Abstract Three solid chemicals, CaCO3, MgCO3, and BaCO3, were tested to accelerate the CO2 absorption with monoethanolamine (MEA) solvents to verify the effect of heterogeneous catalysis. The experiments were conducted in a batch process at 20 ± 0.2 °C and a semi-batch process under room temperature. For the batch process tests, CaCO3, MgCO3, and BaCO3, accelerated the CO2 absorption with MEA solutions at 1, 3, and 5 mol/L, respectively. The overall absorption periods were reduced by around 39.5%, 36.8%, and 36.8% in 3 M solution; and 31.9%, 19.1%, and 26.6% in 5 M solution. For the semi-batch process tests, CaCO3 and MgCO3 accelerated the CO2 absorption with 5 M MEA solutions by 20% and 20%, from 57 s to 45 s to reach equilibrium at loading of 0.0 mol/mol, and 16% and 12% from 75 s to 63–66 s to reach equilibrium at loading of 0.20 mol/mol. These solid chemicals were good candidates of heterogeneous catalysts of CO2–MEA absorption in an amine scrubbing process.

中文翻译：

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在间歇和半间歇过程中借助 CaCO3、MgCO3 和 BaCO3 催化 CO2-MEA 吸收

摘要 使用单乙醇胺 (MEA) 溶剂测试了三种固体化学品 CaCO3、MgCO3 和 BaCO3 以加速 CO2 吸收，以验证多相催化的效果。实验在 20 ± 0.2 °C 的间歇过程和室温下的半间歇过程中进行。对于批处理测试，CaCO3、MgCO3 和 BaCO3 分别在 1、3 和 5 mol/L 的 MEA 溶液中加速了 CO2 吸收。在 3 M 溶液中，整体吸收周期分别减少了约 39.5%、36.8% 和 36.8%；5 M 溶液中分别为 31.9%、19.1% 和 26.6%。对于半间歇工艺测试，CaCO3 和 MgCO3 将 5 M MEA 溶液的 CO2 吸收加速了 20% 和 20%，从 57 s 到 45 s，以在 0.0 mol/mol 和 16% 和 12% 的负载量下达到平衡从 75 s 到 63-66 s 以在 0.20 mol/mol 的负载量下达到平衡。