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Catalyst for CO2 decomposition and preparantion process thereof

A catalyst, supported catalyst technology, applied in separation methods, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as low industrial application value

Active Publication Date: 2008-02-13
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above catalysts mainly make CO 2 directly decomposed into C and O 2 , only very little CO can be obtained, so its industrial application value is not great

Method used

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  • Catalyst for CO2 decomposition and preparantion process thereof
  • Catalyst for CO2 decomposition and preparantion process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of Catalyst Pd / SrCo of the Invention by Equal Volume Impregnation Method 0.4 Fe 0.5 Zr 0.1 o 3-δ

[0019] Follow these steps:

[0020] (1) Weigh 0.6685g of PdCl 2 In a beaker, add excess ammonia water (about 10mL) to the beaker while stirring until the metal salt is completely dissolved to prepare the corresponding complex solution as the impregnating solution;

[0021] (2) Then add 7.6g of carrier perovskite mixed conductor (SrCo 0.4 Fe 0.5 Zr 0.1 o 3-δ , where δ represents the number of oxygen lattice vacancies) powder impregnation for 30min;

[0022] (3) Aging at room temperature for 60 minutes, drying at 120°C for 6 hours, then roasting at 500°C for 5 hours, grinding and sieving to obtain a 300-mesh catalyst, wherein the weight content of the active component Pd is 5%.

Embodiment 2

[0024] Catalyst Pd / SrCo 0.4 Fe 0.5 Zr 0.1 o 3-δ to CO 2 Experiment of catalytic activation effect:

[0025] In the reactor shown in Figure 4 is equipped with SrCo 0.4 Fe 0.5 Zr 0.1 o 3-δ Oxygen permeable membrane (1), the upper side of this oxygen permeable membrane is equipped with the present invention Pd / SrCo 0.4 Fe 0.5 Zr 0.1 o 3-δ Catalyst (2). Carbon dioxide is passed into the reactor from the upper side at an intake rate of 4ml / min, and at the same time diluted with 26ml / min of helium; the permeation side uses helium as a sweeping gas, and the intake rate of helium is controlled at 30ml / min. The on-line detection of decomposition products by gas chromatography is shown in Figure 3. In Figure 3, the characteristic peak of CO appeared at 7.034min, proving that CO was generated. At the reaction temperatures of 950°C, 900°C, 850°C, and 800°C, the catalytic activation of CO by the catalyst was investigated. 2 The results are shown in Figure 1.

[0026] As can...

Embodiment 3

[0028] Catalyst Pd / SrCo 0.4 Fe 0.5 Zr 0.1 o 3-δ to CO 2 Stability test of catalytic activity

[0029] at SrCo 0.4 Fe 0.5 Zr 0.1 o 3-δ In the oxygen-permeable membrane reactor, the experimental conditions were the same as in Example 1, and the stability time of the catalytic activity of the catalyst was investigated at 950° C., and the results are shown in FIG. 2 .

[0030] It can be seen from Figure 2 that after the catalytic activity of the catalyst was stable for 20 hours, the CO 2 The decomposition rate has decreased, but its catalytic effect is still obvious. The results show that the catalytic activity of the catalyst can be maintained for more than 20 hours.

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Abstract

A CO2-decomposing catalyst for decomposing CO2 to obtain CO and O2 is composed of the carrier which is an O2 permeable film with oxygen holes and high-temp stability and the active component chosen from Pd, Cu, Ni, Fe, Pt and their alloy. Its preparing process includes such steps as immersing powdered carrier in the complex of active metal salt and ammonia water, ageing, drying, calcination, grinding and sieve.

Description

technical field [0001] The present invention relates to a method for CO 2 Catalyst for decomposition reaction and its preparation method. Background technique [0002] As we all know, carbon dioxide is a gas with extremely stable molecular structure, and its decomposition reaction conditions are harsh. Although it can be decomposed to produce pure oxygen, carbon and carbon monoxide under high temperature and the presence of a catalyst, the reaction is limited by the balance of chemical reactions, and the conversion rate of carbon dioxide is low. . In recent years, with the development of industry, energy issues and environmental issues have become more and more prominent, so CO 2 The utilization of resources has gradually become a research hotspot, and people try to make CO with a wide range of sources 2 A large amount of CO and O are obtained through decomposition reactions 2 as available energy. This technology has made some progress in the research of space science. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/40B01J23/70B01J23/89B01D53/62C01B31/18C01B32/40
Inventor 徐南平金万勤张春常先锋
Owner NANJING TECH UNIV
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