TY - JOUR
T1 - Thermal dissociation kinetics of solid ammonium carbonate for use in NH3-SCR systems
AU - Mohan, Sooraj
AU - Dinesha, P.
N1 - Funding Information:
The authors thank the Vision Group on Science and Technology (VGST), Government of Karnataka, India, for funding the project (vide grant no. GRD-911). The open-access funding for this article is provided by Manipal Academy of Higher Education, Manipal.
Funding Information:
The authors thank the Vision Group on Science and Technology (VGST), Government of Karnataka, India, for funding the project (vide grant no. GRD-911). The open-access funding for this article is provided by Manipal Academy of Higher Education, Manipal.
Publisher Copyright:
© 2022, The Author(s).
PY - 2022/10
Y1 - 2022/10
N2 - Selective catalytic reduction (SCR) systems using solid ammonia carriers like carbamates, carbonates, etc., have gained interest in the recent past for NOx abatement from compression ignition engines. Solid ammonia carriers have successfully demonstrated their use in SCR systems. In this experimental study, the thermal dissociation study of ammonium carbonate is made using nonisothermal thermogravimetric analysis. Ammonium carbonate is subjected to three heating rates, ∅ of 2, 4, and 8 K/min. The corresponding highest rates of reaction are obtained at temperatures (Tp) of 96, 118, and 128 °C, respectively. At these points, the mass of the samples has been reduced to 1/3rd of the initial mass. From the Arrhenius plots, the average activation energy obtained is 77.39 kJ/mol which is 15% higher than that of ammonium carbamate. An expression for Tp as a function of activation energy, ∅ , and order of the reaction is developed using kinetic model. The model can predict the temperatures at which the reaction rates are maximum for a given heating rate.
AB - Selective catalytic reduction (SCR) systems using solid ammonia carriers like carbamates, carbonates, etc., have gained interest in the recent past for NOx abatement from compression ignition engines. Solid ammonia carriers have successfully demonstrated their use in SCR systems. In this experimental study, the thermal dissociation study of ammonium carbonate is made using nonisothermal thermogravimetric analysis. Ammonium carbonate is subjected to three heating rates, ∅ of 2, 4, and 8 K/min. The corresponding highest rates of reaction are obtained at temperatures (Tp) of 96, 118, and 128 °C, respectively. At these points, the mass of the samples has been reduced to 1/3rd of the initial mass. From the Arrhenius plots, the average activation energy obtained is 77.39 kJ/mol which is 15% higher than that of ammonium carbamate. An expression for Tp as a function of activation energy, ∅ , and order of the reaction is developed using kinetic model. The model can predict the temperatures at which the reaction rates are maximum for a given heating rate.
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U2 - 10.1007/s11696-022-02347-1
DO - 10.1007/s11696-022-02347-1
M3 - Article
AN - SCOPUS:85133585202
SN - 0366-6352
VL - 76
SP - 6551
EP - 6556
JO - Chemical Papers
JF - Chemical Papers
IS - 10
ER -