In situ regeneration of commercial NH3-SCR catalysts with high-temperature water vapor

Yao Shi; Pei Zhang; Tuotuo Fang; Erhao Gao; Fujuan Xi; Tianyu Shou; Mengna Tao; Siming Wu; Matthew T. Bernards; Yi He; Hua Pan

doi:10.1016/j.catcom.2018.08.009

In situ regeneration of commercial NH₃-SCR catalysts with high-temperature water vapor

Yao Shi
, Pei Zhang
, Tuotuo Fang
, Erhao Gao
, Fujuan Xi
, Tianyu Shou
, Mengna Tao
, Siming Wu
, Matthew T. Bernards
, Yi He
, Hua Pan

Key Laboratory of Biomass Chemical Engineering
University of Idaho
Zhejiang Shuren University

Research output: Contribution to journal › Article › peer-review

36 Scopus citations

Abstract

The performance of a commercial NH₃-SCR catalyst used for 20,000 h in a 660 MW coal fired power plant was evaluated after treated in situ with water vapor at 300–350 °C for 336 h. The conversion of NO_x reached 91.4% after this water treatment. The recovery of catalytic activity is mainly due to the removal of potassium, arsenic and sulfate-containing deposits from the catalyst surface, as well as the increase of surface active oxygen species and specific surface area. These results indicate that commercial NH₃-SCR catalysts are deactivated by the deposition of water-soluble substances and which can be in situ regenerated cost-effectively with high-temperature water vapor treatment.

Original language	English
Pages (from-to)	57-61
Number of pages	5
Journal	Catalysis Communications
Volume	116
DOIs	https://doi.org/10.1016/j.catcom.2018.08.009
State	Published - Nov 2018
Externally published	Yes

Keywords

Commercial deNO catalysts
High-temperature water vapor treatment
In situ regeneration
NH-SCR

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10.1016/j.catcom.2018.08.009

Cite this

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title = "In situ regeneration of commercial NH3-SCR catalysts with high-temperature water vapor",

abstract = "The performance of a commercial NH3-SCR catalyst used for 20,000 h in a 660 MW coal fired power plant was evaluated after treated in situ with water vapor at 300–350 °C for 336 h. The conversion of NOx reached 91.4\% after this water treatment. The recovery of catalytic activity is mainly due to the removal of potassium, arsenic and sulfate-containing deposits from the catalyst surface, as well as the increase of surface active oxygen species and specific surface area. These results indicate that commercial NH3-SCR catalysts are deactivated by the deposition of water-soluble substances and which can be in situ regenerated cost-effectively with high-temperature water vapor treatment.",

keywords = "Commercial deNO catalysts, High-temperature water vapor treatment, In situ regeneration, NH-SCR",

author = "Yao Shi and Pei Zhang and Tuotuo Fang and Erhao Gao and Fujuan Xi and Tianyu Shou and Mengna Tao and Siming Wu and Bernards, \{Matthew T.\} and Yi He and Hua Pan",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = nov,

doi = "10.1016/j.catcom.2018.08.009",

language = "英语",

volume = "116",

pages = "57--61",

journal = "Catalysis Communications",

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TY - JOUR

T1 - In situ regeneration of commercial NH3-SCR catalysts with high-temperature water vapor

AU - Shi, Yao

AU - Zhang, Pei

AU - Fang, Tuotuo

AU - Gao, Erhao

AU - Xi, Fujuan

AU - Shou, Tianyu

AU - Tao, Mengna

AU - Wu, Siming

AU - Bernards, Matthew T.

AU - He, Yi

AU - Pan, Hua

PY - 2018/11

Y1 - 2018/11

N2 - The performance of a commercial NH3-SCR catalyst used for 20,000 h in a 660 MW coal fired power plant was evaluated after treated in situ with water vapor at 300–350 °C for 336 h. The conversion of NOx reached 91.4% after this water treatment. The recovery of catalytic activity is mainly due to the removal of potassium, arsenic and sulfate-containing deposits from the catalyst surface, as well as the increase of surface active oxygen species and specific surface area. These results indicate that commercial NH3-SCR catalysts are deactivated by the deposition of water-soluble substances and which can be in situ regenerated cost-effectively with high-temperature water vapor treatment.

AB - The performance of a commercial NH3-SCR catalyst used for 20,000 h in a 660 MW coal fired power plant was evaluated after treated in situ with water vapor at 300–350 °C for 336 h. The conversion of NOx reached 91.4% after this water treatment. The recovery of catalytic activity is mainly due to the removal of potassium, arsenic and sulfate-containing deposits from the catalyst surface, as well as the increase of surface active oxygen species and specific surface area. These results indicate that commercial NH3-SCR catalysts are deactivated by the deposition of water-soluble substances and which can be in situ regenerated cost-effectively with high-temperature water vapor treatment.

KW - Commercial deNO catalysts

KW - High-temperature water vapor treatment

KW - In situ regeneration

KW - NH-SCR

UR - https://www.scopus.com/pages/publications/85051814021

U2 - 10.1016/j.catcom.2018.08.009

DO - 10.1016/j.catcom.2018.08.009

M3 - 文章

AN - SCOPUS:85051814021

SN - 1566-7367

VL - 116

SP - 57

EP - 61

JO - Catalysis Communications

JF - Catalysis Communications

ER -

In situ regeneration of commercial NH₃-SCR catalysts with high-temperature water vapor

Abstract

Keywords

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