一个新型的电解气体升降反应堆,用于有效的微生物从二氧化碳中酸盐的电合成
Zeyan Pan1, Yuanyuan Hui2, Xiaona Hu3
1School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an 710049, China.
Bioresource technology
|December 1, 2023
概括
在泡列反应器中添加一个导流管显著增加了微生物的二氧化碳固定电合成. 这一创新提高了电流密度和酸盐生产,为工业应用铺平了道路.
科学领域:
- 生物技术是生物技术.
- 化学工程是化学工程的重要组成部分.
- 环境科学 环境科学
背景情况:
- 低电流密度限制了微生物的二氧化碳 (CO2) 固定电合成 (MES).
- 改进反应堆设计对于增加H2介导MES中的电流密度至关重要.
- 气泡柱反应堆对扩大规模有希望,但需要改进混合和气体质量转移.
研究的目的:
- 为了提高混合和气体质量转移在电解气泡柱MES反应堆.
- 为了研究内导管对反应堆性能的影响.
- 增加电流密度和酸盐生产,用于实际的MES应用.
主要方法:
- 在电解泡列MES反应器中引入内导管.
- 对H2的体积质量转移系数 (kLa) 的测量.
- 量化最大电流密度和平均酸盐生产速度.
- 使用计算流体动力学 (CFD) 来模拟流动模式和气体/液体分布.
主要成果:
- 在H2的体积质量转移系数 (kLa) 中实现了76.6%的增加.
- 最大电流密度增加了40%至337 A/m2.
- 平均酸盐生产率上升了72%,达到3.1g/L/d.
- CFD模拟显示了混合效率的提高和更均的气体/液体分布与导航管.
结论:
- 添加一个导流管有效地改善了泡柱MES反应堆中的混合和气体质量转移.
- 经过修改的反应堆设计显著提高了关键性能指标,包括电流密度和产品产量.
- 带有导管的电气泡柱反应堆显示了工业规模实施二氧化碳固定的巨大潜力.
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