Preparation method and application of Pd/modified bauxite catalyst

A bauxite and catalyst technology, applied in the field of nanomaterial catalysis, achieves the effects of low loading, obvious application value, and improved activity

Inactive Publication Date: 2011-12-28
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are no relevant patents and literature reports on the development of Pd-based carbon monoxide oxidation catalysts prepared with modified bauxite as a carrier and applied to carbon monoxide oxidation reactions.

Method used

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  • Preparation method and application of Pd/modified bauxite catalyst
  • Preparation method and application of Pd/modified bauxite catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The natural bauxite was heated at 130°C for 72 hours, dried at 80°C for 4 hours, and then roasted at 550°C for 4 hours to obtain a modified bauxite carrier with a high specific surface area; PdCl 2 Dissolved in 2 mol / L HCl solution to prepare H with a concentration of 0.03g / ml 2 PdCl 4 solution as an impregnation solution. At room temperature, measure 1.7ml H 2 PdCl 4 Solution, add deionized water to 4.2ml, measure 1.4ml H each time 2 PdCl 4 Solution, divided into three times, using equal volume impregnation method, impregnated 2g of modified bauxite carrier in H 2 PdCl 4 The solution was dried under an infrared lamp for 1 h and calcined at 450 °C for 2 h to prepare Pd / bauxite catalysts with palladium loadings of 1.5%.

[0029] The mass fraction of Pd is the application of the Pd / bauxite catalyst of 1.5%. Get the above-mentioned Pd / bauxite catalyst 0.10g with modified bauxite as the carrier and put it into the bottom of the thick tube of the U-shaped sample tube ...

Embodiment 2

[0034] The natural bauxite was heated at 170°C for 48 hours, dried at 90°C for 4 hours, and then roasted at 550°C for 2 hours to obtain a modified bauxite carrier with a high specific surface area; PdCl 2 Dissolved in 2 mol / L HCl solution to prepare H with a concentration of 0.03g / ml 2 PdCl 4 solution as an impregnation solution. At room temperature, measure 0.2ml H 2 PdCl 4 Solution, add deionized water to 4.2ml, measure 1.4ml H each time 2 PdCl 4 Solution, three times using the equal volume impregnation method, the modified 2g bauxite carrier was impregnated in H 2 PdCl 4 solution, dried under an infrared lamp, and calcined at 450 °C for 2 h to prepare Pd / bauxite catalysts with palladium loadings of 0.2%.

[0035] The mass fraction of Pd is the application of the Pd / bauxite catalyst of 0.2%. Get the above-mentioned Pd / bauxite catalyst 0.10g with modified bauxite as the carrier and insert it into the bottom of the thick tube of the U-shaped sample tube plugged with qua...

Embodiment 3

[0040] The natural bauxite was heated at 150°C for 60 hours, dried at 110°C for 4 hours, and then roasted at 550°C for 3 hours to obtain a modified bauxite carrier with a high specific surface area; PdCl 2 Dissolved in 2 mol / L HCl solution to prepare H with a concentration of 0.03g / ml 2 PdCl 4 solution as an impregnation solution. At room temperature, measure 3.4ml H 2 PdCl 4 Solution, add deionized water to 4.2ml, measure 1.4ml H each time 2 PdCl 4 Solution, divided into three times, using equal volume impregnation method, impregnated 2g of modified bauxite carrier in H 2 PdCl 4 solution, dried under an infrared lamp, and calcined at 450 °C for 2 h to prepare Pd / bauxite catalysts with palladium loadings of 3.0%.

[0041] The mass fraction of Pd is the application of the Pd / bauxite catalyst of 3.0%. Get the above-mentioned Pd / bauxite catalyst 0.10g with modified bauxite as the carrier and put it into the bottom of the thick tube of the U-shaped sample tube plugged with ...

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Abstract

The invention provides a preparation method and application of a Pd/modified bauxite catalyst. The preparation method comprises the following steps: carrying out hydrothermal treatment on natural bauxite at the temperature of 130-170 DEG C for 48-72 h, then drying at the temperature of 80-110 DEG C for 4 h, and roasting for 2-4 h at the temperature of 550-650 DEG C to obtain a modified bauxite carrier; at room temperature, dipping the modified bauxite carrier in H2PdCl4 solution (0.03 g/ml) with volumetric method, drying with an infrared lamp, and roasting for 2-6 h at the temperature of 450 DEG C to obtain the Pd/modified bauxite catalyst with different Pd loadings. According to the invention, the Pd/modified bauxite catalyst is used as the catalyst of a CO oxidation reaction, so that the invention has creativity. The preparation process is simple without discharging of waste water, and the catalyst can be synthesized in a great lot. The catalyst is applied in the CO oxidation reaction with low load capacity and high catalytic activity. The preparation method can greatly reduce production cost. The invention has a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial catalysis, and in particular relates to a preparation method of a Pd / modified bauxite catalyst and its application in a CO oxidation catalytic reaction. [0002] Background technique [0003] Low-temperature catalytic oxidation of CO is the most direct, simple, cheap and effective method and means to eliminate CO. 2 Lasers, CO gas detectors, indoor air purification, and the elimination of trace CO in confined spaces have shown broad application prospects. Supported catalysts with noble metals such as Pt, Pd, and Au as active components exhibit good activity and water resistance in the low-temperature oxidation of CO. At present, the research on palladium catalysts mainly focuses on improving the performance of the catalyst and reducing the cost. The following methods are mainly adopted: (1) adding rare earth elements or transition metal elements as additives: such as oxides of zirconium, ce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J32/00B01J37/02B01D53/86B01D53/62
CPCY02A50/20
Inventor 江莉龙曹彦宁魏可镁杨阳
Owner FUZHOU UNIV
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