium, thus significantly inhibiting the deactivation of the CNG lean burn engine catalyst.


Patent
Heesung Catalysts Corporation | Date: 2016-03-09

The present invention provides a quantitative catalyst supply device that supplies a predetermined amount of catalyst slurry through an injection port formed through a container bottom. The quantitative catalyst supply device includes: an extendible supply pipe connected to a hopper and filled with catalyst slurry; a head connected to the supply pipe and supplying catalyst slurry to the injection port at the container bottom; a cylinder connected to a side of the supply pipe and supplying a predetermined amount of catalyst slurry through the head; and valve units disposed in an upper portion and a lower portion of the supply pipe spaced from the cylinder and opened or closed by operation of the cylinder.


Patent
Heesung Catalysts Corporation | Date: 2016-10-26

Disclosed are a washcoat and a catalyst member coated with the washcoat, wherein the washcoat, which is applied on a substrate as a catalyst member for purifying exhaust gas, includes a catalytically inactive refractory oxide not impregnated with catalytic components, and thus, even when the support structure physically collapses due to the sintering of the support, the diffusion rate of exhaust gas can be maintained, and the exposed portion of catalytically active components can be maintained, thus increasing the service life of the catalyst.


Patent
Heesung Catalysts Corporation | Date: 2015-07-01

The present invention relates to a high performance SCR catalyst system for solving problems of an SCR catalyst system to be applied for the treatment of an exhaust gas of a marine diesel engine, particularly, a turbocharged engine, wherein a catalyst module for removing SOF components is attached to the back end of an engine, and a SCR catalyst module is successively provided downstream thereof, thereby enabling effective removal of nitrogen oxides. In addition, SOF components are decomposed at a relatively low temperature of 200 C or lower, thereby solving problems such as a decrease in SCR catalytic activity due to the accumulation of SOF components, which are a sticky liquid mixture, on the surface of an SCR catalyst, and clogging of a honeycomb-type support channel due to the stickiness of SOF components.


Patent
Heesung Catalysts Corporation | Date: 2016-05-04

Disclosed herein is an ammonia oxidation catalyst for converting nitrogen oxides generated from a mobile source or fixed source into harmless nitrogen using ammonia as a reductant and preventing the formation of nitrogen oxides due to the oxidation of ammonia. The ammonia oxidation catalyst includes selective catalytic reductive zeolite sequentially impregnated with platinum and copper.

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