Assessing the effect of reducing agents on the selective catalytic reduction of NOx over Ag/Al2O3 catalysts

The selective catalytic reduction (SCR) of NOx in the presence of different reducing agents over Ag/Al2O3 prepared by wet impregnation was investigated by probing catalyst activity and using NMR relaxation time analysis.

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The selective catalytic reduction of NOx over a Cu/ZSM-5/SAPO-34 composite catalyst

RSC Advances ◽

10.1039/c5ra22234f ◽

2015 ◽

Vol 5 (127) ◽

pp. 104923-104931 ◽

Cited By ~ 26

Author(s):

Jixing Liu ◽

Weiyu Song ◽

Chi Xu ◽

Jian Liu ◽

Zhen Zhao ◽

...

Keyword(s):

Selective Catalytic Reduction ◽

Mass Fraction ◽

Catalytic Reduction ◽

Composite Catalyst ◽

Composite Catalysts ◽

Scr Of No ◽

Reduction Of Nox ◽

Seed Method ◽

Catalytic Performances

A series of Cu/ZSM-5/SAPO-34 composite catalysts with varying ZSM-5 mass fraction were synthesized using a pre-seed method, and their catalytic performances were tested for selective catalytic reduction (SCR) of NO with NH3.

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Ultralow loading of nanostructured Mn species onto two-dimensional Co3O4 nanosheets for selective catalytic reduction of NOx with NH3

Catalysis Science & Technology ◽

10.1039/d0cy00599a ◽

2020 ◽

Vol 10 (10) ◽

pp. 3450-3457

Author(s):

Kang Zheng ◽

Zhiyuan Zhou ◽

Yongzhao Wang ◽

Zhiling Xin ◽

Zhiliang Zhao ◽

...

Keyword(s):

Selective Catalytic Reduction ◽

Catalytic Reduction ◽

Two Dimensional ◽

Scr Of No ◽

Mn Species ◽

Reduction Of Nox

We report a facile method for dispersing Mn species onto two-dimensional Co3O4 nanosheets at the nanoscale for the selective catalytic reduction (SCR) of NOx with NH3.

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Novel Fe–Ce–Ti catalyst with remarkable performance for the selective catalytic reduction of NOx by NH3

Catalysis Science & Technology ◽

10.1039/c5cy02278a ◽

2016 ◽

Vol 6 (17) ◽

pp. 6688-6696 ◽

Cited By ~ 57

Author(s):

Zhiming Liu ◽

Yuxian Liu ◽

Biaohua Chen ◽

Tianle Zhu ◽

Lingling Ma

Keyword(s):

Selective Catalytic Reduction ◽

Catalytic Reduction ◽

Catalytic Performance ◽

Redox Cycle ◽

Reaction Intermediates ◽

Scr Of No ◽

Reduction Of Nox

The redox cycle (Ce4+ + Fe2+ ↔ Ce3+ + Fe3+) over the Fe–Ce–Ti catalyst contributes to the activation of NOx and NH3 and thus the formation of reaction intermediates, leading to the high catalytic performance for the NH3-SCR of NOx.

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Promotional Effect of Manganese on Selective Catalytic Reduction of NO by CO in the Presence of Excess O2 over M@La–Fe/AC (M = Mn, Ce) Catalyst

Catalysts ◽

10.3390/catal10111322 ◽

2020 ◽

Vol 10 (11) ◽

pp. 1322

Author(s):

Fatemeh Gholami ◽

Zahra Gholami ◽

Martin Tomas ◽

Veronika Vavrunkova ◽

Somayeh Mirzaei ◽

...

