# Experimental data for the rate of CO2 release from seawater under vacuum at 30°C and ambient pressure at 100°C

## TL;DR

This paper presents experimental data on how quickly CO₂ is released from seawater under vacuum at 30°C and under ambient pressure at 100°C.

## Contribution

The study provides new experimental data on CO₂ release rates from seawater under two distinct thermal and pressure conditions.

## Key findings

- CO₂ release rates were measured under vacuum at 30°C and ambient pressure at 100°C.
- pH and total inorganic carbon (TIC) were monitored to infer CO₂ release dynamics.
- The dataset supports the design of marine Carbon Dioxide Removal (mCDR) equipment.

## Abstract

This dataset provides experimental measurements to quantify the rate of CO₂ release from (sea)water. Two different conditions were tested: vacuum pressure and 30°C and ambient pressure and 100°C. Data were collected using 1) a vacuum setup consisting of vacuum flask, placed in a thermostat bath at 30°C connected to a vacuum pump, protected by a cold trap and 2) a beaker without vacuum setup for the atmospheric experiments. Rates were inferred by measuring pH and the total inorganic carbon (TIC) in the water. The latter was measured ex-situ using a TIC analyzer. The TIC concentrations were corrected for reduced volume of the residue to the original volume to determine the actual CO2 release after each timestep. Actual seawater samples were utilized to determine the relationship between CO₂ release and water residence time under vacuum and ambient pressure boiling circumstances. The dataset includes variables such as CO₂ release rates and pH changes over time that the sample was subject to boiling conditions, providing valuable insights for designing process equipment for marine Carbon Dioxide Removal (mCDR) applications (for example in evaporative desalination processes) in both atmospheric and sub atmospheric pressures.