通过Ag/Al2O3和Ag/CeO2催化脱氧化柴油-烟氧化的动力分析,使用异转换和主图技术
Boonlue Sawatmongkhon1,2, Punya Promhuad1, Thanawat Thaisruang1
1College of Industrial Technology, King Mongkut's University of Technology North Bangkok, 1518 Pracharat 1 Road, Wongsawang, Bangsue, Bangkok 10800, Thailand.
ACS omega
|August 21, 2023
概括
这项研究分析了使用Ag/Al2O3和Ag/CeO2催化剂的柴油煤烟燃烧动力学. 催化剂显著降低了激活能量,而Ag/Al2O3显示出有效的烟尘氧化最显著的下降.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 燃烧科学 燃烧科学
- 材料科学 材料科学 材料科学
背景情况:
- 柴油煤烟排放造成环境和健康问题.
- 催化氧化是一种有前途的去除烟尘的方法.
- 了解燃烧动力学对于开发有效的催化剂至关重要.
研究的目的:
- 为了动态分析脱氧化柴油烟的燃烧.
- 评估Ag/Al2O3和Ag/CeO2对烟灰氧化的催化作用.
- 确定催化和未催化烟灰燃烧的激活能量和反应模型.
主要方法:
- 使用异构转换技术来估计激活能量.
- 使用总体图片来确定反应机制.
- 确定了非催化和催化烟尘氧化过程的动力参数.
主要成果:
- 明显的激活能量从101.85 kJ/mol (未催化) 降至61.85 kJ/mol (Ag/Al2O3) 和82.78 kJ/mol (Ag/CeO2) 的水平.
- 反应顺序模型f(α) = (1-α) n最适合数据,n=1.4用于未催化,n=1用于Ag/Al2O3和Ag/CeO2催化烟.
- Ag/Al2O3显示出更快的初始氧化率,这表明活性物种的快速氧化,然后是第一阶段机制.
结论:
- 基于银的催化剂 (Ag/Al2O3和Ag/CeO2) 显著提高柴油烟尘燃烧动力学.
- Ag/Al2O3 具有较高的催化活性,可降低激活能量并加速初始氧化.
- 识别的反应模型为优化催化转换器的燃烧途径提供了洞察力.
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