Studies on the utilization of post-distillation liquid from Solvay process to carbon dioxide capture and storage

Abstract

In this work, a method of precipitated calcium carbonate production from the post-distillation liquid created in the Solvay process and waste carbon dioxide was proposed and investigated. Precipitation was carried out in a model solution of calcium chloride containing ammonia at various molar ratios in relation to Ca 2+ ions, while gaseous carbon dioxide was supplied to the reactor as a pure gas or as a mixture with air. It was assumed that the reaction was completed when the pH of the reaction mixture reached the value of 7. To characterize precipitated calcium carbonate particles, its size and crystalline form were determined. It was possible to utilize above 80% of calcium ions from a model post-distillation liquid and above 80% of carbon dioxide from a mixed air-CO 2 gas stream using the one-stage precipitation process since the conditions of precipitation were controlled. Calcium carbonate in vaterite form produced in this process can be also a valuable product.

An estimate of the ultralow waste heat available in the European Union

“…In the EU soda ash production is dominated by the Solvay process, which accounts for approximately 91% of soda ash production [72]. Therefore, it was assumed that only the Solvay process is used for the production of soda ash and this applies across the EU.…”

Utilization of Gaseous Carbon Dioxide and Industrial Ca-Rich Waste for Calcium Carbonate Precipitation: A Review

“…In another study, a method for CO 2 sequestration from flue gases using a model post-distillation liquid from Solvay process in the presence of ammonia has been proposed [47]. The scheme of this method is shown in Figure 3.…”

“…An increase in ammonia concentration favored CO 2 and Ca 2+ consumption. About 80% of calcium ions from the post-distillation liquid and about 83% of carbon dioxide from a mixed air-CO 2 gas stream were consumed under the most favorable conditions of this one-stage precipitation process [47]. After filtering off the CaCO 3 particles, a waste solution containing ammonium chloride is formed.…”

“…Another significant problem is the generation of secondary waste, therefore the direction of their management should also be indicated. Only some studies suggest solutions to this problem [37,42,47,101,102].…”

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

“…Soda ash, one of the most basic chemical raw materials used to make glass, detergents, and various chemicals, is produced from natural trona, in addition to the Le Blanc process and the Solvay process 1–3.…”