scholarly journals Hydroxylammonium Nitrate Species in a Monopropellant Electrospray Plume

2019 ◽  
Vol 35 (5) ◽  
pp. 922-929 ◽  
Author(s):  
Mitchell J. Wainwright ◽  
Joshua L. Rovey ◽  
Shawn W. Miller ◽  
Benjamin D. Prince ◽  
Steven P. Berg
Keyword(s):  
Hydroxylammonium Nitrate ◽  
Nitrate Species

Hydroxylammonium Nitrate Species in a Monopropellant Electrospray Plume

2019 ◽  
Author(s):  
Mitchell J. Wainwright ◽  
Joshua Rovey ◽  
Shawn W. Miller ◽  
Benjamin D. Prince ◽  
Steven P. Berg
Keyword(s):  
Hydroxylammonium Nitrate ◽  
Nitrate Species

Reactivity of surface nitrate species in the selective reduction of NO with propene over Na[ndash ]H-mordenite as investigated by dynamic FTIR spectroscopy

1998 ◽  
Vol 94 (2) ◽  
pp. 301-307 ◽  
Author(s):  
Atsushi Satsuma ◽  
Takayuki Enjoji ◽  
Ken-ichi Shimizu ◽  
Kazuhiro Sato ◽  
Hisao Yoshida ◽  
...  
Keyword(s):  
Ftir Spectroscopy ◽  
Selective Reduction ◽  
Reduction Of No ◽  
Nitrate Species

scholarly journals Calorimetric study on electrolytic decomposition of hydroxylammonium nitrate (HAN) ternary mixtures

2019 ◽  
Vol 162 ◽  
pp. 66-71
Author(s):  
Wai Siong Chai ◽  
Jitkai Chin ◽  
Kean How Cheah ◽  
Kai Seng Koh ◽  
Tengku F.Wahida Ku Chik
Keyword(s):  
Ternary Mixtures ◽  
Calorimetric Study ◽  
Hydroxylammonium Nitrate

Efficiency of Phosphotungstic Acid Modified Mn-Based Catalysts to Promote Activity and N2 Formation for Selective Catalytic Reduction of NO with Ammonia

2019 ◽  
Vol 17 (7) ◽  
Author(s):  
Yongqiang Huang ◽  
Peixin Li ◽  
Runduo Zhang ◽  
Ying Wei
Keyword(s):  
Selective Catalytic Reduction ◽  
Catalytic Reduction ◽  
Acid Sites ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brønsted Acid Sites ◽  
No Conversion ◽  
Brönsted Acid ◽  
Brönsted Acid Sites ◽  
Nitrate Species

Abstract In this work, the modified Mn-based NH3-SCR (NH3 low-temperature selective catalytic reduction) catalysts with excellent NO conversion and N2 selectivity be designed. N2 yield was hardly more than 75 % over MnOx/TiO2 for NH3-SCR reaction, whereas the NH3-SCR performance has been significantly improved by using 50 wt.% HPW (H3PW12O40)-MnOx/TiO2. 100 % NO conversion and more than 95 % N2 yield was obtained in wide operating temperature window (150–400°C), suggesting that the addition of HPW could effectively improve the NO reduction conversion. After that, the catalysts were further characterized by XRD, H2-TPR, XPS and in situ DRIFT. DRIFT analysis implied that the introduction of HPW significantly improve the capacity of NH4 + species adsorbed on Brønsted acid sites accompanied with inhibiting the formation and consumption of nitrite species. It proved that the non-selective catalytic reduction reaction over HPW-MnOx/TiO2 catalysts are restrained. HPW could accelerate the formation and consumption of NH4 + species adsorbed on Brønsted acid sites with deactivation of nitrate species. In addition, NH3(ad) could be hardly oxidized to NH species and then reacted with nitrate species (L-H mechanism) and gaseous NO (E-R mechanism). More importantly, the oxidation of NH3 was also suppressed, which plays a dominate role to form N2O above 300°C. Besides, the deactivation of potassium poisoning on the SCR activity significantly weakened for modified samples compared to parent catalyst.

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