Open Access

ARTICLE

Carbon Capture from Flue Gas Based on the Combination of Non-Contact Hydrophobic Porous Ceramic Membrane and Bubbling Absorption

by Yongde Luo, Jiang Jin^*, Hua Zhang^*

College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 211816, China

* Corresponding Authors: Jiang Jin. Email: ; Hua Zhang. Email:

(This article belongs to the Special Issue: Porous Materials for Sustainable Development)

Journal of Renewable Materials 2023, 11(7), 3143-3153. https://doi.org/10.32604/jrm.2023.027396

Received 01 November 2022; Accepted 23 December 2022; Issue published 05 June 2023

Abstract

A hybrid system combined with a non-contact membrane and bubbling absorption is proposed to capture CO₂ from flue gas. The non-contact way of membrane and liquid absorbent effectively avoids the reduction of gas diffusion flux through the membrane. High-porosity ceramic membranes in hybrid systems are used for gas-solid separation in fuel gas treatment. Due to the high content of H₂O and cement dust in the flue gas of the cement plant, the membrane is hydrophobically modified by polytetrafluoroethylene (PTFE) to improve its anti-water, anti-fouling, and self-cleaning performances. The results show that the diffusion flux of CO₂ through the membrane is still higher than 7.0 × 10⁻³ mol/m² s (20% CO₂ concentration) even under the influence of water and cement dust. In addition, slaked lime selected as the absorbent is cheap and the product after bubbling absorption is nano-scale light calcium carbonate. To sum up, the hybrid system combining non-contact membrane and bubbling absorption is expected to be used to capture carbon dioxide from the flue gas of the cement plant.

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Keywords

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