書誌事項
- タイトル別名
-
- Characterization of Long-Term Used De-NO<sub>x</sub> Catalyst
- チョウキ シヨウ ハニカムガタ ダッショウ ショクバイ ノ トクセイ ヒョウカ
- Characterization of Long-Term Used De-NOx Catalyst
この論文をさがす
抄録
In coal-fired power plants, selective catalytic de-NOx systems are widely used and offer a very efficient method to reduce NOx emissions from such plants. However, de-NOx catalyst degrades in long-term operation and catalysts must be periodically exchanged. Exchange of catalysts costs a great deal, hence there is a strong economic incentive to elucidate the degradation mechanism of catalysts and optimize the operation conditions of de-NOx equipment. In this study, fluorescent X-ray analysis is performed to investigate the elemental distribution on the catalyst surface. Also, X-ray absorption fine structure (XAFS) analysis is applied to determine the chemical form of Vanadium in the catalyst. The results show that elements found in fly ash are detectable in the upstream region near the inlet, whereas such elements are not detected in the downstream region near the outlet. This tendency is in good qualitative agreement with the author's previous numerical result. Vanadium in the fresh catalyst is mainly in its 3+ valence state, whereas that in used catalyst is mainly in the 4+ or 5+ valence states. The ratio of vanadium in 5+ valence state is larger in the inlet region than in the downstream region. This is due to turbulent eddy mixing which promotes vanadium oxidation in the inlet region.
収録刊行物
-
- 粉体工学会誌
-
粉体工学会誌 50 (10), 733-740, 2013
一般社団法人 粉体工学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390282679489203328
-
- NII論文ID
- 10031203335
-
- NII書誌ID
- AN00222757
-
- COI
- 1:CAS:528:DC%2BC3sXhvVaksLjK
-
- ISSN
- 18837239
- 03866157
-
- NDL書誌ID
- 024942473
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可