The Effect of Temperature and Gas/Liquid Ratio on CO₂ Removal Performance by Water-Based Nano-Bubble Process

Jirayu Kanlaya^1*, Navadol Laosiripojana¹, Nutthachai Pongprasert², Varit Srilaong²

1. ¹The Joint Graduate School of Energy and Environment, King Mongkut’s University of Technology Thonburi, Bangkok 10140
2. ²School of Bioresources and Technology (Bangkhuntien Campus), King Mongkut’s University of Technology Thonburi, 49 Thakham, Bangkhuntien, Bangkok 10150, Thailand

Published in The First NZAAR International Event Series on Natural and Built Environment, Cities, Sustainability and Advanced Engineering, Putrajaya, Malaysia, 26 June 2016, pages 102 to 103. New Zealand Academy of Applied Research. ISSN 2463-5979 (online), 2463-5960 (print).

Abstract

The Nano-bubble process is a novel effective technology for CO 2 removal. Its advantages are their high specific area and stagnation in the liquid phase, which increase the gas dissolution. This study proposes the application of system using swirling jet flow method for the CO 2 absorption from mixture gas consisting of 60%v/v CO 2 and 40%v/v N 2 at 1000 ml/min using water as an absorbent. The effects of water temperature and gas/liquid ratio were studied. The results indicate that CO 2 outlet concentrations were in the range of 3.1%-8.6% at gas/liquid ratio of 0.05-0.2 ZLWKDFRQVWDQWLQIORZUDWHRIJDV:KHQWHPSHUDWXUHZDVGHFUHDVHG IURPWRÛ& &2 2 outlet concentrations reduced from 3% to 2% at 20 l/min of water. The CO 2 removal performance could be significantly improved because the decreasing of the temperature increased the viscosity of liquid and residence time of CO 2 bubbles in the column.

Keywords: Nano-bubble; CO 2 Removal; Gas Dissolution; CO 2 Absorption; Bubble Column

Rights

Copyright © New Zealand Academy of Applied Research Ltd 2016. All rights reserved. Reproduced in the GDI Academy archive from the original proceedings without change to the authors’ text.