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Sulfur-tolerant non-noble metal catalyst and preparation method thereof

A non-precious metal and catalyst technology, which is applied in the field of non-precious metal catalyst preparation, can solve the problems of lowering, low melting point catalyst, loss of catalytic combustion treatment effect of organic waste gas, etc., and achieves the effect of low cost, simple method and high catalytic oxidation decomposition ability

Inactive Publication Date: 2018-05-25
南通斐腾新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Non-precious metals have a huge range of applications because of the easy availability of raw materials and low prices. However, due to their low melting point or easy combination with sulfur and deactivation, the catalyst is likely to reduce or even lose the catalytic combustion treatment effect on organic waste gas.

Method used

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  • Sulfur-tolerant non-noble metal catalyst and preparation method thereof
  • Sulfur-tolerant non-noble metal catalyst and preparation method thereof
  • Sulfur-tolerant non-noble metal catalyst and preparation method thereof

Examples

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Effect test

Embodiment 1

[0021] The preparation method of the present embodiment comprises the following steps:

[0022] A. Weigh a certain amount of Ce(NO 3 ) 3 •6H 2 O and Zr(NO 3 ) 3 • 5H 2 O was dissolved in distilled water, stirred and dissolved for 0.5 hours; then added the prepared NaOH-NH 3 •H 2 O precipitating agent, adjust the pH of the solution to 9; continue to age the solution at 80° C. for 2 hours with stirring to obtain a mixed solution A; the Ce / Zr molar ratio is: 1 / 5;

[0023] B. Add the configured Ag and Mn salt solution to the mixed solution A in step 1, and continue to stir for 0.5 to form a uniform solution B; the Ag / Mn metering ratio is 10:1, and the mass ratio of CeZr solid solution is 1% ;

[0024] C. Slowly add 0.1M precipitant under stirring condition to make the pH value of the system at 9, and then age at 60°C for 1 hour;

[0025] D. The powder obtained after the solution was filtered and dried by suction was immersed in an equal volume of transition metal salt sol...

Embodiment 2

[0029] The preparation method of the present embodiment comprises the following steps:

[0030] A. Weigh a certain amount of Ce(NO 3 ) 3 •6H 2 O and Zr(NO 3 ) 3 • 5H 2 O was dissolved in distilled water, stirred and dissolved for 3 hours; then added the prepared NaOH-NH 3 •H 2 O precipitating agent, adjust the solution pH=14; continue to place the solution at 120° C. for 5 hours under agitation to age to obtain a mixed solution A; the Ce / Zr molar ratio is: 4 / 1;

[0031] B. Add the configured Ag and Mn salt solution to the mixed solution A of step 1, and continue to stir for 3 hours to form a uniform solution B; the Ag / Mn metering ratio is 1:8, and the mass ratio of CeZr solid solution is 4 %;

[0032] C. Slowly add 0.1M precipitant under stirring condition to make the pH value of the system at 14, and then age at 150°C for 5 hours;

[0033] D. The powder obtained after the solution was filtered and dried by suction was immersed in an equal volume of transition metal s...

Embodiment 3

[0037] The preparation method of the present embodiment comprises the following steps:

[0038] A. Weigh a certain amount of Ce(NO 3 ) 3 •6H 2 O and Zr(NO 3 ) 3 • 5H 2 O was dissolved in distilled water, stirred and dissolved for 1 hour; then added the prepared NaOH-NH 3 •H 2 O precipitating agent, adjust the solution pH=10; continue to place the solution at 90° C. for 3 hours under agitation to age to obtain a mixed solution A; the Ce / Zr molar ratio is: 4 / 1;

[0039]B. Add the configured Ag and Mn salt solution to step 1 mixed solution A, and continue to stir for 1 hour to form a uniform solution B; the Ag / Mn metering ratio is 10:1, and the mass ratio of CeZr solid solution is 5 %;

[0040] C. Slowly add 0.1M precipitant under stirring condition to make the pH value of the system at 11, and then age at 80°C for 2 hours;

[0041] D. The powder obtained after the solution was filtered and dried with suction was immersed in an equal volume of transition metal salt solut...

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Abstract

The invention discloses a sulfur-tolerant non-noble metal catalyst and a preparation method thereof. The preparation method comprises the following steps of dissolving a silver source and a manganesesource in a certain metric ratio in secondary water, adding a cerium-zirconium solid solution, and preparing to obtain an initial catalyst A with a VOC (Volatile Organic Compound) treatment capacity by adopting a deposition-precipitation method; afterwards, immersing the A in a small amount of solution of one or more of a lanthanum salt, a strontium salt, a molybdenum salt, a manganese salt, a barium salt, a calcium salt, a copper salt, a cobalt salt and an iron salt, and roasting at a high temperature to obtain the sulfur-tolerant non-noble metal catalyst. The method provided by the inventionis simple and convenient; further, the sulfur-tolerant non-noble metal catalyst does not contain a noble metal element and is low in cost; through introducing a transition metal salt with favorable tolerance to sulfur, a competitive adsorption site is formed on the surface of the catalyst, and the active catalyst is enabled to show a better sulfur-tolerant property.

Description

technical field [0001] The invention relates to the technical field of preparation of non-noble metal catalysts, in particular to a sulfur-resistant non-noble metal catalyst and a preparation method thereof. Background technique [0002] Volatile organic compounds (VOCs) are causing more and more serious damage to the environment and human health. The catalytic combustion method can burn VOCs at a lower temperature without flames and finally convert them into CO 2 and H 2 O and other harmless substances are currently the safest and most widely used VOCs purification technology. At present, catalysts for VOCs treatment mainly include noble metals (Pd, Pt, Ru, etc.), transition metals (Cu, Mn, Mo, Ni, Co, Fe, Cr, etc.), rare earth metals (Ce, La, etc.) and other composite oxides. . Due to factors such as high price, noble metal catalysts restrict their wider application, and other types of catalysts have not been fully used due to the common defects of poor poisoning resis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01D53/86F23G7/07B01D53/72B01D53/44
CPCB01J23/8986B01D53/8668B01D53/8687B01D2255/104B01D2255/2042B01D2255/2063B01D2255/2065B01D2255/20715B01D2255/2073B01D2255/20738B01D2255/20746B01D2255/20761B01D2255/20769B01D2257/708B01J23/8993F23G7/07F23G2209/14
Inventor 邱雁强吴子豹王斐
Owner 南通斐腾新材料科技有限公司
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