介质阻挡放电微等离子体分解二氧化碳研究

Decomposition of carbon dioxide via dielectric barrier discharge microplasma

二氧化碳既是主要的温室气体之一,也是包含碳和氧的资源,把相对惰性的CO_(2)转化为易于利用的CO是其利用的方法之一。采用介质阻挡微等离子体反应器通过单变量和正交实验探究了反应器参数(放电区长度、放电间距、介质厚度)和工艺参数(输入功率、放电频率和停留时间)对CO_(2)分解为CO的转化率和能量效率的影响规律。研究结果表明,影响CO_(2)转化率的大小顺序依次为:放电间距>放电长度>输入功率≈停留时间>介质厚度>放电频率;输入功率60.0 W、放电频率9.0 kHz和停留时间1.5 s、放电区长度60 mm、放电间距0.5 m、介质厚度1.6 mm时,CO_(2)的转化率为10.6%,能量效率为4.1%。

Carbon dioxide is not only one of the main greenhouse gases,but also a resource containing carbon and oxygen.Converting relatively inert CO_(2) into easy-to-use CO is one of its utilization methods.The effects of reactor parameters(discharge zone length,discharge spacing,and dielectric thickness)and process parameters(input power,discharge frequency and residence time)on the conversion and energy efficiency of CO_(2) decomposition into CO were investigated with a dielectric barrier microplasma reactor.The results indicated that the order of affecting CO_(2) conversion is:discharge spacing>discharge length>input power≈residence time>dielectric thickness>discharge frequency.When the input power was 60.0 W,the discharge frequency was 9.0 kHz and the residence time was 1.5 s,the discharge area length was 60 mm,the discharge spacing was 0.5 m and the dielectric thickness was 1.6 mm,the CO_(2) conversion was 10.6%and the energy efficiency was 4.1%.