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Platinum catalyst and preparation method and application thereof

A platinum catalyst and catalytic oxidation technology, applied in the field of catalysis, can solve the problems of low ethylene treatment efficiency, complicated preparation process of platinum catalyst, and high use cost, and achieve the effects of low cost, high atom utilization rate, and no pollution.

Pending Publication Date: 2022-05-06
INST OF CHEM ENG GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the content of active components in platinum (Pt) catalysts used to remove ethylene at low temperature is often high, resulting in high cost of use, and there are also problems such as low efficiency in processing ethylene and complicated preparation process of platinum catalysts.

Method used

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  • Platinum catalyst and preparation method and application thereof
  • Platinum catalyst and preparation method and application thereof
  • Platinum catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] A kind of platinum catalyst, its preparation method comprises the steps:

[0055] 1) Slowly add 1,2-bis(trimethoxysilyl)ethane (BTME) dropwise to octadecyltrimethylammonium chloride (ODTMACl), sodium hydroxide (NaOH) and water (H 2 O) obtain mixed solution, wherein, the mol ratio of various raw materials is BTME:ODTMA:NaOH:H 2 O=1:0.12:1:231;

[0056] 2) After the mixed solution was stirred at room temperature for 24 hours, it was filtered, washed and dried to obtain a white solid; 1g of the white solid was added to 150mL of ethanol solution containing 3.8g of HCl solution (36wt.%), and the magnetic stirring was continued at 50°C After 6 hours, wash with ethanol and deionized water, filter, remove the surfactant, and finally dry at 80°C for 6 hours to obtain the HMM-1 carrier (referred to as HMM-1);

[0057] 3) Weigh 1g of HMM-1 carrier into a 100mL eggplant-shaped bottle, add the precursor salt H 2 PtCl 6 ·6H 2 O (the total mass of precious metals accounts for 1%,...

Embodiment 2

[0061] A kind of platinum catalyst, its preparation method comprises the steps:

[0062] 1) Weigh 1g of HMM-1 carrier into a 100mL eggplant-shaped bottle, add precursor salt H 2 PtCl 6 ·6H 2 O (the total mass of precious metals is 1%, that is, the amount of precious metals is 1% of the mass of the HMM-1 carrier) and 50mL of deionized water, at a temperature of 25°C, set the ultrasonic power to 30W, and ultrasonically for 1h to obtain a platinum precursor suspension;

[0063] 2) The platinum precursor suspension was subjected to rotary evaporation, and then vacuum-dried at 50° C. for 12 hours to obtain a powder containing the precursor;

[0064] 3) Place the powder containing the precursor in 5% H 2 and N 2 Reduction at 200°C for 2 hours under the condition of mixed gas to obtain a platinum catalyst (denoted as Pt / HMM-1-2).

Embodiment 3

[0066] A preparation method for a platinum catalyst, comprising the steps of:

[0067] 1) Weigh 1g of HMM-1 carrier into a 100mL eggplant-shaped bottle, add precursor salt H 2 PtCl 6 ·6H 2 O (the total mass of precious metals is 1%, that is, the amount of precious metals is 1% of the mass of the HMM-1 carrier) and 50mL of deionized water. At a temperature of 25°C, set the ultrasonic power to 40W and ultrasonically for 1h to obtain a platinum precursor. suspension;

[0068] 2) The platinum precursor suspension was subjected to rotary evaporation, and then vacuum-dried at 50° C. for 12 hours to obtain a powder containing the precursor;

[0069] 3) Place the powder containing the precursor in 5% H 2 and N 2 Reduction at 200°C for 2 hours under the condition of mixed gas to obtain a platinum catalyst (denoted as Pt / HMM-1-3).

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Abstract

The invention discloses a platinum catalyst and a preparation method and application thereof. The platinum catalyst comprises platinum nanoparticles and a carrier, the platinum nanoparticles are uniformly loaded on the surface of the carrier, and the platinum loading capacity on the platinum catalyst is lower than 1.0 wt.%. The preparation method of the platinum catalyst comprises the following steps: dipping a carrier in a platinum precursor solution, carrying out ultrasonic treatment, removing a solvent, and carrying out reduction treatment in a protective atmosphere to obtain the platinum catalyst. The catalyst is low in precious metal platinum content, good in dispersity, capable of providing higher catalytic activity and better catalytic stability, easy to prepare, low in cost, low in energy consumption, free of pollution, short in time and wide in application prospect.

Description

technical field [0001] The invention relates to the technical field of catalysis, in particular to a platinum catalyst and its preparation method and application. Background technique [0002] Ethylene is a common natural "ripening" hormone, which can produce a ripening effect on fruits at very low concentrations (0.01-0.1ppm), resulting in accelerated aging and decay of fruits, which is not conducive to the preservation and preservation of fruits and vegetables. Keep fresh. In order to facilitate the transportation of fruits and vegetables, improve the commodity value of fruits and vegetables, and promote farmers' income, it is urgent to study a simple technology that can remove ethylene at room temperature. [0003] At present, the content of active components in platinum (Pt) catalysts used to remove ethylene at low temperature is often high, resulting in high cost of use, and there are also problems such as low efficiency of processing ethylene and complicated preparati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J23/63B01D53/86B01D53/72
CPCB01J23/42B01J23/63B01D53/8668B01J35/399B01J35/393B01J35/23
Inventor 江川霞杨宗美陈佳志王飞
Owner INST OF CHEM ENG GUANGDONG ACAD OF SCI
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