Study on the mechanism of a manganese-based catalyst for catalytic NOX flue gas denitration
Manganese-based bimetallic catalysts were prepared with self-made pyrolysis coke as carrier and its denitration performance of low-temperature SCR (selective catalyst reduction) was studied. The effects of different metal species, calcination temperature, calcination ti...
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2018-04-01
|
| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.4989431 |
| _version_ | 1818905906797084672 |
|---|---|
| author | Lei Zhang Xin Wen Zhang Lei Long Gao Xiangling Sha Zhenhua Ma Huibin He Yusu Wang Yang Jia Yonghui Li |
| author_facet | Lei Zhang Xin Wen Zhang Lei Long Gao Xiangling Sha Zhenhua Ma Huibin He Yusu Wang Yang Jia Yonghui Li |
| author_sort | Lei Zhang |
| collection | DOAJ |
| description | Manganese-based bimetallic catalysts were prepared with self-made pyrolysis coke as
carrier and its denitration performance of low-temperature SCR (selective catalyst
reduction) was studied. The effects of different metal species, calcination temperature,
calcination time and the metal load quantity on the denitration performance of the
catalyst were studied by orthogonal test. The denitration mechanism of the catalyst was
analyzed by XRD (X-ray diffraction), SEM (scanning electron microscope), BET test and
transient test. The experiments show that: ① The denitration efficiency of Mn-based
bimetallic catalysts mainly relates to the metal type, the metal load quantity and the
catalyst adjuvant type. ② The optimal catalyst preparation conditions are as follows: the
load quantity of monometallic MnO2 is 10%, calcined at 300°C for 4h, and then
loaded with 8% CeO2, calcined at 350°Cfor 3h. ③ The denitration mechanism of
manganese-based bimetallic oxide catalysts is stated as: NH3 is firstly
adsorbed by B acid center Mn-OH which nears Mn4+==O to form NH4+,
NH4+ was then attacked by the gas phase NO to form N2,
H2O and Mn3+-OH. Finally, Mn3+-OH was oxidized by
O2 to regenerate Mn4+. |
| first_indexed | 2024-12-19T21:30:47Z |
| format | Article |
| id | doaj.art-044f50a8287a40cd8425469810e2bfc6 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-19T21:30:47Z |
| publishDate | 2018-04-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-044f50a8287a40cd8425469810e2bfc62022-12-21T20:04:55ZengAIP Publishing LLCAIP Advances2158-32262018-04-0184045004045004-1010.1063/1.4989431080803ADVStudy on the mechanism of a manganese-based catalyst for catalytic NOX flue gas denitrationLei Zhang0Xin Wen1Zhang Lei2Long Gao3Xiangling Sha4Zhenhua Ma5Huibin He6Yusu Wang7Yang Jia8Yonghui Li9School of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, ChinaSchool of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, ChinaChina National Heavy Machinery Research Institute Co., Ltd, Xi’an 710032, ChinaSchool of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, ChinaSchool of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, ChinaSchool of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, ChinaSchool of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, ChinaSchool of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, ChinaSchool of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, ChinaChina National Heavy Machinery Research Institute Co., Ltd, Xi’an 710032, ChinaManganese-based bimetallic catalysts were prepared with self-made pyrolysis coke as carrier and its denitration performance of low-temperature SCR (selective catalyst reduction) was studied. The effects of different metal species, calcination temperature, calcination time and the metal load quantity on the denitration performance of the catalyst were studied by orthogonal test. The denitration mechanism of the catalyst was analyzed by XRD (X-ray diffraction), SEM (scanning electron microscope), BET test and transient test. The experiments show that: ① The denitration efficiency of Mn-based bimetallic catalysts mainly relates to the metal type, the metal load quantity and the catalyst adjuvant type. ② The optimal catalyst preparation conditions are as follows: the load quantity of monometallic MnO2 is 10%, calcined at 300°C for 4h, and then loaded with 8% CeO2, calcined at 350°Cfor 3h. ③ The denitration mechanism of manganese-based bimetallic oxide catalysts is stated as: NH3 is firstly adsorbed by B acid center Mn-OH which nears Mn4+==O to form NH4+, NH4+ was then attacked by the gas phase NO to form N2, H2O and Mn3+-OH. Finally, Mn3+-OH was oxidized by O2 to regenerate Mn4+.http://dx.doi.org/10.1063/1.4989431 |
| spellingShingle | Lei Zhang Xin Wen Zhang Lei Long Gao Xiangling Sha Zhenhua Ma Huibin He Yusu Wang Yang Jia Yonghui Li Study on the mechanism of a manganese-based catalyst for catalytic NOX flue gas denitration AIP Advances |
| title | Study on the mechanism of a manganese-based catalyst for catalytic
NOX flue gas denitration |
| title_full | Study on the mechanism of a manganese-based catalyst for catalytic
NOX flue gas denitration |
| title_fullStr | Study on the mechanism of a manganese-based catalyst for catalytic
NOX flue gas denitration |
| title_full_unstemmed | Study on the mechanism of a manganese-based catalyst for catalytic
NOX flue gas denitration |
| title_short | Study on the mechanism of a manganese-based catalyst for catalytic
NOX flue gas denitration |
| title_sort | study on the mechanism of a manganese based catalyst for catalytic nox flue gas denitration |
| url | http://dx.doi.org/10.1063/1.4989431 |
| work_keys_str_mv | AT leizhang studyonthemechanismofamanganesebasedcatalystforcatalyticnoxfluegasdenitration AT xinwen studyonthemechanismofamanganesebasedcatalystforcatalyticnoxfluegasdenitration AT zhanglei studyonthemechanismofamanganesebasedcatalystforcatalyticnoxfluegasdenitration AT longgao studyonthemechanismofamanganesebasedcatalystforcatalyticnoxfluegasdenitration AT xianglingsha studyonthemechanismofamanganesebasedcatalystforcatalyticnoxfluegasdenitration AT zhenhuama studyonthemechanismofamanganesebasedcatalystforcatalyticnoxfluegasdenitration AT huibinhe studyonthemechanismofamanganesebasedcatalystforcatalyticnoxfluegasdenitration AT yusuwang studyonthemechanismofamanganesebasedcatalystforcatalyticnoxfluegasdenitration AT yangjia studyonthemechanismofamanganesebasedcatalystforcatalyticnoxfluegasdenitration AT yonghuili studyonthemechanismofamanganesebasedcatalystforcatalyticnoxfluegasdenitration |