Application of Carbonic Anhydrase Membrane in Direct Air Carbon Capture by Microalgae and Enhancement of Carbon Sequestration Performance

WANG Ruilong; LI Mingjia; Sandra KENTISH

doi:10.7652/xjtuxb202409002

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Application of Carbonic Anhydrase Membrane in Direct Air Carbon Capture by Microalgae and Enhancement of Carbon Sequestration Performance

更新时间：2025-07-28

- Application of Carbonic Anhydrase Membrane in Direct Air Carbon Capture by Microalgae and Enhancement of Carbon Sequestration Performance
- Vol. 58, Issue 9, Pages: 11-18(2024)
- 作者机构：
  
  1. 西安交通大学能源与动力工程学院,西安,710049
  2. 西安交通大学热流科学与工程教育部重点实验室,西安,710049
  3. 北京理工大学机械与车辆工程学院,北京,100081
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202409002
  CLC： TK12
- Online First：10 September 2024，
  
  Published：2024
- 稿件说明：
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WANG Ruilong, LI Mingjia, Sandra KENTISH. Application of Carbonic Anhydrase Membrane in Direct Air Carbon Capture by Microalgae and Enhancement of Carbon Sequestration Performance[J]. 2024, 58(9): 11-18.
DOI：

WANG Ruilong, LI Mingjia, Sandra KENTISH. Application of Carbonic Anhydrase Membrane in Direct Air Carbon Capture by Microalgae and Enhancement of Carbon Sequestration Performance[J]. 2024, 58(9): 11-18. DOI： 10.7652/xjtuxb202409002.

摘要

为了解决低浓度直接空气碳捕集条件下微藻光生物反应器内CO

传质效率差、溶解度低的问题

采用实验的方法制备了碳酸酐酶(CA)附着的尼龙纤维膜

利用CA催化转化CO

为碳酸氢根的性质

提出了一种可以改善微藻溶液中CO

溶解度及转化率的新型光生物反应器

测试了该反应器放置CA附着尼龙纤维漂浮膜前后的微藻培养和固碳性能

并进一步探究了膜的开孔率及CA附着量对微藻固碳率的影响。实验结果表明:所制备的CA附着的尼龙纤维膜对CO

转化速率提升了62.7%

通过耐久性测试

CA的活性在5个培养周期后仍保持良好

性能衰减仅为11.3%; 与传统气石鼓气方式相比

提出的新型光生物反应器的微藻质量浓度提高了29.7%

固碳率提升了65%; 随着膜开孔率的增加和透光率的增加

单位CA负载质量的固碳率提高

开孔面积占比24.75%的对照组的单位CA固碳率相比不开孔提高了13%。该研究为进一步提高微藻直接空气捕集的固碳率提供了一种新的方法。

Abstract

To address the challenges of low CO

mass transfer efficiency and solubility in microalgae photobioreactors in direct air carbon capture

this paper employs experimental methods to prepare a nylon fiber membrane coated with carbonic anhydrase(CA). By utilizing CA's catalytic properties to convert CO

into bicarbonate

a novel photobioreactor is proposed to enhance CO

solubility and conversion rate in microalgae solutions. The reactor's performance

with and witho

ut the CA-coated nylon floating membrane

is evaluated for microalgae cultivation and carbon sequestration. Furthermore

the impact of membrane porosity and CA loading on carbon fixation efficiency is investigated. The experimental results demonstrate that the prepared CA-coated nylon fiber membrane increases the CO

conversion rate by 62.7%. Through durability testing

the CA activity remains robust even after five cultivation cycles

with only an 11.3% decline in performance. Compared to traditional aeration methods

the novel photobioreactor increased microalgae biomass production by 29.7% and carbon sequestration efficiency by 65%. Moreover

an increase in membrane porosity and light transmittance enhances the carbon sequestration efficiency per unit of CA loading

showing a 13% improvement in the carbon fixation rate per unit of CA for the control group with a 24.75% open area ratio compared to the non-porous control. This study provides a novel approach for further enhancing the carbon sequestration efficiency of microalgae in direct air capture.

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references

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