基于响应面分析方法的等离子体转化二氧化碳优化研究  

Optimization of plasma carbon dioxide conversion based on response surface methodology

作　　者：岳晓峰 罗洋 张红莉 许文文 刘晓平 YUE Xiaofeng;LUO Yang;ZHANG Hongli;XU Wenwen;LIU Xiaoping(School of Civil Engineering,Hefei University of Technology,Hefei 230009,China;Institute of Building Carbon Neutral,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009 [2]合肥工业大学建筑碳中和研究所,合肥230009

出　　处：《环境工程学报》2025年第2期479-490,共12页Chinese Journal of Environmental Engineering

基　　金：国家重点研发计划项目(2018YFC0810600);中科大先研院-中科大禹等离子体应用技术联合实验室运行经费项目(JL06120001H)。

摘　　要：等离子体方法用于CO_(2)转化受到广泛关注,但现有研究存在能效偏低的问题。针对该问题,需要寻找兼顾CO_(2)转化率及能量效率的优化方法。搭建了介质阻挡放电(DBD)等离子体法转化CO_(2)的实验平台并开展系列实验,研究输入功率、进气流量和放电长度对于放电和反应器温升的影响,应用响应面分析方法,针对上述参数对于CO_(2)转化率、能量效率及外电极温升的单一影响及交互作用进行研究,构建了3个响应面模型并与实验数据进行对比,分析不同参数对于结果的影响强度及相互间关联特征。结果表明,输入功率对于反应器温升的影响呈正相关,平衡温度由20 W工况下的约65℃提升至80 W工况下的约146℃,温度上升约1倍;放电长度对于反应器温升的影响呈负相关,平衡温度由10 cm工况下的约133℃降至25 cm工况下的约72℃,降温幅值将近一半;进气流量对于放电的影响较为微弱。在较高流量(200~800 sccm)条件下,获得了最高6%的CO_(2)转化率以及406.9μmol CO_(2)·kJ^(-1)的能量效率。在本研究研究参数范围下的3个影响因素中,对于CO_(2)转化率的影响程度排序为:进气流量>输入功率>放电长度。对于能量效率的影响程度排序为:输入功率>进气流量>放电长度。对于外电极温升的影响程度排序为:输入功率>放电长度>进气流量。该实验分析结果可为后续DBD转化CO_(2)研究提供基础性数据及预测模型,也为提升能效、增强传热提供了优化思路。Plasma methods for carbon dioxide conversion have received much attention,but existing studies suffer from low energy efficiency.To address this problem,it is necessary to find an optimization method that takes into account both the CO_(2) conversion rate and energy efficiency.This study established an experimental platform utilizing dielectric barrier discharge(DBD)plasma for CO_(2) conversion and conducted a series of experiments.The study investigated the impact of input power,inlet gas flow rate,and discharge length on discharge characteristics and reactor temperature rise.Response surface analysis was applied to examine the individual and interactive effects of these parameters on CO_(2) conversion rates,energy efficiency,and external electrode temperature.The response surface equations based on the above parameters were constructed and compared with the experimental data,and the intensity of the effects of different parameters on the results and the correlation characteristics were analysed.The results showed that the effect of input power on reactor temperature rise was positively correlated,the temperature increased from approximately 65℃under 20 W operating conditions to approximately 146℃under 80 W operating conditions and the temperature increased of approximately 1 times.The effect of discharge length on reactor temperature rise was negatively correlated,the temperature dropped from about 133℃under the 10 cm working condition to about 72℃under the 25 cm working condition,and the cooling amplitude was nearly half.The effect of inlet gas flow on discharge was relatively weak.Under higher flow conditions(200 sccm-800 sccm),a maximum CO_(2) conversion rate of 6%and an energy efficiency of 406.9μmol CO_(2)·kJ^(-1) were obtained.Among the three influencing factors in the range of parameters studied in this paper,the degree of influence on carbon dioxide conversion was ranked as follows:inlet flow>input power>discharge length;the degree of influence on energy efficiency was ranked as follows:input

关 键 词：等离子体 CO_(2) 响应面 介质阻挡放电 放电特性 温升 

分 类 号：X506[环境科学与工程—环境工程]