scholarly journals Investigation of CO Deactivation of Passive NOx Adsorption on La Promoted Pd/BEA

2021 ◽  
Author(s):  
Rojin Feizie Ilmasani ◽  
Phuoc Hoang Ho ◽  
Aiyong Wang ◽  
Dawei Yao ◽  
Derek Creaser ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Low Temperatures ◽  
Catalytic Reduction ◽  
Significant Loss ◽  
Co Concentration ◽  
Nox Adsorption ◽  
Multiple Cycles ◽  
Adsorption Desorption ◽  
Urea Decomposition ◽  
Desorption Capacity

AbstractPassive NOx adsorption (PNA) is a method, in which NOx can be stored at low temperatures and released at higher temperatures where the urea decomposition is functional during selective catalytic reduction (i.e., above 180–200 °C). We have studied the promotion of Pd/BEA with La as a PNA in the presence of high CO concentration. Both the reference and promoted samples exhibited a significant loss of NOx adsorption/desorption capacity after multiple cycles using 4000 ppm CO. However, already after 5 cycles, 99% of the NOx released between 200 and 400 °C was lost for Pd/BEA, compared to only 64% for Pd-La/BEA, which thereafter was stable. XPS and O2-TPD clearly showed that the Pd species were influenced by La. The PNA deactivation in the presence of CO could be related to Pd reduction followed by migration and the formation of more PdOx clusters, as observed by O2-TPD analysis. Interestingly, significantly more PdOx clusters formed on Pd/BEA after 10 cycles compared to Pd-La/BEA.

Highly dispersed MnOx–FeOx supported by silicalite-1 for the selective catalytic reduction of NOx with NH3 at low temperatures

2020 ◽  
Vol 10 (16) ◽  
pp. 5525-5534 ◽  
Author(s):  
Jialiang Gu ◽  
Bingjun Zhu ◽  
Rudi Duan ◽  
Yan Chen ◽  
Shaoxin Wang ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Low Temperatures ◽  
Catalytic Reduction ◽  
Highly Dispersed ◽  
Reduction Of Nox

MnOx–FeOx-Loaded silicalite-1 catalysts exhibit high NOx conversion at low temperatures.

The synergistic effects between Ce and Cu in CuyCe1−yW5Ox catalysts for enhanced NH3-SCR of NOx and SO2 tolerance

2019 ◽  
Vol 9 (3) ◽  
pp. 718-730 ◽  
Author(s):  
Jian-Wen Shi ◽  
Yao Wang ◽  
Ruibin Duan ◽  
Chen Gao ◽  
Baorui Wang ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Selective Catalytic Reduction ◽  
Low Temperatures ◽  
Catalytic Reduction ◽  
Synergistic Effects ◽  
Reduction Of No ◽  
Nh3 Scr ◽  
So2 Tolerance ◽  
Scr Of Nox

Non-manganese-based metal oxides are promising catalysts for the NH3-SCR (selective catalytic reduction) of NOx at low temperatures.

Selective catalytic reduction of NOx with NH3 over Mn-Ce mixed oxide catalyst at low temperatures

2013 ◽  
Vol 216 ◽  
pp. 76-81 ◽  
Author(s):  
Zhiming Liu ◽  
Yang Yi ◽  
Shaoxuan Zhang ◽  
Tianle Zhu ◽  
Junzhi Zhu ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Mixed Oxide ◽  
Low Temperatures ◽  
Oxide Catalyst ◽  
Catalytic Reduction ◽  
Mixed Oxide Catalyst ◽  
Reduction Of Nox

MnOx–CeO2/Activated Carbon Honeycomb Catalyst for Selective Catalytic Reduction of NO with NH3 at Low Temperatures

2012 ◽  
Vol 51 (36) ◽  
pp. 11667-11673 ◽  
Author(s):  
Yanli Wang ◽  
ChuanZhang Ge ◽  
Liang Zhan ◽  
Cui Li ◽  
Wenming Qiao ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Selective Catalytic Reduction ◽  
Low Temperatures ◽  
Catalytic Reduction ◽  
Reduction Of No ◽  
Carbon Honeycomb

Highly dispersed Fe2O3 on carbon nanotubes for low-temperature selective catalytic reduction of NO with NH3

2015 ◽  
Vol 51 (5) ◽  
pp. 956-958 ◽  
Author(s):  
Zhenping Qu ◽  
Lei Miao ◽  
Hui Wang ◽  
Qiang Fu
Keyword(s):  
Carbon Nanotubes ◽  
Low Temperature ◽  
Selective Catalytic Reduction ◽  
Low Temperatures ◽  
Catalytic Reduction ◽  
Reduction Of No ◽  
No Conversion ◽  
Highly Dispersed

Highly dispersed Fe2O3 nanoparticles supported on CNTs showed excellent NO conversion, selectivity and durability towards SO2/H2O at low temperatures (200–325 °C).

scholarly journals Promoted V 2 O 5 /TiO 2 catalysts for selective catalytic reduction of NO with NH 3 at low temperatures

2016 ◽  
Vol 183 ◽  
pp. 282-290 ◽  
Author(s):  
Siva Sankar Reddy Putluru ◽  
Leonhard Schill ◽  
Anita Godiksen ◽  
Raju Poreddy ◽  
Susanne Mossin ◽  
...  
Keyword(s):  
Selective Catalytic Reduction ◽  
Low Temperatures ◽  
Catalytic Reduction ◽  
Reduction Of No
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