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Copper-zinc-cerium-based catalyst for low-temperature deep removal of carbon monoxide and preparation method and application of catalyst

A cerium-based catalyst and carbon monoxide technology, which is applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problem of unclear service life of adsorbed substances and no clear activation method To achieve the effect of improving the ability to capture or release surface lattice oxygen, improve the reduction and oxidation performance, and improve the adsorption capacity

Inactive Publication Date: 2015-04-01
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] CN1681583A and US2005 / 0241478 disclose a copper-zinc-zirconium adsorption material to remove carbon monoxide from the material flow. The adsorption material can only remove carbon monoxide by adsorption. More importantly, there are no examples to clarify the reaction conditions and the removal of trace CO. In addition to the depth, the service life of the adsorbent is not clear, etc.
However, what is disclosed is the preparation of the catalyst precursor, and there is no clear and suitable activation method, which is an essential key technology in the preparation of this type of catalyst

Method used

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  • Copper-zinc-cerium-based catalyst for low-temperature deep removal of carbon monoxide and preparation method and application of catalyst
  • Copper-zinc-cerium-based catalyst for low-temperature deep removal of carbon monoxide and preparation method and application of catalyst
  • Copper-zinc-cerium-based catalyst for low-temperature deep removal of carbon monoxide and preparation method and application of catalyst

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Experimental program
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Effect test

Embodiment 1～5

[0058] Preparation of CuZnCerium-Based Catalyst Precursor

[0059] Using different CuO:ZnO:CeO 2 Proportioning, raw materials are weighed, and the specific component contents are shown in Table 1 in terms of weight percentage.

[0060] After preparing the nitrate of Cu, Zn, Ce metal into a certain concentration of solution, mix well under full stirring; the molar ratio of nitrate solution and alkali solution is 1:1; Co-precipitate with alkali solution under stirring, the precipitation temperature is 60-80°C; after the precipitation is completed, adjust the pH value of the system to 6-7; age the obtained catalyst precursor at a certain temperature, and fully stir; take out the solid product, After repeated washing and centrifugation with deionized water at a certain temperature, place in a drying oven to dry at 100-120°C for 12 hours; roast at 350-550°C for 6.0 hours, and cool to room temperature to obtain the copper-zinc-cerium-based catalyst product;

Embodiment 2

[0079] The activation of embodiment 2, embodiment 3 catalyst

[0080] After granulating, tableting, and crushing the catalyst obtained in Implementation 2, select 60-80 mesh catalyst particles for activation. A stainless steel tube fixed bed reaction device was used for activation, and the catalyst prepared in Example 2 was reductively activated. The process conditions used for activation were: catalyst loading 3mL, temperature 120°C, normal pressure, activation time 2h, reducing gas 10 %H 2 / N 2 , the volume space velocity is 4000h -1 . A catalyst with a reduction degree of 77% was obtained, designated as Example 6.

Embodiment 3

[0081] The activation method of embodiment 3 catalyst is with embodiment 9, obtains catalyst, is marked as embodiment 7.

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Abstract

The invention relates to a copper-zinc-cerium-based catalyst for low-temperature deep removal of carbon monoxide and a preparation method and application of the catalyst. The catalyst comprises the following components: 10wt% to 95wt% of a main component, CuO, 1wt% to 85wt% of a second component, ZnO, 1wt% to 85wt% of a third component, CeO2, and 0.0 to 40wt% of a fourth component, an oxide of metal M, wherein M is one or more selected from Zr, Mn, Mg, Fe, La, Pr, Nd and Sm. The copper-zinc-cerium-based catalyst for low-temperature deep removal of carbon monoxide is prepared by the coprecipitation method. Compared with the prior art, the catalyst has the advantages that low-price rare earth elements are fully utilized, the preparation cost of the catalyst is obviously reduced, the oxygen storage and release capacity of the rare earth elements is utilized, the reducing property of the catalyst is improved, and the low-temperature activity of the catalyst is enhanced. Compared with the prior art, the catalyst provided by the invention has the characteristics of high activity at low temperature (0 to 50 DEG C), high removal depth (less than or equal to 10ppb), good stability, long service life and simple preparation process.

Description

technical field [0001] The invention relates to a copper-zinc-cerium-based catalyst for deep removal of carbon monoxide at low temperature, in particular to a copper-zinc-cerium-based catalyst for deep removal of carbon monoxide at low temperature, a preparation method thereof, and an application in low-temperature deep removal of CO. Background technique [0002] In various industrial fields, the presence of trace carbon monoxide is often harmful to the reaction system and needs to be removed as an impurity. With the development of polyolefin technology, highly active polyolefin catalysts are very sensitive to poisons, and polyolefin raw materials are required to be "polymerization grade" olefins. Specifically, the carbon monoxide impurity in olefin raw materials does not exceed 30ppb. Typical is the propylene polymerization process. With the development of propylene polymerization catalysts, the polymerization reaction is extremely sensitive to various impurities in the re...

Claims

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Application Information

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IPC IPC(8): B01J23/83C07C11/06C07C7/12
CPCY02P20/52
Inventor 叶丽萍黄金花顾慧劼李帅李建龙罗勇吴向阳杨丙星
Owner SHANGHAI RES INST OF CHEM IND
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