Influence of Ammonia Concentration on Solvay Soda Process Parameters and Associated Environmental and Energetic Effects

Marcin Cichosz (), Urszula Kiełkowska, Sławomir Łazarski, Łukasz Kiedzik, Marian Szkudlarek, Kazimierz Skowron, Beata Kowalska and Damian Żurawski
Additional contact information
Marcin Cichosz: Department of Chemical Technology, Faculty of Chemistry, Nicolaus Copernicus University in Toruń, 7 Gagarin Street, 87-100 Toruń, Poland
Urszula Kiełkowska: Department of Chemical Technology, Faculty of Chemistry, Nicolaus Copernicus University in Toruń, 7 Gagarin Street, 87-100 Toruń, Poland
Sławomir Łazarski: MCMP Sp. z o.o., 5 Świerkowa Street, 86-300 Grudziądz, Poland
Łukasz Kiedzik: CIECH R&D Sp. z o.o., 62 Wspólna Street, 00-684 Warszawa, Poland
Marian Szkudlarek: CIECH R&D Sp. z o.o., 62 Wspólna Street, 00-684 Warszawa, Poland
Kazimierz Skowron: CIECH R&D Sp. z o.o., 62 Wspólna Street, 00-684 Warszawa, Poland
Beata Kowalska: CIECH R&D Sp. z o.o., 62 Wspólna Street, 00-684 Warszawa, Poland
Damian Żurawski: CIECH R&D Sp. z o.o., 62 Wspólna Street, 00-684 Warszawa, Poland

Energies, 2022, vol. 15, issue 22, 1-19

Abstract: Modifying the absorption process in soda production by the Solvay method requires performing many calculations and determining a new equilibrium process. An increase in ammonia concentration in the reaction solution causes kinetic changes in equilibrium. Changes to the Solvay soda production technology were determined using chemical and instrumental analysis methods. A modification of the process in the form of SAB was introduced. Information allowing the design of an additional absorber and its location in the network of technological devices was presented in the form of parameters using typical chemical engineering assumptions. Spectroscopic and electrochemical techniques were used for this purpose. The increase in total alkalinity due to the addition of ammonia to 135 mmol·20 cm −3 resulted in cooling savings of about 152.4 MJ·Mg −1 of soda. The ammonia desorption rate and process energy parameters were determined for the new system. The temperature requirements for the carbonation column were defined, and in particular, a technique was developed to minimize the cooling of the lower part of the reactor, which reduces the consumption of process energy. Emissions of CO 2 were reduced from 11.70 to 7.85% and NH 3 from 5.52 to 4.89% in exhaust gases from the carbonation column.

Keywords: absorption; ammoniated brine; ammonia-soda industry (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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