Templated catalyst composition and associated method

a catalyst and composition technology, applied in the field of catalyst composition, can solve the problems of poor nox reduction with concomitant carbon deposition, unsatisfactory reaction kinetics,

Inactive Publication Date: 2010-08-05
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This type of reaction may not have desirable kinetics.
However, reductants containing aromatics like those present in Diesel fuel, lead to poor NOx reduction with concomitant carbon deposition.

Method used

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  • Templated catalyst composition and associated method
  • Templated catalyst composition and associated method
  • Templated catalyst composition and associated method

Examples

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examples

Preparation of Material

[0043]Templated alumina is produced as follows, for example. Solution 1 is formed by combining ethylaetoacetate (26.5 g, 0.2 mol), TRITON X-114 (85g, ca. 0.15 mol) and 2-butanol (500 mL) in a 5-L, 3-neck flask equipped with an addition funnel, a condenser, and a mechanical stirrer. Solution 2 is composed of Al(O-secBu)3 (500 g, 2 mol) and 2-BuOH (2 L). Solution 3 is composed of water (75 mL, 4 mol) and 2-BuOH (850 mL).

[0044]Solution 2 is added to Solution 1 while stirring, and is held at ambient temperature for 30 min. Solution 3 is added to solutions 1 and 2 via an addition funnel over about 90 minutes. Mechanical stirring is continued at ambient temperature for 3 hours and then the contents are heated to about reflux for about 20 to about 24 hours.

[0045]The contents are cooled and filtered on a #50 paper filter and washed with ethanol. The obtained white solid is dried in vacuo, in a vacuum oven at 80 degrees Celsius. The solid is subjected to Soxhlet extrac...

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Abstract

A composition includes a templated metal oxide substrate having a plurality of pores and a catalyst material includes silver. The composition under H2 at 30 degrees Celsius, the composition at a wavelength that is in a range of from about 350 nm to about 500 nm has a VIS-UV absorbance intensity that is at least 20 percent less than a standard silver alumina catalyst (Ag STD). The standard alumina is Norton alumina, and which has the same amount of silver by weight.

Description

BACKGROUND[0001]1. Technical Field[0002]The invention includes embodiments that relate to a catalyst composition. The invention includes embodiments that relate to a method of making the catalyst composition and a method of using the catalyst composition for reducing nitrogen oxides.[0003]2. Discussion of Art[0004]Currently, lean NOx traps may be used in exhaust gas treatment systems. In these, NOx reduction catalysts and methods include the alkali and alkali earth metal in the catalyst composition where the alkali metal or the alkali earth metal absorbs the NOx and then the reductant reduces NOx to nitrogen. This type of reaction may not have desirable kinetics.[0005]Silver-containing alumina is known for selective catalytic reduction (SCR) of NOx using linear hydrocarbon reductants. However, reductants containing aromatics like those present in Diesel fuel, lead to poor NOx reduction with concomitant carbon deposition.[0006]Therefore, it may be desirable to have a catalyst composi...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B01D53/56B01J23/50B01J21/04B01J21/08
CPCB01D53/9418B01D2255/104B01J23/50B01J35/002B01J37/036B01J37/0018B01J37/0201B01J37/033B01J35/023
Inventor LEWIS, LARRY NEILHANCU, DANSICLOVAN, OLTEA PUICAYIN, MING
Owner GENERAL ELECTRIC CO
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