2018
DOI: 10.3390/en12010123
|View full text |Cite
|
Sign up to set email alerts
|

Performance of C2H4 Reductant in Activated-Carbon- Supported MnOx-based SCR Catalyst at Low Temperatures

Abstract: Hydrocarbons as reductants show promising results for replacing NH3 in SCR technology. Therefore, considerable interest exists for developing low-temperature (<200 °C) and environmentally friendly HC-SCR catalysts. Hence, C2H4 was examined as a reductant using activated-carbon-supported MnOx-based catalyst in low-temperature SCR operation. Its sensitivity to Mn concentration and operating temperature was parametrically studied, the results of which showed that the catalyst activity followed the order of 130… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

1
7
1

Year Published

2019
2019
2023
2023

Publication Types

Select...
6

Relationship

3
3

Authors

Journals

citations
Cited by 7 publications
(9 citation statements)
references
References 64 publications
1
7
1
Order By: Relevance
“…SEM images and EDS elemental mappings of fresh Mn 3 Ce 3 /NAC catalyst are presented in Figure 1 . The catalyst morphology was similar to that in previous studies, 40 the active components are evenly loaded on the surface of the activated carbon with particle structure. Elemental distributions indicated well-dispersed manganese and cerium on the NAC surface and without agglomeration, 47 which helps to improve the catalytic efficiency of the catalyst.…”
Section: Results and Discussionsupporting
confidence: 79%
See 1 more Smart Citation
“…SEM images and EDS elemental mappings of fresh Mn 3 Ce 3 /NAC catalyst are presented in Figure 1 . The catalyst morphology was similar to that in previous studies, 40 the active components are evenly loaded on the surface of the activated carbon with particle structure. Elemental distributions indicated well-dispersed manganese and cerium on the NAC surface and without agglomeration, 47 which helps to improve the catalytic efficiency of the catalyst.…”
Section: Results and Discussionsupporting
confidence: 79%
“…MnO x /AC 40 was used with C 2 H 4 as a reductant and exhibited over 90% NO conversion even at temperatures as low as 130 °C; it deactivated rapidly such that only 20% conversion was evident after only 2 h of testing. This deactivation was attributed to a combination of the following: first, the valence state of the Mn decreased from Mn 4+ to Mn 3+ and Mn 2+ , but Mn 4+ was found to be more active than the other two valences; second, carbon black was deposited on the active carbon surface during SCR reaction testing, blocking channels, and active catalytic sites.…”
Section: Introductionmentioning
confidence: 99%
“…These aggregates could represent agglomeration sites of the originally active catalytic components, and thereby greatly affect active site dispersion to cause rapid deactivation. However, although this agglomeration was less than that observed for MnOx species in previously published data on a reaction tested 3Mn/NAC catalyst [39], its activity had decreased to near 20% NO conversion after 120 min of testing whereas the activity of 1.5Fe3Mn/NAC at the same time was near 80% NO conversion. Thus, their presence did not significantly affect the catalytic performance but still cause a NO conversion drop during 2 h testing.…”
Section: Physical Properties Evolutioncontrasting
confidence: 70%
“…The NO conversion data versus time at different temperatures are shown in Figure 2 while using the 3Mn/NAC catalyst. It was used to provide baseline data that could be compared with previously published data [39]. Nearly 100% NO conversion occurred during the first 20 min at all temperatures (150 • C, 180 • C and 200 • C), but it suffered rapid declines after this initial period and showed less than The NO conversion testing data for XFe/NAC (X = 3, 5 and 7%) at 150 °C are presented in Figure 3.…”
Section: Catalytic Performancementioning
confidence: 99%
See 1 more Smart Citation