# Polymeric Membrane Contactors for CO2 Separation: A Systematic Literature Analysis of the Impact of Absorbent Temperature

## TL;DR

This paper analyzes how absorbent temperature affects CO2 separation performance using polymeric membrane contactors, finding that higher temperatures reduce physical absorption but improve chemical absorption.

## Contribution

The study establishes an empirical law showing a 3% performance change per 10°C for physical and chemical absorption in CO2 separation.

## Key findings

- For every 10°C increase in temperature, physical absorption performance decreases by approximately 3%.
- Chemical absorption performance improves by approximately 3% with a 10°C temperature increase.
- The empirical relationship was validated using 104 measurements from 12 studies.

## Abstract

Global warming, driven significantly by carbon dioxide (CO2) emissions, necessitates immediate climate action. Consequently, CO2 capture is essential for mitigating carbon output from industrial and power generation processes. This study investigates the effect of absorbent temperature on CO2 separation performance using gas–liquid polymeric hollow fiber membrane (HFM) contactors. It summarizes the relationship between liquid-phase temperature and CO2 capture efficiency across various physical and chemical absorption processes. Twelve relevant studies (nine experimental, three mathematical), providing a comprehensive database of 104 individual measurements, were rigorously analyzed. Liquid-phase temperature significantly influences CO2 separation performance in HFM contactors. In particular, the present analysis reveals that, overall, for every 10 °C temperature increase, physical absorption performance decreases by approximately 3%, while chemical absorption performance improves by 3%, regardless of other parameters. This empirical law was confirmed by direct comparisons with additional experimental results. Strategies for further development of these processes are also proposed.