Multi-phase coexisting metal oxide derived by MOFs for the CO-SCR reaction at low temperature and In situ DRIFTS study on reaction mechanism

2021 ◽  
pp. 152277
Author(s):  
Runqi Zhao ◽  
Xiaoling Wei ◽  
Bingxian Chu ◽  
Kean Chen ◽  
Qiuju Qin ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Low Temperature ◽  
Metal Oxide ◽  
In Situ Drifts ◽  
Multi Phase

Low temperature high activity of M (M = Ce, Fe, Co, Ni) doped M-Mn/TiO2 catalysts for NH3-SCR and in situ DRIFTS for investigating the reaction mechanism

2020 ◽  
Vol 515 ◽  
pp. 146014 ◽  
Author(s):  
Shangzhi Xie ◽  
Lulu Li ◽  
Lijian Jin ◽  
Yaohui Wu ◽  
Hao Liu ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Low Temperature ◽  
High Activity ◽  
In Situ Drifts ◽  
Nh3 Scr

MOF-74-M (M = Mn, Co, Ni, Zn, MnCo, MnNi, and MnZn) for Low-Temperature NH3-SCR and In Situ DRIFTS Study Reaction Mechanism

2020 ◽  
Vol 12 (43) ◽  
pp. 48476-48485
Author(s):  
Shangzhi Xie ◽  
Qiuju Qin ◽  
Hao Liu ◽  
Lijian Jin ◽  
Xiaoling Wei ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Low Temperature ◽  
In Situ Drifts ◽  
Nh3 Scr

Insight into the reaction mechanism over PMoA for low temperature NH3-SCR: A combined In-situ DRIFTs and DFT transition state calculations

2021 ◽  
Vol 412 ◽  
pp. 125258
Author(s):  
Yong Jia ◽  
Jin Jiang ◽  
Ruizi Zheng ◽  
Lina Guo ◽  
Jing Yuan ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Low Temperature ◽  
Transition State ◽  
In Situ Drifts ◽  
Nh3 Scr ◽  
Insight Into

scholarly journals Insight into the Promoting Role of Er Modification on SO2 Resistance for NH3-SCR at Low Temperature over FeMn/TiO2 Catalysts

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 618
Author(s):  
Huan Du ◽  
Zhitao Han ◽  
Xitian Wu ◽  
Chenglong Li ◽  
Yu Gao ◽  
...  
Keyword(s):  
Low Temperature ◽  
Catalyst Surface ◽  
Impregnation Method ◽  
In Situ Drifts ◽  
Tio2 Catalyst ◽  
Nh3 Scr ◽  
Nh3 Adsorption ◽  
So2 Resistance ◽  
Fast Scr

Er-modified FeMn/TiO2 catalysts were prepared through the wet impregnation method, and their NH3-SCR activities were tested. The results showed that Er modification could obviously promote SO2 resistance of FeMn/TiO2 catalysts at a low temperature. The promoting effect and mechanism were explored in detail using various techniques, such as BET, XRD, H2-TPR, XPS, TG, and in-situ DRIFTS. The characterization results indicated that Er modification on FeMn/TiO2 catalysts could increase the Mn4+ concentration and surface chemisorbed labile oxygen ratio, which was favorable for NO oxidation to NO2, further accelerating low-temperature SCR activity through the “fast SCR” reaction. As fast SCR reaction could accelerate the consumption of adsorbed NH3 species, it would benefit to restrain the competitive adsorption of SO2 and limit the reaction between adsorbed SO2 and NH3 species. XPS results indicated that ammonium sulfates and Mn sulfates formed were found on Er-modified FeMn/TiO2 catalyst surface seemed much less than those on FeMn/TiO2 catalyst surface, suggested that Er modification was helpful for reducing the generation or deposition of sulfate salts on the catalyst surface. According to in-situ DRIFTS the results of, the presence of SO2 in feeding gas imposed a stronger impact on the NO adsorption than NH3 adsorption on Lewis acid sites of Er-modified FeMn/TiO2 catalysts, gradually making NH3-SCR reaction to proceed in E–R mechanism rather than L–H mechanism. DRIFTS.

Exploration of reaction mechanism between acid gases and elemental mercury on the CeO2–WO3/TiO2 catalyst via in situ DRIFTS

Fuel ◽  
2019 ◽  
Vol 239 ◽  
pp. 162-172 ◽  
Author(s):  
Guoliang Li ◽  
Shuxiao Wang ◽  
Qingru Wu ◽  
Junhua Li ◽  
Xiaoqing You ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Elemental Mercury ◽  
Acid Gases ◽  
In Situ Drifts ◽  
Tio2 Catalyst

Rate-dependent electrochemical reaction mechanism of spinel metal oxide anode studied by in situ TEM

2018 ◽  
Vol 763 ◽  
pp. 349-354 ◽  
Author(s):  
Xiaopeng Cheng ◽  
Yonghe Li ◽  
Huifeng Shi ◽  
Junxia Lu ◽  
Yuefei Zhang
Keyword(s):  
Reaction Mechanism ◽  
Metal Oxide ◽  
Electrochemical Reaction ◽  
In Situ Tem ◽  
Rate Dependent ◽  
Metal Oxide Anode ◽  
Oxide Anode
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