4.7 Article

Enhancing CO2 conversion with plasma reactors in series and O2 removal

期刊

JOURNAL OF CO2 UTILIZATION
卷 66, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.jcou.2022.102252

关键词

Plasma; Atmospheric pressure glow discharge; Oxygen removal; Reactors in series; Recycle flow; CO2 conversion

资金

  1. Fund for Scientific Research (FWO) Flanders [110221 N]
  2. Flemish Agency for Innovation and Entrepreneurship (VLAIO) [HBC.2021.0251]
  3. European Research Council (ERC) under the European Union [810182]

向作者/读者索取更多资源

Studying plasma reactors in series as a recycle flow can enhance CO2 conversion, while the addition of O2 has a detrimental effect on the conversion. Opportunities for further improvements lie in specialized separation techniques.
In this work, we take a crucial step towards the industrial readiness of plasma-based CO2 conversion. We present a stepwise method to study plasma reactors in series as a first approach to a recycle flow. By means of this procedure, the CO2 conversion is enhanced by a factor of 3, demonstrating that a single-pass plasma treatment performs far below the optimal capacity of the reactor. Furthermore, we explore the effect of O2 in the mixture with our flexible procedure. Addition of O2 in the mixture has a clear detrimental effect on the conversion, in agreement with other experiments in atmospheric pressure plasmas. O2 removal is however highly beneficial, demonstrating a conversion per pass that is 1.6 times higher than the standard procedure. Indeed, extracting one of the products prevents recombination reactions. Based on these insights, we discuss opportunities for further improvements, especially in the field of specialised separation techniques.

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