Mathematical Equations of Thermodynamic Probability of Thermal Decomposition of Ammonia

Abstract

Technical solutions have been developed to create a technology for obtaining calcium cyanamide from lime, carbonate anhydride and industrial ammonia. A technological scheme for obtaining nitrogen fertilizer and an effective defoliant - calcium cyanamide has been developed and the optimal technological parameters of the process at the pilot plant an experimental batch of calcium cyanamide was produced.

Introduction

I. INTRODUCTION

The basis of thermodynamic calculations of the thermal decomposition of ammonia were given below, derived by us mathematically by multiplying by the reduced coefficient 4.184, the results of thermodynamic calculations were converted from the metric system of measures to the international SI system.

At 373K the value of the decimal logarithm had a negative sign (Table 3.4), and at 458K it was equal to zero. With a further increase in temperature, a slight increase was observed and at 1073K the value of the decimal logarithm was - + 3.4285. At a temperature of 1073K, which is optimal in the process of obtaining calcium cyanamide from calcium oxide, carbon dioxide and ammonia [119, p. 5], the value of the Gibbs energy change is -70433.87J/mol, which follows from Fig.3.3.

Based on the methodology used,thermodynamic calculations were carried out on the basis of the old constants. According to the old physicochemical constants, the temperature of the onset of ammonia decomposition turned out to be 456K, and according to the new ones, it was 459K [119, p. 6].

Thus, the ammonia decomposition temperature of 459K can be considered more reliable, since it was determined according to new literature data.

II.  FINDINGS

1. Thermodynamic studies of the thermal decomposition of ammonia according to new physical and chemical constants have shown that the decomposition temperature of ammonia 459K can be considered more reliable, since it is determined according to new literature data.
2. Thermodynamically calculated values ??of the change in the Gibbs energy showed that their absolute values ??decrease with increasing temperature.
3. The results of computer thermodynamic calculations show that the thermal effect of the reaction in the temperature range of 873–1473 K is endothermic, the reaction proceeds with external heat absorption.

References

[1] Toirov Z.K., Panjiev O.Kh., Bozorov O.N., Bobokulov A.N. \"Chemical Technology of Inorganic Substances.\" Textbook. - T. - \"Philosophers.\" - 2018. - p.27-30. [2] Panzhiev A.?., Panzhiev O.?. Thermodynamic Studies of the Possibility of Free Carbon Formation during the Synthesis of Calcium Cyanamide by the Carbide-Free Method. International Journal of Progressive Sciences and Technologies (IJPSAT), International Journals of Sciences and High Technologies. 2 September. 2020. 111-116-pp [3] Panzhiev A.?., Panzhiev O.?. Kinetics of calcium Cyanamid obtaining process frocess from lime, carbon dioxide and ammonia.International Journal on Integrated Education. Vol. 3 ? 9 (2020): IJIE. 260-263-pp [4] Panzhiev A.?., Panzhiev O.?.The expander gas and ammonia ratio infiuence on the calcium cyanamide yield. International Journal of Trend in Scientifin Research and Development (IJPSAT),Special Issue on Inter nationl Research Development and Scientific Excellence inAcademik Life Available Online; www.ijtsrd.com e-ISSN; 2456-6470. 2021. January [5] Panzhiev A.?. , Panzhiev O.?., Toirov. Z.K,The impact of temperature on the syntheses of calcium cyanamide from ammonia, carbon dioxide and lime obtaiened from jamansai limestone. Iternational conference n integrated innovative evelopment of Zarafshan egion; Achivements, hallenges and prospects 27-28 november, Uzbekstan 2019,369-372-?? [6] Panjiev A.Kh., Panjiev O.Kh., Toirov Z.K. Influence of temperature on the synthesis of calcium cyanamide from ammonia, carbon dioxide of lime obtained from Jamakay limestone. UNIVERSUM scientific journal issue N2. (68), February 2020, Moscow, 68-71s [7] Panzhiev A.?., Panzhiev O.?., Norkulov M.B. The effect of temperature on the synthesis of calciu cyanamide and tne composition of the exhaust gases. International cngineering journal for researeb and debelopment. Published;may- 28, 2020 353-362-pp [8] Panjiev A.?., Panjiev O.?. Thermodynamic Studies of the Possibility of Free Carbon Formation during the Synthesis of Calcium Cyanamide by the Carbide-Free Method. International Journal of Progressive Sciences and Technologies (IJPSAT), International Journals of Sciences and High Technologies. 2 September. 2020. 111-116-pp [9] Panjiev A.?., Panjiev O.?. Kinetics of calcium Cyanamid obtaining process frocess from lime,carbon dioxide and ammonia.International Journal on Integrated Education. Vol. 3 ? 9 (2020): IJIE. 260-263-pp

Copyright

Copyright © 2022 O. Kh. Panjiev, A. Kh. Panjiev, M. J. Juraeva, D. E. Kholbozorova . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.