This work reports an investigation of using a fixed bed of activated carbons (ACs) to capture CO₂ at hydrate formation conditions. The experiments were conducted at 277.15 K and 3.5 MPa. The water saturation (WS) of the fixed bed of ACs varies from 0% to 100%. The results indicate that an adsorption-hydration hybrid process occurred in the fixed bed of wet ACs while a single adsorption process occurred in the fixed bed of dry ACs. The adsorption-hydration hybrid process performs better than the single adsorption process for CO₂ capture. Gas consumption at 100% WS is 3.18 times greater than that obtained using dry ACs (single adsorption process). It is found that 40% WS is an optimal value, and the gas consumption obtained at this WS is larger than that obtained at 0%, 70%, and 100% WS. This gas consumption is also greater than that obtained using stirred reactors at the same temperature and pressure conditions, so the adsorption-hydration hybrid process achieved in the fixed bed of wet ACs has a greater potential to capture CO₂ in comparison with the single adsorption or hydrate formation process.

中文翻译：

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在活性炭固定床中捕获 CO2 的吸附-水合混合工艺

这项工作报告了一项使用活性炭 (AC) 固定床在水合物形成条件下捕获 CO _{2的调查。}实验在 277.15 K 和 3.5 MPa 下进行。活性炭固定床的水饱和度 (WS) 从 0% 到 100% 不等。结果表明，在湿活性炭固定床中发生吸附-水合混合过程，而在干活性炭固定床中发生单一吸附过程。_{吸附-水合混合过程对 CO 2}的性能优于单一吸附过程捕获。100% WS 的气体消耗量是使用干式 AC（单一吸附过程）获得的气体消耗量的 3.18 倍。结果发现，40% WS 是最佳值，在此 WS 下获得的耗气量大于 0%、70% 和 100% WS 下获得的耗气量。这种气体消耗也大于在相同温度和压力条件下使用搅拌反应器获得的气体消耗，因此与单一吸附或相比，在湿式 ACs 固定床中实现的吸附-水化混合过程具有更大的捕获 CO ₂的潜力水合物形成过程。