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Ruthenium-based ultralow-temperature denitration catalyst

A denitration catalyst and ultra-low temperature technology, applied in the field of denitration catalysts, can solve the problems of poor denitration effect and unsatisfactory anti-poisoning performance, and achieve the effects of good adsorption and transfer, strong corrosion ability, and strong oxygen storage and oxygen release performance.

Active Publication Date: 2019-05-07
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the problem of poor denitrification effect and unsatisfactory anti-poisoning performance of the low-temperature SCR denitrification catalyst in the prior art at an ultra-low temperature of 80-120°C, the present invention provides a ruthenium-based ultra-low temperature denitrification catalyst, which is prepared by staged impregnation and roasting The denitrification active component includes cerium oxide, manganese oxide and ruthenium oxide. The carrier of the active component is titanium dioxide. The catalyst has extremely high NO x Deactivation and good anti-poisoning properties

Method used

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  • Ruthenium-based ultralow-temperature denitration catalyst

Examples

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Effect test

Embodiment 1

[0039] In this example, the ruthenium-based ultra-low temperature denitration catalyst is anatase TiO 2 As a carrier, its surface supports cerium oxide (CeO x ), manganese oxide (MnO x ) and ruthenium oxide (RuO x ) as the denitrification active component. The mass percentages of each metal element in the overall catalyst are: Ce 2.44%, Mn 10.74%, Ru 1.14%, Ti 47.02%, and the mass percentage of the total active elements of Ce, Mn and Ru is 14.32%.

[0040] The ruthenium-based ultra-low temperature denitrification catalyst is prepared by staged impregnation and roasting, and the specific steps are:

[0041] (1) Preparation of Ce-Mn / TiO 2 catalyst

[0042] Weigh 0.038g of cerium nitrate hexahydrate and 0.245g of manganese nitrate tetrahydrate, get 5ml deionized water and 10ml absolute ethanol and mix them into an aqueous ethanol solution, then add cerium nitrate hexahydrate and manganese nitrate tetrahydrate to the aqueous ethanol solution, Mix evenly to prepare active com...

Embodiment 2

[0053] The basic content of this embodiment is the same as that of Example 1, except that the mass percentages of each metal element in the catalyst of this embodiment are respectively: Ce2.44%, Mn10.74%, Ru1.54%, Ti46.72%, wherein Ce The mass percentage of the total active elements of , Mn and Ru is 14.72%. The SEM picture of the ruthenium-based ultra-low temperature denitration catalyst of the present embodiment is as follows figure 1 shown.

[0054] Table 1 shows the denitration and anti-poisoning performance test data of the ruthenium-based ultra-low temperature denitration catalyst in this example.

Embodiment 3

[0056]The basic content of this embodiment is the same as that of Example 1, except that the mass percentages of the metal elements of the catalyst of this embodiment are respectively: Ce2.44%, Mn10.74%, Ru1.9%, Ti46.42%, wherein The mass percentage of the total active elements of Ce, Mn and Ru is 15.08%.

[0057] Table 1 shows the denitration and anti-poisoning performance test data of the ruthenium-based ultra-low temperature denitration catalyst in this example.

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Abstract

The invention discloses a ruthenium-based ultralow-temperature denitration catalyst, and belongs to the technical field of denitration catalysts. The denitration catalyst is prepared by sectional dipping and roasting and comprises the following components in percentage by mass: 1.22-2.84% of cerium element, 10.42-11.7% of manganese element, 1.14%-2.68% of ruthenium element and 45.84%-47.02% of titanium element. Compared with an existing Ce-Mn / TiO2 catalyst, the catalyst disclosed by the invention has the advantages that the denitration effect is good under an ultralow-temperature of 80-120 DEGC, anti-poisoning performance is remarkably improved, the service life is long, and the like.

Description

technical field [0001] The invention belongs to the technical field of denitration catalysts, and more specifically relates to a ruthenium-based ultra-low temperature denitration catalyst. Background technique [0002] NO x It is the main pollutant that forms acid rain and photochemical smog, and can cause direct harm to the human body. Therefore, how to effectively control and treat NO x It has become an extremely important environmental and social issue in today's world. [0003] At present, the main methods used in flue gas denitrification technology are selective catalytic reduction (SCR), selective non-catalytic reduction (SNCR) and SCR / SNCR hybrid technology. SNCR has a relatively strong dependence on temperature, and the denitrification rate is relatively low (only 25% to 40%), while selective catalytic reduction technology (SCR) has been widely used in many countries with strict flue gas emission standards, and can meet higher requirements NO x It is considered t...

Claims

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Application Information

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IPC IPC(8): B01J23/656B01J37/02B01J37/08B01D53/86B01D53/56
Inventor 余正伟任志祥龙红明春铁军孟庆民张洪亮魏汝飞雷杰狄瞻霞王平钱立新施琦王毅璠
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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