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Monolithic catalyst for simultaneously removing formaldehyde, carbon monoxide and ozone at room temperature

A carbon monoxide and catalyst technology, which is applied in the preparation of the above-mentioned catalysts, the above-mentioned catalysts, and the field of monolithic catalysts, can solve the problems of poor moisture resistance, etc., and achieve the effects of strong moisture resistance, large processing capacity, and no secondary pollution

Inactive Publication Date: 2010-08-11
李溪 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But poor moisture resistance and / or the need for additional energy input are the biggest obstacles to the widespread application of these catalysts

Method used

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  • Monolithic catalyst for simultaneously removing formaldehyde, carbon monoxide and ozone at room temperature
  • Monolithic catalyst for simultaneously removing formaldehyde, carbon monoxide and ozone at room temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Lattice doped titanium α-MnO 2 Prepared by redox method. Add a certain proportion of manganese sulfate and titanium sulfate into a 500mL flask, and then feed 20mL / min containing 600mg / m 3 Ozone air, at a constant temperature of 90°C for 24h, filtered, washed, dried at 110°C for 12h, and calcined at 500°C for 6h to obtain α-MnO doped with titanium lattice 2 , respectively denoted as "5%Ti-MnO 2 , 10% Ti-MnO 2 , 30% Ti-MnO 2 and 50% Ti-MnO 2 ".

[0027] XRD and HRTEM analysis prove that titanium ions enter into α-MnO 2 lattice.

[0028] Catalyst performance tests were carried out in a continuous-flow fixed-bed reactor. Before the catalyst performance test, the catalyst was not treated in any way. The powder catalyst was pressed into tablets and crushed to make 0.25-0.50mm particle samples, and then 0.5g particle samples were placed in a glass tube, at room temperature (20°C) and relative Under the condition of humidity of 50%, pass through containing 0.1~50mg / m ...

Embodiment 2

[0030] α-MnO doped with silver in the channels 2 Prepared by ion exchange method. According to a certain amount of 30%Ti-MnO 2 Add 500mL of different concentrations of AgNO 3 solution, add 10% H 2 o 2 Aqueous solution, then add 25wt% ammonia water, stir and exchange at room temperature for 12h, filter, wash, dry at 110°C for 12h, and then bake at 500°C to obtain lattice-doped titanium and channel-doped silver α-MnO 2 , denoted as 1%Ag30%Ti-MnO 2 , 5%Ag30%Ti-MnO 2 and 10%Ag30%Ti-MnO 2 .

[0031] XRD and HRTEM analysis prove that titanium ions enter into α-MnO 2 Lattice and Ag into α-MnO 2 Pores lead to micro-changes in the channels.

[0032] The catalytic activity test is the same as in Example 1. The results are shown in Table 1.

Embodiment 3

[0034] Doped α-MnO 2 Preparation of monolithic catalysts. Weigh a certain amount of 5%Ag30%Ti-MnO 2 , add a certain proportion of deionized water and 5-50% silica gel adhesive, stir at a high speed for 1-24 hours, and obtain a certain concentration of doped α-MnO 2 slurry. The doped α-MnO was extracted by vacuum-negative pressure extraction technology 2 The slurry is coated on the pre-treated honeycomb ceramics or porous metal foam, and fired at 500°C for 12h to obtain doped α-MnO 2 monolithic catalyst. Denoted as "integral AgTi-MnO 2 ".

[0035] The performance test of the monolithic catalyst is carried out in the air purifier EN of Huanengtong Group TM Carried on. The three-dimensional of monolithic catalyst is 150*150*40mm3 , and then put it into the air purifier, at room temperature (20°C) and relative humidity of 50%, pass through the air containing 0.1 ~ 50mg / m 3 Formaldehyde, 1~100mg / m 3 Ozone and 10~500mg / m 3 In carbon monoxide air, the wind speed is 2.5m / s....

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Abstract

The invention discloses a monolithic catalyst for simultaneously removing formaldehyde, carbon monoxide and ozone at room temperature, and relates to the fields of catalysis and environmental protection. The monolithic catalyst is characterized in that: honeycomb ceramics or porous foam metal is taken as a carrier; doped alpha-MnO2 which is supported first is taken as a first active ingredient; and platinum-gold with coexistence of an oxidation state and a metallic state, which is supported later, is taken as a second active ingredient. The doped alpha-MnO2 is characterized in that: silver in a metallic state and an oxidation state simultaneously exists in pores of which the size is about 0.46*0.46nm<2>, and titanium ions (Ti4+) replace partial lattices of the alpha-MnO2; and the Ag and Ti respectively account for 0 to 20 weight percent and 0 to 50 weight percent of the alpha-MnO2. The weight ratio of a platinum-gold alloy to the doped alpha-MnO2 is 0 to 10 percent, wherein the platinum accounts for 0 to 100 weight percent of the platinum-gold alloy. The monolithic catalyst can efficiently and stably remove the formaldehyde, carbon monoxide and ozone pollutants in air simultaneously in actual environment at normal temperature and normal pressure.

Description

technical field [0001] The invention is an integral catalyst for simultaneously removing formaldehyde, carbon monoxide and ozone at room temperature, and relates to the fields of catalysis and environmental protection. It is characterized in that honeycomb ceramics or porous metal foams are used as carriers to first load doped α-MnO 2 It is the first active component, and platinum-gold, which coexists in oxidation state and metal state, is the second active component. The feature of the monolithic catalyst of the present invention is that it does not require additional energy input such as light, heat, and electricity, and simultaneously efficiently and stably removes formaldehyde, carbon monoxide, and ozone pollutants in the air under the conditions of normal temperature, humidity, and large air volume. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The present invention also relates to the application of the abo...

Claims

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Application Information

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IPC IPC(8): B01D53/86B01D53/72B01D53/62B01D53/56B01J23/54B01J23/656B01J23/68B01J35/04
CPCY02A50/20
Inventor 李溪唐幸福蒋新姣
Owner 李溪
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