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Regenerative denitration catalyst, method for producing same, and denitration device

The technology of a denitration catalyst and a manufacturing method is applied in the fields of regenerated denitration catalyst and its manufacture and denitration device, which can solve the problems such as the reduction of denitration performance, and achieve the effect of restoring denitration performance.

Pending Publication Date: 2021-10-12
MITSUBISHI HEAVY IND LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The denitrification catalyst with reduced denitrification performance is replaced with a new denitrification catalyst, and the used denitrification catalyst is discarded

Method used

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  • Regenerative denitration catalyst, method for producing same, and denitration device
  • Regenerative denitration catalyst, method for producing same, and denitration device
  • Regenerative denitration catalyst, method for producing same, and denitration device

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no. 1 approach

[0037] The regenerated denitration catalyst according to this embodiment includes: a used denitration catalyst mainly composed of a first titanium oxide; and a second titanium oxide. In the regenerated denitration catalyst, the first titanium oxide contained in the used denitration catalyst is mixed with the second titanium oxide. Titanium oxides (the first titanium oxide and the second titanium oxide) can be included in the range of, for example, 60% by weight to 85% by weight, preferably 70% by weight to 80% by weight, relative to the total weight of the regenerated denitration catalyst. In regenerated denitration catalyst.

[0038] The "first titanium oxide" is a used name of the titanium oxide contained in the denitration catalyst before use. "Main component" refers to the component contained most in the object. The specific surface area per unit weight of the titanium oxide contained in the denitration catalyst before use can be, for example, about 100m 2 / g. The spec...

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Abstract

The purpose of the present invention is to provide: a regenerated denitration catalyst in which a used denitration catalyst is used to restore denitration performance compared to a denitration catalyst before use; and a method for producing the regenerated denitration catalyst. The regenerated denitration catalyst according to the present disclosure is mixed with: a denitration catalyst which contains a first titanium oxide as a main component and is used in a denitration reaction in which nitrogen oxides in a gas are decomposed into nitrogen and water using a reducing agent; and a second titanium oxide, the specific surface area per unit weight of which is larger than the specific surface area per unit weight of the first titanium oxide. The content of the second titanium oxide relative to the total weight of the first titanium oxide and the second titanium oxide is preferably from 10% to 90% by weight (inclusive).

Description

technical field [0001] The present disclosure relates to a regenerated denitration catalyst, a manufacturing method thereof, and a denitration device. Background technique [0002] Nitrogen oxides (hereinafter, NOx) are contained in combustion exhaust gas discharged from boilers, gas turbines, combustion furnaces, and the like. As a method for removing NOx in exhaust gas, an ammonia catalytic reduction method is well known. In the ammonia contact reduction method, in the presence of a denitrification catalyst, ammonia (NH 3 ) as a reducing agent to perform a denitrification reaction that decomposes NOx into harmless nitrogen and water. [0003] As a denitration catalyst that promotes a denitration reaction, a catalyst containing titanium oxide as a main component is widely used. When the denitration catalyst is used for a long period of time, the denitration performance, which is the reaction rate of the denitration reaction, decreases. Decrease in denitrification perfor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J23/22B01J23/28B01J23/30B01J27/14B01J27/18B01J27/188B01J27/19B01J27/198B01J27/199B01J35/04B01D53/56B01D53/90
CPCB01D53/90B01D53/8628B01J21/063B01J23/22B01J23/28B01J23/30B01J27/1802B01J27/19B01J27/198B01J27/199B01D2251/2062B01J21/20B01D53/96B01D2258/0283B01D2255/20723B01D2255/20769B01D2255/20776B01D2255/20707B01J37/0244B01J27/14B01J38/68B01J35/56B01J35/613B01J35/615B01J38/00B01D53/88B01J27/28B01D2255/9022B01D2255/9207B01D2257/404B01J37/0009B01J37/0217B01J37/04C01B5/00C01B21/02
Inventor 宍户聪占部裕仓井琢麻加古博野地胜己
Owner MITSUBISHI HEAVY IND LTD
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