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Three-dimensionally ordered macroporous gold-loaded catalyst with composite oxide as carrier and for catalytic combustion

An oxidation catalyst, three-dimensional ordered technology, applied in metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, chemical/physical process, etc. high effect

Active Publication Date: 2011-03-02
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have their own characteristics, but there are certain shortcomings in the preparation of three-dimensional ordered macroporous cerium-based oxide carrier-supported gold catalysts.

Method used

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  • Three-dimensionally ordered macroporous gold-loaded catalyst with composite oxide as carrier and for catalytic combustion
  • Three-dimensionally ordered macroporous gold-loaded catalyst with composite oxide as carrier and for catalytic combustion
  • Three-dimensionally ordered macroporous gold-loaded catalyst with composite oxide as carrier and for catalytic combustion

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Experimental program
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Effect test

preparation example Construction

[0062] Preparation method of three-dimensional ordered macroporous cerium-based oxide carrier:

[0063] 1) Preparation of monodisperse polymer microspheres by soap-free emulsion polymerization

[0064] Add 50mL of acetone and 150mL of double-distilled water into a 1000mL four-neck flask, preheat it to 70°C with a 70°C water bath, and add 70mL of monomeric methyl methacrylate (or styrene) into the preheated four-neck flask In; while preheating reactant, weigh 0.090g potassium persulfate and 0.1538g azobisisobutyronitrile (AIBN), dissolve with 150mL water, obtain initiator aqueous solution, water bath is heated to 70 ℃; When preheating to 70°C, add an aqueous initiator solution at 70°C, and continue stirring for 2-10 hours to obtain a monodisperse polymethyl methacrylate (or polystyrene) microsphere emulsion with a solid content of 5-10%;

[0065] 2) Preparation of colloidal crystal templates by centrifugal deposition or evaporation deposition

[0066] Place an appropriate amo...

Embodiment 13D

[0071] Example 13 DOM Au x / LaFeO 3 catalyst

[0072] The precursor salt HAuCl with a concentration of 12.12mmol / L 4 aqueous solution with 0.5 g of 3DOMLaFeO 3 Mixing (the loading of Au is controlled to be 0.5-8wt%), while adding the stabilizer PVP with a concentration of 1.2mol / L (the addition amount is the same as that of HAuCl 4 The aqueous solution is the same), and the aqueous solution of the precursor salt of Au is obtained. The ratio of different raw materials is shown in Table 1.

[0073] The aqueous solution of the prepared Au precursor salt enters the membrane reactor under the action of the peristaltic pump, and at the same time starts the hydrogen input device, and the hydrogen diffuses out of the membrane tube through the 40nm micropores on the two ceramic membrane tubes, generating a large amount of Hydrogen bubbles promote the mixing of the carrier and the solution, and the hydrogen flow rate is 50mL / min.

[0074] NaBH 4 According to the predetermined sto...

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Abstract

The invention relates to a macroporous noble metal-loaded catalyst with metal oxide as a carrier and for purifying soot exhausted by diesel and a preparation method thereof. The invention firstly provides an oxidation catalyst for combustion of soot particles exhausted by diesel vehicles. The catalyst is obtained by taking the simple metal oxide or composite metal oxide which contains more than one of rare earth metals, transition metals and alkaline metals and has three-dimensionally ordered macroporous structure as a carrier and loading the noble metal active ingredient, wherein the simple metal oxide is any one of metallic elements; the composite metal oxide is perovskite or perovskite-like composite metal oxide; the noble metal active ingredient is gold; and the mean size of the macropores in the carrier is 50nm-1mu m. The catalyst conduces to diffusion of the soot particles in the pore canal, improves the use ratio of the active surface area and greatly reduces the combustion temperature of the soot particles. The invention also provides the preparation method of the catalyst.

Description

technical field [0001] The invention relates to a technology for purifying soot particles from diesel vehicles, in particular to a gold-carrying catalyst for three-dimensional ordered macroporous composite oxides for catalytic combustion and a preparation method thereof, belonging to the technical field of environmental protection. Background technique [0002] Improving the activity of the catalyst for purifying soot particulate matter (PM) from diesel vehicle exhaust, reducing the combustion temperature of soot particulate matter, so that the soot particulate matter trap can work continuously for a long time is the most direct way to reduce the soot particulate matter emitted by diesel engines method. Since the elimination reaction of soot is a gas-solid (soot)-solid (catalyst) three-phase complex deep oxidation reaction process, the improvement of catalyst activity is not only closely related to the redox performance of the oxide catalyst itself, but also to the solid Th...

Claims

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Application Information

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IPC IPC(8): B01J23/52B01J23/89B01D53/94
Inventor 刘坚赵震韦岳长段爱军姜桂元徐春明
Owner BC P INC CHINA NAT PETROLEUM CORP
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