Preparation method and application of catalyst PdGaX/Ga2O3 catalyst used for selective hydrogenation of acetylene

A catalyst and selective technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of low ethylene selectivity and high price of palladium, and achieve the goal of preparation The method is simple, the performance is excellent, and the effect of selectivity is obvious

Inactive Publication Date: 2020-03-31
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high price of palladium and the low selectivity to ethylene, it is necessary to introduce a second component for regulation

Method used

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  • Preparation method and application of catalyst PdGaX/Ga2O3 catalyst used for selective hydrogenation of acetylene
  • Preparation method and application of catalyst PdGaX/Ga2O3 catalyst used for selective hydrogenation of acetylene
  • Preparation method and application of catalyst PdGaX/Ga2O3 catalyst used for selective hydrogenation of acetylene

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Experimental program
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Embodiment 1

[0031] This embodiment prepares PdGa X / Ga 2 o 3 The catalyst process is as follows:

[0032] 1. Synthesis and preparation of Ga by hydrothermal method 2 o 3For the nanorod carrier, dissolve sodium dodecylbenzenesulfonate in water, and stir vigorously until the mixture is uniform. Gallium nitrate hydrate was added thereto under stirring condition, the solution became cloudy, and after stirring for a period of time, large flocs appeared. Afterwards, sodium hydroxide solution (0.1 mol / L) was added dropwise to the mixed solution to adjust the pH to 8 to obtain a flocculent colloidal solution. Put the colloid solution in a closed container at 140°C for more than 8 hours by hydrothermal method. Centrifuge, wash with water to get white powder, after calcination at 500℃, get Ga 2 o 3 The nanorod carrier, the gallium oxide nanorod carrier has a diameter of 20-100 nm, and the gallium oxide nano-particles in the catalyst have a particle diameter of 4-10 nm.

[0033] 2. Immersio...

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Abstract

The invention discloses a preparation method and an application of a PdGaX / Ga2O3 catalyst used for selective hydrogenation of acetylene, and belongs to the technical field of gas phase catalysis withsupported catalyst. The method includes: performing hydrothermal synthesis to prepare a gallium oxide supporter and performing impregnation to support palladium particles onto the gallium oxide supporter, wherein by regulating pretreatment temperature of hydrogen, the permeating doping of gallium atoms in the supporter into the palladium nanoparticles is achieved; then performing reaction performance test of selective hydrogenation of acetylene. A result proves that the Pd2Ga structure, formed in the hydrogen pretreatment, has excellent reaction activity and ethylene selectivity. The syntheticmethod can achieve controllable regulation on the nanoparticles by means of the pretreatment temperature and atmosphere. The catalyst has simple preparation process and excellent performance.

Description

technical field [0001] The invention relates to the technical field of supported nanoparticle catalysts, in particular to a method for preparing an acetylene selective hydrogenation catalyst. The method provides a measure for regulating the nanoparticle structure through a metal oxide carrier. Background technique [0002] The petroleum cracking industry produces a large number of chemical raw materials, among which ethylene is widely used, and polyethylene products of various structures and specifications can be produced through the polymerization of ethylene. However, the ethylene obtained by petroleum cracking will contain a small amount of acetylene (0.5% to 2%), and these small amounts of acetylene will poison and deactivate the Ziegler-Natta catalyst that catalyzes ethylene polymerization, seriously affecting the quality of ethylene feed gas. Therefore, it is necessary to remove trace amounts of acetylene in the ethylene atmosphere and reduce the acetylene content to &...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/62B01J37/18C07C5/09C07C11/04
CPCB01J23/62B01J37/18C07C5/09C07C2523/62C07C11/04Y02P20/52
Inventor 张炳森王永钊牛一鸣
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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