In this work, CO₂ reaction with biochar via the Boudouard reaction (CO₂ + C → 2CO) has been investigated in an atmospheric non-thermal plasmatron for the first time, aiming for enhanced conversion of CO₂ into O₂-free fuel gas (mainly CO). The motion behavior and electrical characteristics of the plasmatron in CO₂ was studied to understand its physical characteristics. Both the CO₂ decomposition reaction and CO₂ reaction with biochar were evaluated in the plasmatron under different flow rates and applied voltages. The results showed that the discharge experiences a consecutive circle of breakdown – elongation – extinguishment - re-breakdown outside of the electrode region. For the CO₂ decomposition process without biochar, a high voltage of 10 kV shifts the optimal flow rate to a remarkably higher value, yielding a CO₂ conversion of 6.9 % and an energy efficiency of up to 36.4 % at flow rate = 13 L/min. In the presence of coconut shell biochar, the net Boudouard reaction becomes the dominant contributor to CO₂ conversion with contributions of up to >96.0 % (applied voltage =10 kV). As a result, a significantly enhanced CO₂ conversion of up to 21.3 % can be achieved in comparison to the CO₂ decomposition process, simultaneously with a dramatically higher CO (e.g., increases from 2.31% to 34.08%) but remarkably lower O₂ concentration (e.g., decreases from 1.0 % to 0.06 %) in the products. The immediate study reveals that the plasmatron assisted CO₂ reaction with biochar via the Boudouard reaction is a promising route for energy efficient CO₂ conversion into O₂-free fuel gas.

在这项工作中，首次在大气非热等离子体加速器中研究了通过Boudouard反应（CO ₂ + C→2CO）与生物炭进行的CO ₂反应，目的是增强CO ₂转化为不含O _2的燃料气体（主要是一氧化碳）。研究了等离子加速器在CO ₂中的运动行为和电学特性，以了解其物理特性。CO ₂分解反应和CO ₂两者在等离子加速器中，在不同的流速和施加的电压下，与生物炭的反应进行了评估。结果表明，放电在电极区域外经历了连续的击穿-伸长-熄灭-再击穿循环。对于没有生物炭的CO ₂分解过程，10 kV的高电压会将最佳流量转换为明显更高的值，在流量= 13 L /时产生的CO ₂转化率为6.9％，能源效率高达36.4％分钟 在存在椰子壳生物炭的情况下，净Boudouard反应成为CO ₂转化的主要贡献者，贡献率高达> 96.0％（施加电压= 10 kV）。结果，CO ₂显着增强与CO ₂分解过程相比，可实现高达21.3％的转化率，同时具有显着更高的CO（例如，从2.31％增加到34.08％），但O ₂浓度显着降低（例如，从1.0％减少到0.06） ％）在产品中。即时研究表明，等离子加速器通过Boudouard反应与生物炭进行的CO ₂反应是将CO ₂高效转化为不含O _2的可燃气体的有希望的途径。