Critical atmospheric pollutants of various types continue to challenge researchers to develop their mitigation methodologies. In this study, we report our recent results on a simple and convenient approach for chemical conversion of gaseous benzene (Bz) and carbon dioxide (CO2 mixtures with and without argon diluent to salicylic acid (SA) employing dielectric barrier discharge (DBD) cold plasma technique. Online reactants’/products’ concentrations are analyzed and estimated with gas chromatograph–flame ionization detector–thermal conductivity detector (GC-FID-TCD) system, whereas the products SA along with phenol (PH) and benzoic acid (BA) are analyzed offline with gas chromatograph-mass spectrometer (GC-MS) from low-volatile deposits on electrode surfaces during DBD. Efficient removal of pollutants, thus, suggests a new utilitarian and combo approach toward pollutant alleviation, wherein dissimilar pollutant chemicals (CO2 and Bz) are simultaneously transformed to usable products such as SA. Products’ analyses reveal that the presence of PH (10 ppm) and BA (< 1 ppm) perhaps assist to elucidate the formation mechanism of SA (5 ppm) in CO2-Bz DBD systems. Interestingly, the Bz transformation to SA is 10 times more in 90% Ar and 10% CO2-mixed carrier systems containing Bz.

中文翻译：

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使用介质阻挡放电技术在二氧化碳存在下将气态苯转化为水杨酸

各种类型的关键大气污染物继续挑战研究人员开发他们的缓解方法。在这项研究中，我们报告了我们最近的结果，该方法使用介电势垒放电 (DBD) 冷等离子体将气态苯 (Bz) 和二氧化碳（含和不含氩稀释剂的 CO2 混合物）化学转化为水杨酸 (SA)技术。使用气相色谱-火焰离子化检测器-热导检测器 (GC-FID-TCD) 系统分析和估计在线反应物/产物的浓度，而产物 SA 连同苯酚 (PH) 和苯甲酸 (BA) 是使用气相色谱-质谱仪 (GC-MS) 对 DBD 期间电极表面的低挥发性沉积物进行离线分析。因此，有效去除污染物，提出了一种新的实用和组合方法来减轻污染物，其中不同的污染物化学物质（CO2 和 Bz）同时转化为可用的产品，如 SA。产品分析表明，PH (10 ppm) 和 BA (< 1 ppm) 的存在可能有助于阐明 CO2-Bz DBD 系统中 SA (5 ppm) 的形成机制。有趣的是，在含有 Bz 的 90% Ar 和 10% CO2 混合载体系统中，Bz 向 SA 的转化是 10 倍。