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气体成分对温度和CO2转换在滑动弧等离子子反应堆的影响:从实验和计算中对等离子体后催化物的洞察力

Wencong Xu^1,2,3, Senne Van Alphen², Vladimir V Galvita³

¹Department of Chemistry, Research group LADCA, University of Antwerp, Universiteitsplein 1, B-2610 Wilrijk, Antwerp, Belgium.

|March 14, 2024

概括

将和甲添加到二氧化碳等离子体转化中,可显著增加用于后等离子体催化物的二氧化碳和产量. 添加水减少了转换,但降低了能源成本,优化了基于等离子体的二氧化碳利用.

科学领域:

等离子体科学与工程等离子体科学与工程
催化剂是一种催化剂.
化学工程是化学工程的重要组成部分.

背景情况:

基于等离子体的二氧化碳 (CO2) 转化正在引起人们对生产有价值的化学品的关注.
了解等离子体操作对后等离子体过程的影响对于高效的催化应用至关重要.

研究的目的:

研究将N2,N2/CH4和N2/CH4/H2O添加到二氧化碳滑动弧形质子 (GAP) 的影响.
分析后等离子体催化剂 (PPC) 对排气流成分和温度的影响.

主要方法:

使用了一种CO2滑动弧形等离子仪 (GAP),使用不同的气体混合物 (N2,N2/CH4,N2/CH4/H2O).
测量了二氧化碳的转化,产品产量 (CO,H2) 和排气流温度.
在温度分布模拟中使用计算流体动力学 (CFD).

主要成果:

添加N2使CO2的转化率从4%增加到13%.
添加CH4进一步提高了CO2转化率至44% (在6L/分钟时高达61%),增加了CO和H2的产量.
添加H2O可以将二氧化碳的转化率从55%降低到22%,但能耗也可以从5.8降低到3kJ/L.
2增加了血后的温度;CO2/CH4比率的影响最小.
实验和CFD温度档案显示,随着距离排气管的距离,排气管的距离趋向下降.

结论:

气体混合物的组成显著影响了GAP反应堆中的CO2转换效率和产品选择性.
优化气体流速和组合是最大限度地提高PPC有价值的产品产量的关键.
温度概况为后等离子体催化床的最佳定位提供信息,以实现高效的热量和质量转移.

关键词:

二氧化碳转化转换方法计算建模计算建模滑动弧形质子仪的滑动血等离子体的使用方法温度配置文件温度配置文件

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