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Catalyst for tail gas purification

A tail gas purification and catalyst technology, applied in the direction of physical/chemical process catalysts, catalyst activation/preparation, heterogeneous catalyst chemical elements, etc., can solve problems such as weak anti-sintering ability, small specific surface area, poor mechanical stability, etc., and achieve mutual Enhanced action, increased decomposition temperature, improved activity and thermal stability

Active Publication Date: 2017-12-08
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But CeO 2 The carrier has the disadvantages of poor mechanical stability, weak anti-sintering ability and small specific surface area

Method used

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  • Catalyst for tail gas purification
  • Catalyst for tail gas purification

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) 3.84g Ce(NO 3 ) 3 ·6H 2 O and 0.50g Pr(NO 3 ) 3 ·6H 2 Add 50mL of methanol to dissolve, so that the total concentration of cations is 0.2mol / L, then add 1.58g of n-decyl alcohol, fully stir to dissolve; then add dropwise 50mL, 0.2mol / L methanol solution of tetramethylammonium hydroxide , mixed evenly and left for 24 hours; the resulting precipitate was filtered, washed with methanol, and dispersed in tetrahydrofuran to obtain solution A;

[0023] 2) 0.1g Pd(NO 3 ) 3 2H 2 O was dissolved in 50 mL of deionized water, then 0.5 g of polyvinylpyrrolidone was added, and superfine Pd nanoparticle sol was obtained through ultrasonic reduction; the ultrasonic frequency was 20 kHz, the output power was 200 W, and the ultrasonic time was 90 min;

[0024] 3) At room temperature, add 50mL methanol and 1.21g L-cysteine ​​to the obtained Pd nanoparticle sol, stir and mix to obtain solution B;

[0025] 4) According to the volume ratio of 1:0.1, the obtained solution A was s...

Embodiment 2

[0028] 1) 7.00g Ce(NO 3 ) 3 ·6H 2 O and 1.68g Pr(NO 3 ) 3 ·6H 2 Add 100mL of methanol to dissolve, so that the total concentration of cations is 0.2mol / L, then add 3.16g of n-decyl alcohol, fully stir to dissolve; then add dropwise 100mL, 0.2mol / L methanol solution of tetramethylammonium hydroxide , mixed evenly and left for 24 hours; the resulting precipitate was filtered, washed with methanol, and dispersed in tetrahydrofuran to obtain solution A;

[0029] 2) 0.1g Pd(NO 3 ) 3 2H 2 O was dissolved in 50mL deionized water, then 0.5g polyethylene glycol was added, and superfine Pd nanoparticle sol was obtained by ultrasonic reduction; the ultrasonic frequency was 20kHz, the output power was 500W, and the ultrasonic time was 30min;

[0030] 3) At room temperature, add 50 mL of methanol and 2.18 g of 11-mercaptoundecanoic acid to the obtained Pd nanoparticle sol, and stir to obtain solution B;

[0031] 4) Slowly add the obtained solution A to the obtained solution B unde...

Embodiment 3

[0034] 1) 5.90g Ce(NO 3 ) 3 ·6H 2 O and 2.78g Pr(NO 3 ) 3 ·6H 2 Add 80mL of methanol to dissolve, so that the total concentration of cations is 0.2mol / L, then add 0.912g of ethylene glycol, fully stir to dissolve; then add dropwise 40mL, 0.2mol / L of tetramethylammonium hydroxide in methanol solution, mixed evenly and left for 24 hours; the resulting precipitate was filtered, washed with methanol, and dispersed in tetrahydrofuran to obtain solution A;

[0035] 2) 0.1g Pd(NO 3 ) 3 2H 2 O was dissolved in 50mL deionized water, then 0.5g polyethyleneimine was added, and superfine Pd nanoparticle sol was obtained through ultrasonic reduction; the ultrasonic frequency was 20kHz, the output power was 250W, and the ultrasonic time was 50min;

[0036] 3) At room temperature, add 50 mL of methanol and 2 g of L-arginine to the obtained Pd nanoparticle sol, stir and mix to obtain solution B;

[0037] 4) Slowly add the obtained solution A to the obtained solution B under stirring co...

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Abstract

The invention discloses a catalyst for tail gas purification. The catalyst for tail gas purification comprises a praseodymium-doped cerium dioxide carrier and noble metal oxide loaded on the carrier; the catalyst is prepared according to the steps of preparing a Ce1-xPrxO2 carrier precursor in advance by a self-assembling method, and loading the noble metal oxide on the Ce1-xPrxO2 carrier precursor according to a hydrothermal deposition method. The thermal decomposition temperature of the noble metal oxide is increased by utilizing strong mutual action between the Ce1-xPrxO2 and the noble metal, so that the heat stability and the activity of the catalyst are obviously improved.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a catalyst for tail gas purification, which can be used for the purification treatment of automobile tail gas and related waste gas. Background technique [0002] With the continuous improvement of people's living standards, there are more and more cars, and the emission of car exhaust has caused great pollution to the environment. Exhaust gas emitted by automobiles mainly includes CO, NO x , HC and other substances. The discharge of these harmful substances has seriously affected people's health and quality of life, and has attracted the attention of more and more countries. In 1978, some scholars proposed for the first time the strong interaction between the metal and the carrier, that is, a special chemical interaction occurs between the surface of the carrier and the dispersed metal particles, which can cause the metal to react with CO and H. 2 The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J37/16B01J37/08B01D53/86B01D53/94
CPCB01D53/86B01D53/94B01D53/945B01D2258/01B01J23/002B01J23/63B01J37/088B01J37/10B01J37/16B01J2523/00B01J2523/3712B01J2523/3718B01J2523/824
Inventor 肖益鸿张旭张楚璠蔡国辉郑勇钟富兰
Owner FUZHOU UNIV
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