Keyword(s):

Selective Catalytic Reduction ◽

Oxygen Vacancies ◽

Catalytic Reduction ◽

Catalyst Activity ◽

Double Exchange ◽

Catalytic Performance ◽

Redox Equilibrium ◽

Metal Site ◽

Promotional Effect ◽

Scr Of No

The catalytic performance of a series of La-Fe/AC catalysts was studied for the selective catalytic reduction (SCR) of NO by CO. With the increase in La content, the Fe2+/Fe3+ ratio and amount of surface oxygen vacancies (SOV) in the catalysts increased; thus the catalytic activity improved. Incorporating the promoters to La3-Fe1/active carbon (AC) catalyst could affect the catalyst activity by changing the electronic structure. The increase in Fe2+/Fe3+ ratio after the promoter addition is possibly due to the extra synergistic interaction of M (Mn and Ce) and Fe through the redox equilibrium of M3+ + Fe3+ ↔ M4+ + Fe2+. This phenomenon could have improved the redox cycle, enhanced the SOV formation, facilitated NO decomposition, and accelerated the CO-SCR process. The presence of O2 enhanced the formation of the C(O) complex and improved the activation of the metal site. Mn@La3-Fe1/AC catalyst revealed an excellent NO conversion of 93.8% at 400 °C in the presence of 10% oxygen. The high catalytic performance of MnOx and double exchange behavior of Mn3+ and Mn4+ can increase the number of SOV and improve the catalytic redox properties.

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The enhanced performance of a CeSiOx support on a Mn/CeSiOx catalyst for selective catalytic reduction of NOx with NH3

RSC Advances ◽

10.1039/c6ra18821d ◽

2016 ◽

Vol 6 (86) ◽

pp. 82707-82715 ◽

Cited By ~ 11

Author(s):

Wei Li ◽

Rui-tang Guo ◽

Shu-xian Wang ◽

Wei-guo Pan ◽

Qi-lin Chen ◽

...

Keyword(s):

Selective Catalytic Reduction ◽

Catalytic Reduction ◽

Impregnation Method ◽

Wet Impregnation ◽

Reduction Of No ◽

Reduction Of Nox ◽

Wet Impregnation Method

A series of Mn/CeSiOx catalysts were prepared by the wet impregnation method and used for selective catalytic reduction of NO with NH3.

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Cu-exchanged RTH-type zeolites for NH3-selective catalytic reduction of NOx: Cu distribution and hydrothermal stability

Catalysis Science & Technology ◽

10.1039/c8cy01933a ◽

2019 ◽

Vol 9 (1) ◽

pp. 106-115 ◽

Cited By ~ 15

Author(s):

Yulong Shan ◽

Xiaoyan Shi ◽

Jinpeng Du ◽

Yunbo Yu ◽

Hong He

Keyword(s):

Selective Catalytic Reduction ◽

Catalytic Reduction ◽

Hydrothermal Stability ◽

Scr Of No ◽

Reduction Of Nox

The Cu-exchanged RTH-type zeolites (Cu-RTH) were applied in ammonia-selective catalytic reduction (NH3-SCR) of NOx.

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Fe2O3@SiTi core–shell catalyst for the selective catalytic reduction of NOx with NH3: activity improvement and HCl tolerance

Catalysis Science & Technology ◽

10.1039/c8cy00810h ◽

2018 ◽

Vol 8 (13) ◽

pp. 3313-3320 ◽

Cited By ~ 15

Author(s):

Huazhen Chang ◽

Tao Zhang ◽

Hao Dang ◽

Xiaoyin Chen ◽

Yanchen You ◽

...

Keyword(s):

Selective Catalytic Reduction ◽

Catalytic Reduction ◽

Core Shell ◽

Scr Of No ◽

Reduction Of Nox

A core–shell structured Fe2O3@SiTi catalyst with a SiTi shell and Fe2O3 core was prepared and used for the selective catalytic reduction (SCR) of NOx with NH3.

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Mn/SAPO-34 as an efficient catalyst for the low-temperature selective catalytic reduction of NOx with NH3

RSC Advances ◽

10.1039/c7ra05165d ◽

2017 ◽

Vol 7 (51) ◽

pp. 32146-32154 ◽

Cited By ~ 3

Author(s):

Chengkai Pang ◽

Yuqun Zhuo ◽

Qiyu Weng

Keyword(s):

Low Temperature ◽

Selective Catalytic Reduction ◽

Catalytic Reduction ◽

Excess Oxygen ◽

Efficient Catalyst ◽

Scr Of No ◽

Reduction Of Nox

A series of Mn-exchanged SAPO-34 catalysts were synthesized and developed as catalysts for the low temperature selective catalytic reduction (SCR) of NO with ammonia in the presence of excess oxygen.

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