Modeling of an electrochemical reactor aimed for calcium hydroxide production in aqueous media
Anthropogenic CO2 emissions from cement and lime production are mainly due to the decarbonation of the limestone. Alongside usual CO2 capture technologies, an innovative electrochemical reactor model designed to directly produce calcium hydroxide and hydrogen through water electrolysis could be an a...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2025-01-01
|
| Series: | MATEC Web of Conferences |
| Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2025/01/matecconf_sfgp2024_06001.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Anthropogenic CO2 emissions from cement and lime production are mainly due to the decarbonation of the limestone. Alongside usual CO2 capture technologies, an innovative electrochemical reactor model designed to directly produce calcium hydroxide and hydrogen through water electrolysis could be an alternative technology for reducing CO2 emissions, while eliminating carbon dioxide emissions from combustion in decarbonation kilns in the lime industry.
The development of a numerical model capable of simulating electrochemical and chemical phenomena within the reactor, identifying key parameters and optimising operating conditions for a pilot reactor is an important step. This study focuses on characterising material flows in the reactor and minimising energy consumption.
The model developed in this work can establish energy and material balances within the reactor. In particular, it analyses the effects of inter-electrode distance and electrolyte concentration on energy performance. The simulations show the influence of pH and calcium carbonate dissolution kinetics, as well as the production of calcium hydroxide as a function of the applied current. It is a first step towards the design of an industrial pilot reactor. The model provides a good approximation of the major physical phenomena and enables new configurations to be tested. However, certain simplifications, such as the neglecting the precise geometry of the reactor and the idealisation of membrane behaviour, will require further work to improve the model’s performance. |
|---|---|
| ISSN: | 2261-236X |