Experimental investigation of La0.6Sr0.4FeO3-δ pellets as oxygen carriers in a counter-current packed-bed reactor for efficient chemical looping CO2 splitting

IF 7.2 2区工程技术 Q1 CHEMISTRY, MULTIDISCIPLINARY

Journal of CO2 Utilization Pub Date : 2024-09-21 DOI:10.1016/j.jcou.2024.102935

Yongliang Yan , Reinaldo Juan Lee Pereira , Matteo Fella , Zuoan Li , Wenting Hu , Yngve Larring , Ian S. Metcalfe

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引用次数: 0

Abstract

The application of chemical looping for reverse water gas-shift provides an efficient way for the conversion of CO₂ to CO, enabling the transformation of captured CO₂ into value-added products. For example, by using the produced CO along with renewable H₂ to synthesise liquid fuels. In this study, we applied the concept of a chemical ‘memory’ reactor, employing a perovskite-based oxygen carrier (La_0.6Sr_0.4FeO_3-δ, LSF) in a counter-current packed-bed reactor for CO₂ splitting. This approach overcomes the chemical equilibrium limitation and could produce high purity CO.

Our work experimentally investigated the performance of LSF pellets as oxygen carriers in a large lab-scale packed-bed reactor with gas switching technology for chemical looping CO₂ splitting. We evaluated the effects of changes in feed time, bed temperatures, and flow rates on CO₂ to CO conversion. Optimal conditions gave over 90 % CO₂ to CO conversion via counter-current flow, compared to 45 % for conventional co-current flow in the same reactor. Higher bed temperatures enhanced the CO₂ to CO conversion.

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在逆流填料床反应器中将 La0.6Sr0.4FeO3-δ 粒子作为氧气载体用于高效化学循环二氧化碳裂解的实验研究

反向水气变换化学循环的应用为将二氧化碳转化为一氧化碳提供了一种有效的方法，使捕获的二氧化碳能够转化为高附加值产品。例如，利用产生的 CO 和可再生 H2 合成液体燃料。在这项研究中，我们应用了化学 "记忆 "反应器的概念，在逆流填料床反应器中采用了一种基于过氧化物的氧载体（La0.6Sr0.4FeO3-δ，LSF）来进行二氧化碳分离。我们的工作通过实验研究了 LSF 粒子作为氧气载体在实验室规模的大型填料床反应器中的性能，该反应器采用气体切换技术进行二氧化碳化学循环拆分。我们评估了进料时间、床层温度和流速的变化对二氧化碳到一氧化碳转化率的影响。在最佳条件下，通过逆流，二氧化碳到一氧化碳的转化率超过 90%，而在同一反应器中，传统的同流式转化率仅为 45%。较高的床层温度提高了二氧化碳到一氧化碳的转化率。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of CO2 Utilization CHEMISTRY, MULTIDISCIPLINARY-ENGINEERING, CHEMICAL

CiteScore

13.90

自引率

10.40%

发文量

406

审稿时长

2.8 months

期刊介绍： The Journal of CO2 Utilization offers a single, multi-disciplinary, scholarly platform for the exchange of novel research in the field of CO2 re-use for scientists and engineers in chemicals, fuels and materials. The emphasis is on the dissemination of leading-edge research from basic science to the development of new processes, technologies and applications. The Journal of CO2 Utilization publishes original peer-reviewed research papers, reviews, and short communications, including experimental and theoretical work, and analytical models and simulations.