Mechanistic and kinetic studies of elemental mercury oxidation over a RuO2/rutile TiO2 catalyst

2017 ◽  
Vol 7 (20) ◽  
pp. 4669-4679 ◽  
Author(s):  
Zhouyang Liu ◽  
Vishnu Sriram ◽  
Can Li ◽  
Joo-Youp Lee
Keyword(s):  
Kinetic Study ◽  
Ruthenium Oxide ◽  
Kinetic Studies ◽  
Elemental Mercury ◽  
Oxidation Catalyst ◽  
Mechanistic Study ◽  
Mercury Oxidation ◽  
Rutile Tio2 ◽  
Tio2 Catalyst

A mechanistic study using in situ DRIFTS and a kinetic study were conducted on a ruthenium oxide based mercury oxidation catalyst.

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

Mechanism and Kinetic Study on Elemental Mercury Oxidation in Flue Gas by Ozone Injection

2017 ◽  
Vol 40 (1) ◽  
pp. 29-36 ◽  
Author(s):  
Zhengcheng Wen ◽  
Zhihua Wang ◽  
Yuan Li ◽  
Kefa Cen
Keyword(s):  
Kinetic Study ◽  
Flue Gas ◽  
Elemental Mercury ◽  
Mercury Oxidation ◽  
Ozone Injection

Deactivation mechanism of KCl and K2SO4 poisoned V2O5/WO3-TiO2 catalyst on gaseous elemental mercury oxidation

Fuel ◽  
2020 ◽  
Vol 278 ◽  
pp. 118245
Author(s):  
Jingyuan Hu ◽  
Guangqian Luo ◽  
Zehua Li ◽  
Mengyuan Liu ◽  
Renjie Zou ◽  
...  
Keyword(s):  
Elemental Mercury ◽  
Mercury Oxidation ◽  
Gaseous Elemental Mercury ◽  
Tio2 Catalyst ◽  
Deactivation Mechanism

Impact of SO2 on elemental mercury oxidation over CeO2–TiO2 catalyst

2013 ◽  
Vol 219 ◽  
pp. 319-326 ◽  
Author(s):  
Hailong Li ◽  
Chang-Yu Wu ◽  
Ying Li ◽  
Liqing Li ◽  
Yongchun Zhao ◽  
...  
Keyword(s):  
Elemental Mercury ◽  
Mercury Oxidation ◽  
Tio2 Catalyst

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.

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