Extraframework Cation Locations in Cu-UZM-35 NH3-SCR Catalyst

2018 ◽  
Vol 122 (51) ◽  
pp. 29330-29337 ◽  
Author(s):  
Nak Ho Ahn ◽  
Jiho Shin ◽  
Taekyung Ryu ◽  
Suk Bong Hong
Keyword(s):  
Scr Catalyst ◽  
Nh3 Scr ◽  
Extraframework Cation

scholarly journals AFX Zeolite for Use as a Support of NH3-SCR Catalyst Mining through AICE Joint Research Project of Industries–Academia–Academia

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 163
Author(s):  
Masaru Ogura ◽  
Yumiko Shimada ◽  
Takeshi Ohnishi ◽  
Naoto Nakazawa ◽  
Yoshihiro Kubota ◽  
...  
Keyword(s):  
High Performance ◽  
Ionic Species ◽  
Research Project ◽  
Joint Research ◽  
Structure Directing Agent ◽  
Scr Catalyst ◽  
Organic Structure ◽  
Nh3 Scr ◽  
Joint Research Project ◽  
The One

This paper introduces a joint industries–academia–academia research project started by researchers in several automobile companies and universities working on a single theme. Our first target was to find a zeolite for NH3-SCR, that is, zeolite mining. Zeolite AFX, having the same topology of SSZ-16, was found to be the one of the zeolites. SSZ-16 can be synthesized by using an organic structure-directing agent such as 1,1′-tetramethylenebis(1-azonia-4-azabicyclo[2.2.2]octane; Dab-4, resulting in the formation of Al-rich SSZ-16 with Si/Al below five. We found that AFX crystallized by use of N,N,N′,N′-tetraethylbicyclo[2.2.2]oct-7-ene-2,3:5,6-dipyrrolidinium ion, called TEBOP in this study, had the same analog as SSZ-16 having Si/Al around six and a smaller particle size than SSZ-16. The AFX demonstrated a high performance for NH3-SCR as the zeolitic support to load a large number of divalent Cu ionic species with high hydrothermal stability.

Redistributing Cu species in Cu-SSZ-13 zeolite as NH3-SCR catalyst via a simple ion-exchange

2021 ◽  
Author(s):  
Ben Liu ◽  
Nangui Lv ◽  
Chan Wang ◽  
Hongwei Zhang ◽  
Yuanyuan Yue ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Scr Catalyst ◽  
Nh3 Scr

Low-temperature Shift DeNOx Activity of Nanoflake V2O5 loaded WO3/TiO2 as NH3-SCR Catalyst

2022 ◽  
pp. 109191
Author(s):  
Jae Gu Heo ◽  
Mahboob Ullah ◽  
Myoung-Pyo Chun ◽  
Yong Sik Chu ◽  
Seong Gwan Seo ◽  
...  
Keyword(s):  
Low Temperature ◽  
Temperature Shift ◽  
Scr Catalyst ◽  
Nh3 Scr

scholarly journals The Effect of Tourmaline on SCR Denitrification Activity of MnOx/TiO2 at Low Temperature

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1020
Author(s):  
Yizhe Helian ◽  
Suping Cui ◽  
Xiaoyu Ma
Keyword(s):  
Low Temperature ◽  
Catalytic Reduction ◽  
Catalytic Performance ◽  
Scr Catalyst ◽  
Highly Efficient ◽  
Nh3 Scr ◽  
Catalytic Material ◽  
Acidic Sites ◽  
Denitrification Activity ◽  
The Stability

Selective catalytic reduction (SCR) technology is the most widely used flue gas denitration technology at present. The stability of a catalyst is the main factor limiting the development of this technology. In this study, an environmentally friendly and highly efficient NH3-SCR catalyst was prepared by coprecipitation method from acidolysis residue of industrial waste and tourmaline. We found that the addition of tourmaline has an important impact on the denitration activity of the catalytic material. The NOx conversion exceeded 97% at 200 °C with the dosage of 10% tourmaline, which is about 7% higher than that without doping. The improvement of catalytic performance was mostly attributed to the permanent electrodes of tourmaline, which effectively promotes the dispersion of MnOx/TiO2 catalytic materials, increases the number of acidic sites and changes the valence distribution of manganese ions in products, which speeds up the diffusion of protons and ions, resulting in the acceleration of redox reaction. These as-developed tourmaline-modified MnOx/TiO2 materials have been demonstrated to be promising as a new type of highly efficient low-temperature NH3-SCR catalyst.

A basic comprehensive study on synergetic effects among the metal oxides in CeO2-WO3/TiO2 NH3-SCR catalyst

2020 ◽  
pp. 127833
Author(s):  
Xuesong Liu ◽  
Peng Jiang ◽  
Yong Chen ◽  
Yaoguang Wang ◽  
Qiaoling Ding ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Scr Catalyst ◽  
Synergetic Effects ◽  
Nh3 Scr ◽  
Comprehensive Study

scholarly journals Influence of Na, P and (Na + P) poisoning on a model copper-ferrierite NH3-SCR catalyst

2019 ◽  
Vol 250 ◽  
pp. 355-368 ◽  
Author(s):  
Marie-Laure Tarot ◽  
Eduard Emil Iojoiu ◽  
Vincent Lauga ◽  
Daniel Duprez ◽  
Xavier Courtois ◽  
...  
Keyword(s):  
Scr Catalyst ◽  
Nh3 Scr

Kinetic modeling of Fe-BEA as NH3-SCR catalyst-effect of phosphorous

AIChE Journal ◽  
2014 ◽  
Vol 61 (1) ◽  
pp. 215-223 ◽  
Author(s):  
Soran Shwan ◽  
Louise Olsson ◽  
Magnus Skoglundh ◽  
Jonas Jansson
Keyword(s):  
Kinetic Modeling ◽  
Scr Catalyst ◽  
Nh3 Scr ◽  
Catalyst Effect

Chemical deactivation of Fe-BEA as NH3-SCR catalyst—Effect of phosphorous

2014 ◽  
Vol 147 ◽  
pp. 111-123 ◽  
Author(s):  
Soran Shwan ◽  
Jonas Jansson ◽  
Louise Olsson ◽  
Magnus Skoglundh
Keyword(s):  
Scr Catalyst ◽  
Nh3 Scr ◽  
Catalyst Effect

Cu-exchanged Al-rich SSZ-13 zeolite from organotemplate-free synthesis as NH3-SCR catalyst: Effects of Na+ ions on the activity and hydrothermal stability

2017 ◽  
Vol 217 ◽  
pp. 421-428 ◽  
Author(s):  
Zhenchao Zhao ◽  
Rui Yu ◽  
Rongrong Zhao ◽  
Chuan Shi ◽  
Hermann Gies ◽  
...  
Keyword(s):  
Hydrothermal Stability ◽  
Scr Catalyst ◽  
Nh3 Scr ◽  
Na Ions

SO2 poisoning impact on the NH3-SCR reaction over a commercial Cu-SAPO-34 SCR catalyst

2014 ◽  
Vol 156-157 ◽  
pp. 371-377 ◽  
Author(s):  
Li Zhang ◽  
Di Wang ◽  
Yong Liu ◽  
Krishna Kamasamudram ◽  
Junhui Li ◽  
...  
Keyword(s):  
Scr Catalyst ◽  
Nh3 Scr ◽  
So2 Poisoning
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