Precious metal single-atom dispersion type cleaning catalyst and preparation method thereof

A technology for purifying catalyst and atomic dispersion, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc., can solve the problems of harsh reaction conditions, high cost, disadvantage, etc. Achieve the effect of reducing production cost, reducing usage, and improving dehydrogenation performance

Active Publication Date: 2019-03-08
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] There are many similar catalyst preparation or regeneration technologies, but these methods are complex in process, relatively harsh in reaction conditions, relatively cumbersome in production operation, and high in cost, and are ...

Method used

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  • Precious metal single-atom dispersion type cleaning catalyst and preparation method thereof
  • Precious metal single-atom dispersion type cleaning catalyst and preparation method thereof
  • Precious metal single-atom dispersion type cleaning catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A noble metal single-atom dispersed purification catalyst, including components and mass percentage: 99.9% TiO 2 Support with 0.1% Pt for H removal in high concentration CO gas 2 , where TiO 2 The particle size of the carrier is 20-30nm. In this catalyst, Pt is in TiO 2 The carrier presents a monoatomic dispersion state.

[0054] The preparation method of the noble metal single-atom dispersed purification catalyst comprises the following steps:

[0055] In a vacuum glove box, 136.12 g of tetrabutyl titanate was weighed and diluted to 200 mL with absolute ethanol. Weigh 0.2g of chloroplatinic acid (molecular formula is H 2 PtCl 6 ·6H 2 O), magnetic stirring was dissolved in the ethanol solution (hereinafter referred to as the solution A0 solution). Another 200 mL of 0.1 M ammonium carbonate solution was prepared, and the pH was adjusted to 8 using a small amount of hydrochloric acid (hereinafter this solution is referred to as B0 solution). The A0 solution was pl...

Embodiment 2

[0057] A noble metal single-atom dispersed purification catalyst, including components and mass percentages: 99.5% TiO 2 Support with 0.5% Pt for H removal in high concentration CO gas 2 , where TiO 2 The particle size of the carrier is 20-30nm. In this catalyst, Pt is in TiO 2 The carrier presents a monoatomic dispersion state.

[0058] The preparation method of the noble metal single-atom dispersed purification catalyst comprises the following steps:

[0059] In a vacuum glove box, 136.12 g of tetrabutyl titanate was weighed and diluted to 200 mL with absolute ethanol. Weigh 1g of chloroplatinic acid (molecular formula is H 2 PtCl 6 ·6H 2 O), magnetic stirring is dissolved in this ethanol solution (hereinafter referred to as this solution is A solution). Another 200 mL of 0.1 M ammonium carbonate solution was prepared, and the pH was adjusted to 8 with a small amount of hydrochloric acid (hereinafter this solution is referred to as solution B). Place A solution in a ...

Embodiment 3

[0073] A noble metal single-atom dispersed purification catalyst, including components and mass percentage: 98.2% TiO 2 Support with 1.8% Pd for removal of H in high concentration CO gas 2 , where TiO 2 The particle size of the carrier is 20-30nm. In this catalyst, Pd is in TiO 2 The carrier presents a monoatomic dispersion state.

[0074] The preparation method of the noble metal single-atom dispersed purification catalyst comprises the following steps:

[0075] In a vacuum glove box, weigh 85.08g of tetrabutyl titanate, and use absolute ethanol to dilute to 200mL, weigh 1g of palladium tetrachloride (molecular formula is PdCl 4 ), magnetically stirred and dissolved in the ethanol solution (hereinafter referred to as the solution A2 solution).

[0076] Another 200 mL of 0.1 M ammonium carbonate solution was prepared, and the pH was adjusted to 8 with a small amount of hydrochloric acid (hereinafter this solution is referred to as B2 solution). The A2 solution was placed ...

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Abstract

The invention discloses a precious metal single-atom dispersion type cleaning catalyst and a preparation method thereof. The catalyst comprises the following components in percentages by weight: 97% to 99.99% of a nano metal oxide carrier and 0.01% to 3% of a precious metal. The method comprises the following steps: taking the nano metal oxide carrier, dispersing the nano metal oxide carrier intoa precious metal salt solution to form a mixed solution, and using a coprecipitation method to generate a precursor of which the precious metal is loaded on the surface of the carrier; mixing the precursor and metal powder in the proportion of 1: (1 to 100), and carrying out calcinations to generate a precursor after heat treatment, and after washing and drying, obtaining the precious metal single-atom dispersion type cleaning catalyst. In the catalyst prepared by the method, the precious metal is in single-atom dispersion type, the method is low in processing method, simple in preparation technology and high in H2 removal rate and has extremely high stability, the catalyst cannot be inactivated after continuous application for 60 h, and the loss of CO is relatively small.

Description

Technical field: [0001] The invention belongs to the technical field of catalyst preparation, and specifically relates to a catalyst that can be stably used to remove H in high-concentration CO gas. 2 Catalyst materials, especially related to a noble metal such as Pt, Pd, etc., whose active substance is a high-loaded monoatomic dispersion, and the carrier is TiO 2 、Al 2 o 3 The preparation method of the transition metal oxide catalyst material. Background technique: [0002] Ethylene glycol is mainly used in the production of polyethylene terephthalate (PET), antifreeze, unsaturated polyester resin (UPR), lubricants, plasticizers, nonionic surfactants, explosives, etc., and has a wide range of uses At the same time, it is an important part of the polyester industry chain. At present, there are many production processes of ethylene glycol in the world. According to the different production raw materials, they can be divided into two types, namely, ethylene production and ...

Claims

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Application Information

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IPC IPC(8): B01J23/42B01J23/44B01J37/03C01B32/40
CPCB01J23/42B01J23/44B01J35/0013B01J35/006B01J35/0093B01J37/033B01J37/035C01B32/40
Inventor 秦高梧李松饶毅
Owner NORTHEASTERN UNIV
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