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VOCs elimination catalyst and preparation method thereof

A catalyst and oxide technology, applied in the nano field, can solve the problems of limiting the wide application of noble metal-based catalysts, and achieve the effects of obvious industrial application value, convenient operation, and high benzene catalytic oxidation activity.

Active Publication Date: 2017-11-21
FUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Catalytic oxidation is one of the effective methods to remove VOCs. Noble metal-based catalysts such as Pt, Pd, Au and Ag show low-temperature VOCs elimination performance. The wide application of noble metal-based catalysts in industry

Method used

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  • VOCs elimination catalyst and preparation method thereof
  • VOCs elimination catalyst and preparation method thereof

Examples

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Embodiment 1

[0023] With Co 3 o 4 Taking nanowires as an example, the raw materials are cobalt nitrate, urea, ethanol and HCl. Specifically: Weigh: 100 mg Co(NO 3 ) 2 ·6H 2 O (molecular weight 291.0), 100 mg urea (molecular weight 60), and then add 35 mL water and 15 mL ethanol mixed solvent, and add 1 mL HCl (3M) to the above solution, stir at room temperature for 1 h, turn to into the water heating kettle, 140 o C, reacted for 10 h, centrifuged, washed with ethanol and water 5-6 times. Put in -46 o Under vacuum freezing for 10 h at 120 o C drying for 24h, then into the muffle furnace roasting, with 1 o C / min heating rate rises to 400 o C, at 400 o C for 4 h. The samples synthesized through the above steps are marked as Co 3 o 4 Nanowires, the synthesized nanowires are 20-30 nm in diameter and 3-12 in length mu m (such as figure 1 in A).

Embodiment 2

[0025] With Co 5 mn 1 O nanoneedles as an example, the raw materials are cobalt nitrate and manganese nitrate, urea, ethanol and HCl. Specifically: Weighing: 85.28 mg Co(NO 3 ) 2 ·6H 2 O (molecular weight 291.0), 14.71 mg Mn(NO 3 ) 2 4H 2 O (molecular weight 251.01), 100 mg urea (molecular weight 60), then add 35 mL of water and 15 mL of ethanol mixed solvent, add 1 mL of HCl (3M) to the above solution, stir at room temperature for 1 h, transfer to Water heating kettle, 140 o C, reacted for 10 h, centrifuged, washed with ethanol and water 5-6 times. Put in -46 o Under vacuum freezing for 10 h at 120 o C drying for 24 h and then into the muffle furnace roasting, with 1 o C / min heating rate rises to 400 o C, at 400 o C for 4 h. The samples synthesized through the above steps are marked as Co 5 mn 1 O nanoneedles, the synthesized nanoneedles have a diameter of 210 nm and a length of 3-12 mu between m (such as figure 1 in B).

Embodiment 3

[0027] With Co 1 mn 1 O nanoflowers as an example, the raw materials are cobalt nitrate and manganese nitrate, urea, ethanol and HCl. Specifically: Weighing: 53.69 mg Co(NO 3 ) 2 ·6H 2 O (molecular weight 291.0), 46.30 mg Mn (NO 3 ) 2 4H 2 O (molecular weight 251.01), 100 mg urea (molecular weight 60), and then add 35 mL of water and 15 mL of ethanol mixed solvent, add 1 mL of HCl (3M) to the above solution, stir at room temperature for 1 h, transfer to into the water heating kettle, 140 o C, reacted for 10 h, centrifuged, washed with ethanol and water 5-6 times. Put in -46 o Under vacuum freezing for 10 h at 120 o C drying for 24 h and then into the muffle furnace roasting, with 1 o C / min heating rate rises to 400 o C, at 400 o C for 4 h. The samples synthesized through the above steps are marked as Co 1 mn 1 O Hollow spheres, hollow spheres are composed of uniform nanoribbons with a diameter of about 400 nm (such as figure 1 in C).

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Abstract

The invention discloses a VOCs elimination catalyst and a preparation method thereof. According to a hydrothermal process, a reducer and an accelerator are added, and the Co / Mn mole ratio is regulated to regulate and control the shape and nanoparticle size of the catalyst. The catalyst has higher benzene catalytic oxidation activity within a wider temperature range. The benzene catalytic conversion rate of the catalyst at 207 DEG C is up to 90%. The catalyst disclosed by the invention has better purifying effects than the traditional benzene catalytic oxidation catalyst. The preparation method has the advantages of simple preparation technique and low cost, and is convenient to operate. The catalyst has high benzene conversion rate, and has obvious industrial application values.

Description

technical field [0001] The invention belongs to the field of nanotechnology, and in particular relates to the controllable synthesis of Co-Mn composite oxide catalysts and its application to the purification of organic pollutants discharged from stationary sources and mobile sources. Background technique [0002] Human survival and development are inseparable from a suitable environment. With the development of industry, environmental pollution is becoming more and more serious, and even threatens the survival and development of human beings. Therefore, it is urgent to protect the environment. Volatile organic compounds (VOCs) are one of the important environmental pollutants, which may directly cause damage to human health, or may be transformed into photochemical smog or PM 2.5, causing secondary pollution. Therefore, the removal of VOCs is of great significance to environmental protection. Catalytic oxidation is one of the effective methods to remove VOCs. Noble metal-ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J23/889B01J23/34B01J37/03B01J37/32B01J37/08B01J35/06B01J35/08B01D53/94B01D53/72
CPCB01D53/72B01D53/94B01J23/002B01J23/34B01J23/75B01J23/8892B01J37/036B01J37/082B01J37/32B01D2257/708B01D2257/7027B01D2258/01B01D2258/0283B01J35/393B01J35/58B01J35/23B01J35/51Y02A50/20
Inventor 江莉龙王秀云吴翔炜张天华蔡国辉肖益鸿
Owner FUZHOU UNIV
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