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Modeling and Simulation for the Production Process of Soda Ash by the Ammonium Sulfate‐Soda Method

2021; Wiley; Volume: 44; Issue: 10 Linguagem: Inglês

10.1002/ceat.202100145

1521-4125

Kyong Song Pak, Sun Il Son, Bong Hak Li, Myong Pok Jang, Paeksan Jang, Kuk Chol Kim, Sung Nam Pak,

Industrial Gas Emission Control

Abstract The ammonium sulfate‐soda method is a procedure that produces soda ash and the by‐product ammonium sulfate, using mirabilite as the raw material. Here, a process for producing soda ash by the ammonium sulfate‐soda method is proposed. Based on the reaction mechanisms occurring in the Na 2 SO 4 ‐NH 3 ‐CO 2 ‐H 2 O system and the kinetic‐thermodynamic data of the CO 2 absorption process using aqueous NH 3 , the soda ash production process is modeled and simulated using Aspen Plus. The effects of various process parameters (the concentration of the raw mirabilite solution, the amounts of NH 3 and CO 2 flowing into the process, and the recycle ratio of CO 2 exhausted from the NaHCO 3 calciner, etc.) on the process performance are investigated.