一个碳中性CO2捕获,转化和利用循环与低温再生氧化物
Sayan Kar1, Alain Goeppert1, Vicente Galvan1
1Loker Hydrocarbon Research Institute and Department of Chemistry , University of Southern California , University Park , Los Angeles , California 90089-1661 , United States.
Journal of the American Chemical Society
|October 20, 2018
概括
本研究介绍了一种可回收的系统,用于捕获二氧化碳 (CO2) 并使用氧化溶液和催化剂将其转化为甲酸盐. 该过程是碳中和的,通过直接形成燃料电池产生电力,并使催化剂和溶剂回收成为可能.
科学领域:
- 绿色化学和催化
- 碳捕获和利用
- 电化学能量转换
背景情况:
- 大气中二氧化碳 (CO2) 度的增加需要有效的捕获和转化技术.
- 直接酸盐燃料电池提供了一个从酸盐中产生能源的有希望的途径.
- 可回收的催化系统对于可持续的化学过程至关重要.
研究的目的:
- 开发一种高效且可回收的二氧化碳捕获和转化成盐的系统.
- 将酸盐生产与直接酸盐燃料电池技术相结合,实现碳中和循环.
- 在这个综合系统中研究各种无机氧化物和同质触媒的性能.
主要方法:
- 使用水性无机氧化物 (NaOH,KOH) 来捕获二氧化碳.
- 采用同质式催化剂 (以Ru和Fe为基础的PNP复合物) 用于将二氧化碳化为格式.
- 实施双相溶剂系统 (2-MTHF/H2O) 用于催化剂和溶剂回收.
- 在用于发电和氧化物再生的直接燃料电池中直接使用产生的盐溶液.
主要成果:
- 实现了高效的可回收碳捕获和转化为盐的系统.
- 通过使用燃料电池中的酸盐来再生氧化物,证明了碳中和循环.
- 在使用催化剂和溶剂循环后的五个周期中,循环频率 (TOF) 没有显著下降.
- 确定了NaOH和KOH作为最佳氧化物,以及以Ru和Fe为基础的PNP复合物作为高活性催化剂.
结论:
- 开发的系统提供了一种有效和可持续的二氧化碳利用方法.
- 在单一循环中将二氧化碳捕获,转化和发电整合是可行的,并且碳中和.
- 该系统的可回收性和使用易于获得的NaOH和KOH等材料使其适用于大规模应用,包括从环境空气中捕获二氧化碳.
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