In order to realize the effective reduction and utilization of carbon dioxide (CO₂) in coal-fired flue gas, a process was developed under atmospheric pressure that uses KBH₄ as an efficient hydrogen donor. By investigating the influencing factors of CO₂ conversion, the optimal experimental conditions were determined and the average CO₂ conversion efficiency of 50.36% was obtained when the KBH₄ concentration was 0.2 mol/L, reaction temperature was 50 °C, solution pH was 8, and flow rate was 300 mL/min. The experimental results also verified that the coexisting gases such as sulfur dioxide (SO₂), nitric oxide (NO) and oxygen (O₂) in flue gas had no significant competition or inhibition effect on CO₂ conversion. Meanwhile, the conversion products were analyzed by an Ion Chromatography (IC) and Fourier Transform Infrared Spectroscopy (FT-IR), and the results proved that the main reaction product was formate. Combined with the relevant literatures, the mechanism of CO₂ reaction with KBH₄ was proposed.

为了有效地减少和利用燃煤烟道气中的二氧化碳（CO ₂），开发了一种在大气压下使用KBH ₄作为有效氢供体的方法。通过研究CO ₂转化的影响因素，确定了最佳实验条件，当KBH ₄浓度为0.2 mol / L，反应温度为50°C，溶液pH为8时，平均CO ₂转化效率为50.36％。，流速为300mL / min。实验结果还验证了二氧化硫（SO ₂），一氧化氮（NO）和氧气（O ₂烟气中的）对CO ₂转化没有明显的竞争或抑制作用。同时，通过离子色谱（IC）和傅里叶变换红外光谱（FT-IR）分析了转化产物，结果证明主要反应产物为甲酸盐。结合相关文献，提出了CO ₂与KBH ₄反应的机理。