Surrogate modelling-assisted comparison of reactor schemes for carbon dioxide removal by enhanced weathering of minerals using seawater
Surrogate modelling-assisted comparison of reactor schemes for carbon dioxide removal by enhanced weathering of minerals using seawater
复制标题
利用海水强化矿物风化去除二氧化碳的反应器方案的替代模型辅助比较
DOI：
10.1016/j.cej.2023.141804
复制
发表时间：
2023
影响因子：
15.1
通讯作者：
Zhang J
中科院分区：
文献类型：
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作者：
Zhang J
以反应堆为基础的增强矿物风化是从大气中去除二氧化碳以控制温室气体浓度以稳定气候的一种选择。早期的研究模拟了两种反应器类型，即滴床反应器和填充气泡塔。然而，它们的co2去除率尚未进行比较。在前人研究的基础上，本工作进一步发展了机械反应器模型，使其能够一致地描述矿物在海水中的连续风化。针对机械模型的计算需求，开发了基于代理模型的优化程序，以允许每种反应堆类型严格优化，以最小化两个相互竞争的目标，即能源消耗和空间要求。这使得两种反应堆类型的帕累托前沿得以生产和比较。当应用于主要由气液传质控制的方解石风化时，由于其优越的传质性能，填充气泡塔的性能一直优于滴床反应器。然而，当考虑到橄榄石的风化作用时，填充气泡柱的性能比方解石的风化作用明显恶化，主要是因为其低溶解速率使过程的控制机制从气/液传质转变为固体溶解。这些结果为未来基于反应堆的增强风化方案的评估提供了新的见解，包括反应堆设计选择和矿物类型的含义。
Reactor-based enhanced weathering of minerals represents one of the options for CO2removal from the atmosphere to control the concentration of greenhouse gases for stabilising the climate. Earlier studies have modelled two reactor types, namely trickle-bed reactor and packed bubble column. However, their CO2removal potential has not been compared. Building on the previous studies, this work further develops the mechanistic reactor models to enable them to consistently describe continuous weathering of minerals using seawater. Addressing the computational demands of the mechanistic models, a surrogate modelling-based optimisation procedure is developed to allow each reactor type to be rigorously optimised for minimising two competing objectives, namely energy consumption and space requirement. This has allowed the Pareto fronts of the two reactor types to be produced and compared. When applied to calcite weathering which is predominantly controlled by gas–liquid mass transfer, the packed-bubble column has been shown to consistently outperform the trickle-bed reactor, thanks to its superior mass transfer performance. However, when considering the weathering of forsterite, packed-bubble column performance is significantly worsened compared to calcite weathering, primarily because its low dissolution rate shifts the controlling mechanism of the process from gas/liquid mass transfer to solid dissolution. These results provide new insights to inform the future evaluation of reactor-based enhanced weathering schemes in terms of reactor design selection and the implication of mineral types.
影响因子：
15.1
作者：
Lei Xing;H. Pullin;L. Bullock;P. Renforth;R. Darton;A. Yang
通讯作者：
Lei Xing;H. Pullin;L. Bullock;P. Renforth;R. Darton;A. Yang
去除空气中的二氧化碳以稳定气候
DOI：
--
发表时间：
2020
期刊：
影响因子：
--
作者：
R. Darton;A. Yang
通讯作者：
A. Yang