Catalyst for removing carbon monoxide in flue gas and preparation method thereof

A carbon monoxide and catalyst technology, which is applied in the field of biomass activated carbon-supported gold microflowers to remove carbon monoxide from flue gas and its preparation, can solve the problems of uneven distribution of active components, easy aggregation of gold nanoparticles, and limited catalyst application. Achieve the effects of easy implementation, overcoming high cost, and strong acid and alkali resistance

Active Publication Date: 2021-10-29
GUODIAN SCI & TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the active components loaded on this type of catalyst are unevenly distributed, resulting in low activity and unstable performance, which limits its application field.
Pd-Ag / CeO disclosed in Chinese patent CN105312064B 2 -ZrO 2 -Y 2 o 3 Catalyst, whose CO removal rate reaches 95% at 140°C, but can only be used in low CO concentration conditions (200ppm), which limits the application of the catalyst in industrial conditions
Chinese patent CN104857957A discloses flower-shaped cerium oxide-supported gold nanoparticle catalysts, which have a CO removal efficiency of 99% in the temperature range of 25-60°C, but the gold loading is 1%-4%, and the carrier is a micron-scale flower Spherical, the active component is gold nanoparticles, the gold nanoparticles are easy to agglomerate after the reaction, resulting in decreased activity and shortened service life, which also limits its application field

Method used

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  • Catalyst for removing carbon monoxide in flue gas and preparation method thereof
  • Catalyst for removing carbon monoxide in flue gas and preparation method thereof
  • Catalyst for removing carbon monoxide in flue gas and preparation method thereof

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Effect test

Embodiment 1

[0029] Catalyst preparation of the present invention:

[0030] (1) Preparation of active component precursor solution

[0031] Weigh 0.0340g of chloroauric acid, add 1mL of ultrapure water to dissolve and use ultrasonic vibration until the solution is clear and transparent to obtain a chloroauric acid solution with a concentration of 100mM, and take 100μL of the solution as a precursor solution for later use;

[0032] (2) Preparation of carrier

[0033] Weigh 2g of coconut shells with a particle size of 0.25-0.425mm, put them in an atmosphere furnace with nitrogen as a protective atmosphere, and roast at 500°C for 2h to obtain biomass carbon, then weigh 2g of sodium hydroxide, and dissolve it in 5g of ultrapure water After stirring for 12 hours with the biomass carbon obtained by roasting, place it in a blast drying oven at 80°C for heat preservation and drying, then place the biomass carbon adsorbed with NaOH in an atmosphere furnace with nitrogen as a protective atmosphere ...

Embodiment 2

[0043] Catalyst preparation method of the present invention is as follows:

[0044] (1) Preparation of active component precursor solution

[0045] Weigh 0.0340g of chloroauric acid, add 1mL of ultrapure water to dissolve and use ultrasonic vibration until the solution is clear and transparent to obtain a chloroauric acid solution with a concentration of 100mM, and take 200μL of the solution as the precursor solution for later use;

[0046] (2) Preparation of carrier

[0047] Weigh 2g of coconut shells with a particle size of 0.25-0.425mm, put them in an atmosphere furnace with nitrogen as a protective atmosphere, and roast at 500°C for 2h to obtain biomass carbon, then weigh 2g of sodium hydroxide, and dissolve it in 5g of ultrapure water After stirring for 12 hours with the biomass carbon obtained by roasting, place it in a blast drying oven at 80°C for heat preservation and drying, then place the biomass carbon adsorbed with NaOH in an atmosphere furnace with nitrogen as a...

Embodiment 3

[0057] Catalyst preparation method of the present invention is as follows:

[0058] (1) Preparation of active component precursor solution

[0059] Weigh 0.0340g of chloroauric acid, add 1mL of ultrapure water to dissolve and use ultrasonic vibration until the solution is clear and transparent, and obtain a chloroauric acid solution with a concentration of 100mM, and take 300μL of the solution as a precursor solution for later use;

[0060] (2) Preparation of carrier

[0061] Weigh 2g of coconut shells with a particle size of 0.25-0.425mm, put them in an atmosphere furnace with nitrogen as a protective atmosphere, and roast at 500°C for 2h to obtain biomass carbon, then weigh 2g of sodium hydroxide, and dissolve it in 5g of ultrapure water After stirring for 12 hours with the biomass carbon obtained by roasting, place it in a blast drying oven at 80°C for heat preservation and drying, then place the biomass carbon adsorbed with NaOH in an atmosphere furnace with nitrogen as a...

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Abstract

The invention discloses a catalyst for removing carbon monoxide in flue gas. The catalyst uses biomass activated carbon as a carrier, and an active component gold micron flower is loaded thereon; the particle size of the biomass activated carbon is 0.25-0.425 mm; the active component gold The micron flowers are 0.4%-2.5% of the mass of the carrier; the biomass activated carbon is prepared from coconut shells. The catalyst prepared by the invention has relatively high activity at low temperature, and the preparation process condition is mild, the method is simple, the operation is safe, and it is easy to implement.

Description

technical field [0001] The invention belongs to the field of catalysts, and in particular relates to a catalyst for removing carbon monoxide from flue gas supported by biomass activated carbon and gold microflowers and a preparation method thereof. Background technique [0002] Carbon monoxide is a typical flammable, explosive and toxic compound, and it is the primary pollutant in the air of many industrial environments and indoor environments. The binding capacity of carbon monoxide with human hemoglobin is 250 times that of oxygen, so it can prevent hemoglobin from transporting absorbed oxygen to human tissues. When the content of carbon monoxide in the air exceeds 30mg / m 3 will be toxic to the human body. Therefore, it is of great practical significance to realize the elimination of carbon monoxide under low temperature conditions. In addition, the low-temperature elimination of carbon monoxide has a wide range of applications, such as carbon monoxide in coal-fired flu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/52B01J35/02B01J37/08B01J37/16B01D53/86B01D53/62
CPCB01D53/864B01D2257/502B01D2258/0283B01J23/52B01J35/026B01J37/084B01J37/16Y02A50/20
Inventor 柏源薛建明唐仲恺
Owner GUODIAN SCI & TECH RES INST
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