Abstract A novel system for contacting gases and liquids, suitable for many applications involving gas–liquid contact such as CO2 capture and brine desalination, has been simulated and experimentally validated. The system comprises a vertical vessel with gas and liquid ports and inert particles that enhance mixing and provide a high gas–liquid interfacial area. A low gas flow rate was statistically demonstrated and experimentally verified to be the optimum condition for CO2 capture and brine desalination; however, the gas velocity can have a considerable effect on the motion of inert particles inside the reactor. Uniform particles motion ensures good mixing within the reactor and hence efficient absorption and stripping process. A computational fluid dynamics (CFD) model, namely Eulerian model, presented in this paper, will help demonstrate the effect of mixing particles at specific conditions on the gas and liquid velocities inside the reactor, gas and liquid volume distribution through reactor, and eddy viscosities stresses of the mixing particles. A mesh-independent study was conducted to demonstrate the independency of mesh structure and size on the output responses. A quasi-steady state was attained to ensure the stability and feasibility of the selected model. The assembled model exhibits remarkable applicability in determining the optimum mixing particles densities, volume ratios, and sizes to ensure best velocity distribution and gas spreading inside the reactor and accordingly enhance the associated chemical reactions.

中文翻译：

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惰性粒子喷射床反应器 (IPSBR) 系统的计算流体动力学模拟

摘要 一种新的气体和液体接触系统已经过模拟和实验验证，该系统适用于涉及气液接触的许多应用，如 CO2 捕集和盐水淡化。该系统包括一个垂直容器，带有气体和液体端口以及惰性颗粒，可增强混合并提供高气液界面面积。经统计证明和实验证实，低气体流速是 CO2 捕集和盐水脱盐的最佳条件；然而，气体速度会对反应器内惰性颗粒的运动产生相当大的影响。均匀的颗粒运动确保了反应器内的良好混合，从而确保了高效的吸收和汽提过程。本文提出的计算流体动力学 (CFD) 模型，即欧拉模型，将有助于证明在特定条件下混合颗粒对反应器内气体和液体速度、通过反应器的气体和液体体积分布以及混合颗粒的涡流粘度应力的影响。进行了与网格无关的研究，以证明网格结构和尺寸对输出响应的独立性。获得准稳态以确保所选模型的稳定性和可行性。组装模型在确定最佳混合颗粒密度、体积比和尺寸方面具有显着的适用性，以确保反应器内的最佳速度分布和气体扩散，从而增强相关的化学反应。通过反应器的气体和液体体积分布，以及混合颗粒的涡流粘度应力。进行了与网格无关的研究，以证明网格结构和尺寸对输出响应的独立性。获得准稳态以确保所选模型的稳定性和可行性。组装模型在确定最佳混合颗粒密度、体积比和尺寸方面具有显着的适用性，以确保反应器内的最佳速度分布和气体扩散，从而增强相关的化学反应。通过反应器的气体和液体体积分布，以及混合颗粒的涡流粘度应力。进行了与网格无关的研究，以证明网格结构和尺寸对输出响应的独立性。获得准稳态以确保所选模型的稳定性和可行性。组装模型在确定最佳混合颗粒密度、体积比和尺寸方面具有显着的适用性，以确保反应器内的最佳速度分布和气体扩散，从而增强相关的化学反应。获得准稳态以确保所选模型的稳定性和可行性。组装模型在确定最佳混合颗粒密度、体积比和尺寸方面具有显着的适用性，以确保反应器内的最佳速度分布和气体扩散，从而增强相关的化学反应。获得准稳态以确保所选模型的稳定性和可行性。组装模型在确定最佳混合颗粒密度、体积比和尺寸方面具有显着的适用性，以确保反应器内的最佳速度分布和气体扩散，从而增强相关的化学反应。