在工业电流密度下,在缩的海水中进行电催化乙烯化
Linsen Huang1, Deyu Bao1, Yunling Jiang1
1School of Chemical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia.
Angewandte Chemie (International ed. in English)
|May 21, 2024
概括
使用缩的海水实现了高效率的电催化乙烯化以乙烯 (E-AHE). 这一综合系统可回收性海水电解 (ASE) 的盐水废物,用于可持续的乙烯和生产.
科学领域:
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
- 可持续化学 可持续化学
背景情况:
- 电催化乙烯化以乙烯 (E-AHE) 为传统方法提供了一个可持续的替代方案,但面临着低电流密度和效率的挑战.
- 开发高效和选择性的电催化剂对于推进E-AHE技术至关重要.
研究的目的:
- 为了提高E-AHE的效率和电流密度,使用缩的海水作为电解质.
- 研究缩海水在促进E-AHE的机制作用.
- 通过性海水电解 (ASE) 产生的盐水废物,展示一套用于同时生产和乙烯的综合系统.
主要方法:
- 从ASE盐水废物中利用缩的海水 (0.96M NaCl) 作为E-AHE的电解质.
- 进行了机理学研究,以了解海水酸盐在质子供应中的作用.
- 集成的ASE和E-AHE工艺,直接将ASE盐输出输入到E-AHE系统.
- 对一系列工业电流密度的乙烯生产进行了评估的法拉第克效率 (FE) 和选择性.
主要成果:
- 通过使用缩海水,在 1.0 A cm-2 的高部分电流密度下,实现了 E-AHE 的 71.2% FE.
- 与淡水电解质相比,E-AHE FE的增加是两倍,这是由于离子促进的水解离.
- 集成的ASE-E-AHE系统实现了超过97.0%的FE和97.5%的乙烯生产选择性,电流密度高达0.6 A cm-2.2.
- 成功回收了ASE盐水废物,以实现集成系统的连续循环运行.
结论:
- 缩的海水通过促进质子的可用性,有效地提高了E-AHE的性能.
- 集成的ASE-E-AHE系统为生产和乙烯提供了可持续和高效的途径,同时利用盐水废物.
- 这项工作代表了电催化乙烯生产和海水电解盐水提炼的重大进步.
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