在现场的光谱电化学研究,通过CO2降低乙酸的形成,在氨基基基捕获溶液中使用生物催化剂
Barbara Bohlen1, Nick Daems1, Zhangfei Su2
1Research Group Applied Electrochemistry and Catalysis (ELCAT), University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium.
ChemSusChem
|May 7, 2024
概括
本研究探讨了基于氨基的捕获溶液中的电化学二氧化碳减排 (eCO2R). 石催化剂促进溶解的二氧化碳的eCO2R,以高效率产生有价值的酸盐.
科学领域:
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 工业碳捕获和利用 (CCU) 面临着能源惩罚,需要采用替代方法.
- 电化学二氧化碳减排 (eCO2R) 是将二氧化碳转化为增值产品的一个有希望的途径.
- 了解氨基基基捕获溶液中的反应环境对于优化CCU过程至关重要.
研究的目的:
- 使用光谱电化学研究基于单乙醇胺 (MEA) 的捕获溶液中的电化学二氧化碳减排 (eCO2R).
- 在一个新的CCU过程中识别eCO2R的活性物种和反应途径.
- 为了评估从二氧化碳中生产有价值的化学物质,如酸盐,使用斯木催化剂.
主要方法:
- 在现场福里埃变换红外光谱 (FTIR) 分析eCO2R中的活性物种.
- 使用 (Bi) 和商用Bi2O3纳米粒子 (NP) 作为催化剂的电化学实验.
- 在流量条件下对产品进行分析,以量化酸盐和酸盐的产量.
主要成果:
- 谱电化学证实,溶解的CO2,而不是碳酸盐,是Bi催化剂中eCO2R的活性物种.
- 甲酸盐和酸盐被检测为eCO2R的产物.
- 达到了高达14.5%的酸盐的正常化法拉戴效率 (FE),特别是使用化 (CTAB) 或在高电流密度下.
结论:
- 该研究阐明了基于MEA的捕获溶液中eCO2R的机制,强调了溶解CO2的作用2.
- 这些发现表明,在联合CCU工艺中使用木催化剂从二氧化碳中产生像酸盐这样的有价值化学物质的潜力.
- 这项研究有助于更好地了解捕获电解质中的二氧化碳转化,为更高效的CCU技术铺平了道路.
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