Suitability of pyrolusite as additive to activated coke for low‐temperature NO removal

2017 ◽  
Vol 93 (3) ◽  
pp. 690-697 ◽  
Author(s):  
Lin Yang ◽  
Wenju Jiang ◽  
Lu Yao ◽  
Xia Jiang ◽  
Jianjun Li
Keyword(s):  
Low Temperature ◽  
No Removal ◽  
Activated Coke

scholarly journals Co-blending modification of activated coke using pyrolusite and titanium ore for low-temperature NOx removal

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Lin Yang ◽  
Lu Yao ◽  
Yuguo Lai ◽  
Xia Jiang ◽  
Wenju Jiang
Keyword(s):  
Mass Transfer ◽  
Electron Transfer ◽  
Low Temperature ◽  
Active Sites ◽  
Surface Acidity ◽  
Catalytic Performance ◽  
Bridge Structure ◽  
Nox Removal ◽  
No Removal ◽  
Activated Coke

Abstract Activated coke (AC) has great potential in the field of low-temperature NO removal (DeNOx), especially the branch prepared by blending modification. In this study, the AC-based pyrolusite and/or titanium ore blended catalysts were prepared and applied for DeNOx. The results show blending pyrolusite and titanium ore promoted the catalytic performance of AC (Px@AC, Tix@AC) clearly, and the co-blending of two of them showed a synergistic effect. The (P/Ti-1/2)15@AC performed the highest NO conversion of 66.4%, improved 16.9% and 16.0% respectively compared with P15@AC and Ti15@AC. For the (P/Ti-1/2)15@AC DeNOx, its relative better porous structure (SBET = 364 m2/g, Vmic = 0.156 cm3/g) makes better mass transfer and more active sites exposure, stronger surface acidity (C–O, 19.43%; C=O, 4.16%) is more favorable to the NH3 adsorption, and Ti, Mn and Fe formed bridge structure fasted the lactic oxygen recovery and electron transfer. The DeNOx of (P/Ti-1/2)15@AC followed both the E–R and L–H mechanism, both the gaseous and adsorbed NO reacted with the activated NH3 due to the active sites provided by both the carbon and titanium.

Excellent low-temperature NH3-SCR NO removal performance and enhanced H2O resistance by Ce addition over the Cu0.02Fe0.2CeyTi1-yOx (y = 0.1, 0.2, 0.3) catalysts

Chemosphere ◽  
2020 ◽  
Vol 243 ◽  
pp. 125309 ◽  
Author(s):  
Shibo Ma ◽  
Huansheng Tan ◽  
Yushi Li ◽  
Peiqiang Wang ◽  
Chen Zhao ◽  
...  
Keyword(s):  
Low Temperature ◽  
No Removal ◽  
Nh3 Scr ◽  
Scr No

Improved Low‐Temperature Activity and H 2 O Resistance of Fe‐Doped Mn−Eu Catalysts for NO Removal by NH 3 −SCR

ChemCatChem ◽  
2019 ◽  
Vol 11 (19) ◽  
pp. 4954-4965 ◽  
Author(s):  
Mingyu Guo ◽  
Peipei Zhao ◽  
Qingling Liu ◽  
Caixia Liu ◽  
Jinfeng Han ◽  
...  
Keyword(s):  
Low Temperature ◽  
No Removal

Enhancement of low-temperature activity and sulfur resistance of Fe 0.3 Mn 0.5 Zr 0.2 catalyst for NO removal by NH 3 -SCR

2017 ◽  
Vol 325 ◽  
pp. 114-123 ◽  
Author(s):  
Ningjie Fang ◽  
Jiaxiu Guo ◽  
Song Shu ◽  
Hongdi Luo ◽  
Yinghao Chu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Sulfur Resistance ◽  
No Removal

Simultaneous removal of gaseous CO and elemental mercury over Cu-Co modified activated coke at low temperature

2021 ◽  
Vol 101 ◽  
pp. 36-48 ◽  
Author(s):  
Fengyu Gao ◽  
Hao Yan ◽  
Xiaolong Tang ◽  
Honghong Yi ◽  
Shunzheng Zhao ◽  
...  
Keyword(s):  
Low Temperature ◽  
Elemental Mercury ◽  
Simultaneous Removal ◽  
Activated Coke

A Novel MnOx Supported Palygorskite SCR Catalyst for Lower Temperature NO Removal from Flue Gases

2011 ◽  
Vol 356-360 ◽  
pp. 974-979 ◽  
Author(s):  
Xian Long Zhang ◽  
Bo Wen Shi ◽  
Xue Ping Wu ◽  
Wei Ping Jiang ◽  
Bao Jun Yang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Manganese Oxide ◽  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Flue Gases ◽  
Scr Catalyst ◽  
No Removal ◽  
Highly Active ◽  
Lower Temperature ◽  
Scr Of Nox

Palygorskite supported manganese oxide catalysts (MnOx/PG) were prepared for lower temperature selective catalytic reduction (SCR) of NOx by NH3. Catalyst’s SCR activity was estimated at varied temperatures. Catalyst’s properties were characterized by XRD, NH3adsorption and TPD. Results showed that MnOx/PG catalyst was highly active for SCR at low-temperature. It was also found that NH3 was mainly adsorbed on palygorskite in two forms. Weakly adsorbed NH3, which was seldom inhibited by loading of MnOx, but was more favorable to SCR. Whereas strongly adsorbed NH3was more likely to be inhibited by MnOx loading but was inessential for SCR.

Sign in / Sign up

Export Citation Format

Share Document