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Nano-catalyst for efficiently removing carbon monoxide

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

Inactive Publication Date: 2011-11-23
SHANGHAI NIUYI NEW ENERGY TECH
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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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Lattice doped Ti-doped cryptorhizite 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 The air was kept at 90°C for 24h, filtered, washed, dried at 110°C for 12h, and roasted at 500°C for 6h to obtain lattice-doped titanium cryptopermantite MnO 2 , respectively recorded as "5% TiMn, 10% TiMn, 30% TiMn and 50% TiMn".

[0027] XRD and HRTEM analysis prove that titanium ions enter cryptomanganite 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 10~500mg / m 3 In carbon...

Embodiment 2

[0030] Cryptorganite MnO Doped with Silver in the Channels 2 Prepared by ion exchange method. According to a certain amount of 30% TiMn, 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 roast at 500°C to obtain lattice-doped titanium and channel-doped silver cryptopermantite MnO 2 , Recorded as 1%Ag30%TiMn, 5%Ag30%TiMn and 10%Ag30%TiMn.

[0031] XRD and HRTEM analysis prove that titanium ions enter cryptomanganite MnO 2 Lattice and Ag into cryptopermantite MnO 2 Pores cause slight 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 cryptorite MnO 2 Preparation of monolithic catalysts. Weigh a certain amount of 5%Ag30%TiMn, add a certain proportion of deionized water and 5-50% silica gel adhesive, and stir at a high speed for 1-24 hours to obtain a certain concentration of doped cryptomanganese potassium ore MnO 2 slurry. The doped cryptomanganite 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 12 hours to obtain doped cryptorganite MnO 2 monolithic catalyst. Recorded as "integral AgTiMn".

[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*40mm 3 , 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 , 1~100mg / m 3 and 10~500mg / m 3 In c...

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PUM

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Abstract

The invention discloses a monolithic catalyst for removing carbon monoxide at room temperature, and relates to the field of catalysis and environmental protection. The monolithic catalyst is characterized in that: honeycomb ceramic or a porous foam metal is taken as a carrier, doped cryptomelane MnO2 which is loaded first is taken as a first active ingredient, and platinum-gold with coexisting oxidation state and metallic state which is loaded later is taken as a second active ingredient. The doped cryptomelane MnO2 is characterized in that: metallic state silver and oxidation state silver coexist in ducts with the dimensions of about 0.46*0.46nm<2>, and titanium ions (Ti<4+>) substitute partial lattice sites of the cryptomelane MnO2; and Ag and Ti account for 0 to 20 weight percent and 0 to 50 weight percent of alpha-MnO2 respectively. A platinum-gold alloy accounts for 0 to 10 weight percent of the doped cryptomelane MnO2, wherein platinum accounts for 0 to 100 weight percent of the platinum-gold alloy. The monolithic catalyst can efficiently and steadily remove carbon monoxide pollutants in the air in the normal-temperature normal-pressure real environment.

Description

technical field [0001] The invention is an integral catalyst for removing carbon monoxide at room temperature, and relates to the fields of catalysis and environmental protection. It is characterized in that honeycomb ceramics or porous metal foam are used as the carrier to first load doped cryptomanganite 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 characteristic of the monolithic catalyst of the present invention is that it does not require the input of additional light, heat, electricity and other energy sources, and can efficiently and stably remove carbon monoxide 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 above-mentioned catalyst to various air puri...

Claims

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Application Information

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IPC IPC(8): B01J23/68B01J23/34B01D53/86B01D53/62
CPCY02A50/20
Inventor 不公告发明人
Owner SHANGHAI NIUYI NEW ENERGY TECH
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