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Low cost oxidation catalysts for VOC and halogenated VOC emission control

An oxidation catalyst, tin oxide technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, catalyst activation/preparation, etc. and low-cost application improvements

Inactive Publication Date: 2018-08-28
CLARIANT INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although catalytic oxidation is considered a viable route, the use of expensive noble metal catalysts such as platinum and palladium limits economic savings, and low-cost catalysts with similar efficiencies are desired
In addition, catalysts previously used for these purposes were sometimes more costly, so there is a need for catalysts that offer longer lifetimes and lower costs

Method used

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  • Low cost oxidation catalysts for VOC and halogenated VOC emission control
  • Low cost oxidation catalysts for VOC and halogenated VOC emission control
  • Low cost oxidation catalysts for VOC and halogenated VOC emission control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Through the solid solution of ceria-zirconia powder (see figure 1 ) and silica in a 5:1 ratio with sufficient deionized water to prepare a washcoat slurry. Ceria-zirconia powder has about 85m 2 / g surface area. Once mixed, the slurry is ground to the desired particle size. A ceramic monolithic substrate having a pore density of 400 cpsi was partially dipped into the washcoat slurry. Excess slurry was removed using an air knife. The coated part was dried at about 150°C and calcined at about 500°C to give a part with a washcoat loading of about 170 g / L. On the coated part, a ruthenium nitrate solution was deposited by wet dipping, dried at 150°C and calcined at 500°C to achieve a ruthenium loading of about 2.8 g / L measured by known techniques.

Embodiment 2

[0037] Use silica-stabilized titanium dioxide powder (with about 85m 2 surface area per gram), colloidal silica, and a sufficient amount of deionized water, and then grind the mixture to the desired particle size to prepare a washcoat slurry. A 400 cpsi monolithic substrate was then partially dipped into the washcoat slurry. Excess slurry was removed using an air knife. The coated part was dried at 150°C and calcined at 500°C. The resulting fraction had a washcoat loading of about 180 g / L. On the coated part, a ruthenium nitrate solution was deposited by wet dipping, dried at 150°C and calcined at 500°C to achieve a ruthenium loading of about 2.6 g / L.

Embodiment 3

[0039] Use silicon dioxide stabilized tin oxide powder (with about 110m 2 surface area per gram), colloidal silica, and a sufficient amount of water, and then grind the mixture to the desired particle size to prepare a washcoat slurry. A 400 cpsi monolithic substrate was partially dipped into the washcoat slurry. Remove excess slurry using vacuum suction or air knife. The coated part was dried at about 150°C and calcined at 500°C. This yielded a fraction with a washcoat loading of about 180 g / L. On the coated part, a ruthenium nitrate solution was deposited by wet dipping or other suitable technique, dried at 150°C and calcined at about 500°C to achieve a ruthenium loading of about 2.6 g / L.

[0040] The catalysts described in the above examples were evaluated for their catalytic activity. The reactivity was tested on a laboratory scale reactor based on core samples of the catalyst cut from the catalyst monolith sections of each of the above examples. The hazardous compoun...

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Abstract

The current embodiments relate to ruthenium-containing supported catalysts, including processes for their manufacture and use, which destroy, through catalytic oxidation, hazardous compounds containedin chemical industrial emissions and otherwise produced from industrial processes.

Description

[0001] related application [0002] This application claims the benefit of priority to U.S. Provisional Application No. 62 / 458,695, filed February 14, 2017, the entire contents of which are hereby incorporated by reference. technical field [0003] Embodiments of the present invention relate to supported ruthenium-containing catalysts, including their methods of manufacture and uses, for the destruction of noxious compounds contained in chemical industry effluents and otherwise produced by industrial processes by catalytic oxidation. Background technique [0004] Many hazardous compounds are found in tail and / or exhaust emissions of chemical, fuel consumption and industrial processes. These can originate from industrial waste gases as well as off-gas emissions from chemical plants, including purified terephthalic acid (PTA) plants. Hazardous compounds found in various emissions can be in the form of chemical by-products and solvents. Likewise, hazardous compounds, includi...

Claims

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Application Information

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IPC IPC(8): B01J23/63B01D53/62B01D53/86B01D53/72B01D53/70
CPCB01D53/62B01D53/8662B01D53/8668B01J23/63B01D2257/502B01J23/462B01D53/864B01D2255/2061B01D2255/2063B01D2255/2065B01D2255/2066B01D2255/2068B01D2255/20707B01D2255/2094B01D2255/40B01D2255/407B01D2257/2062B01D2257/7027B01D2255/1026B01D2257/708B01D2255/1021B01J23/626B01J23/10B01J21/066B01J21/08B01J21/063B01J21/04B01J37/023B01J2523/821B01J2523/828Y02A50/20B01J35/56
Inventor 党中远G·库伦
Owner CLARIANT INT LTD
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