Rapid and intensified screening of a carbon capture adsorbent using a 3D-printed swirling fluidised bed
Rapid and intensified screening of a carbon capture adsorbent using a 3D-printed swirling fluidised bed
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DOI：
10.1016/j.cej.2022.138405
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发表时间：
2022-08
影响因子：
15.1
通讯作者：
R. Jamei;J. McDonough;D. Reay;V. Zivkovic
中科院分区：
文献类型：
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作者：
R. Jamei;J. McDonough;D. Reay;V. Zivkovic
碳捕集 (CC) 将在中短期内实现能源、工业和运输部门脱碳以实现 2050 年净零目标。吸附是一种很有前景的 CC 技术，它使用固体吸附剂而不是液体吸收剂来从烟道气流中去除二氧化碳。在这项研究中，我们开发了一个用于筛选 CO2 吸附剂的小型平台，该平台使用 3D 打印环形流化床 (TORBED) 反应器来强化气固混合。在此，我们测试了商用吸附剂（基于支化聚乙烯亚胺，BPEI）从由不同 N2/CO2 混合物组成的人工烟道气流中捕获 CO2 的性能。随后收集了各种 CO2 体积分数 (2–20 vol%)、BPEI 床负载 (1–2.5 g)、气体流速 (20–35 L/min) 和温度 (40–70 °C) 的突破曲线。在持续不超过 10 秒的实验中，TORBED 中观察到了 2.64 ± 0.06 mmol/g 的高吸附容量。数据收集的速度之快代表了高通量筛选的潜力。通过监测每个实验期间的床温，我们还推断出 mini-TORBED 中的高传热速率最大限度地减少了吸附热对动力学的影响。
Carbon capture (CC) will play a predominant role in decarbonising the energy, industry, and transportation sectors in the short to medium timeframes to meet the 2050 Net Zero target. Adsorption is a promising CC technology that uses solid-adsorbents rather than liquid-absorbents to strip CO2from flue gas streams. In this study we developed a small-scale platform for screening CO2adsorbents that uses a 3D-printed toroidal fluidised bed (TORBED) reactor to intensify gas–solid mixing. Here we tested the performance of a commercial sorbent (based on branched polyethyleneimine, BPEI) for capturing CO2from artificial flue gas streams comprised of different N2/CO2mixtures. Breakthrough curves were subsequently collected for a variety of CO2volume fractions (2–20 vol%), BPEI bed loads (1–2.5 g), gas flow rates (20–35 L/min), and temperatures (40–70 °C). A high sorbent capacity of 2.64 ± 0.06 mmol/g was observed in the TORBED in experiments lasting no more than 10 s. The rapid speed in which the data were collected represents the potential for high throughput screening. By monitoring the bed temperature during each experiment, we also inferred that the high heat transfer rates in the mini-TORBED minimises the heat of adsorption influence of the kinetics.