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对二氧化气相扩散系数的模拟和实验研究

Xiaolong Wu¹, Renjie Zou¹, Guangqian Luo¹

¹State Key Laboratory of Coal Combustion (SKLCC), School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.

The Science of the total environment

|July 6, 2024

概括

精确的二氧化气相扩散系数被确定为燃煤发电厂的排放. 这些数据改善了脱硫系统中的去除模型,减少了污染物排放.

科学领域:

环境科学环境科学
化学工程是化学工程的重要组成部分.
物理化学物理化学

背景情况:

燃煤发电厂释放污染物,需要有效的清除策略.
湿烟气脱硫系统对于减轻排放至关重要.
了解污染物的行为,特别是二氧化 (SeO2) 的气相扩散,对于优化去除过程至关重要.

研究的目的:

为了确定SeO2在烟气中的气相扩散系数.
用实验测量来验证理论计算.
为了提高脱硫系统中去除模型的准确性.

主要方法:

用分子动力学模拟来进行SeO2气相扩散系数的理论计算.
一个自主开发的测试设备测量了SeO2气相扩散系数在393K和433K之间.
用富勒公式来纠正二进制和三进制气体混合物的扩散系数.
构建并验证了一种单滴吸收模型.

主要成果:

分子动力学模拟准确地预测了SeO2气相扩散系数.
实验测量验证了模拟结果.
修正后的扩散系数显著提高了单滴吸收模型的准确性,将误差从8.09%降至1.96%.

结论:

该研究提供了关键的气相扩散系数数据SeO2在低温范围内相关的煤炭燃烧烟气.
这些数据对于开发更有效的迁移机制和控制技术至关重要.
改进的模型精度有助于优化湿烟气脱硫过程,以减少排放.

关键词:

富勒的公式富勒的公式气相扩散系数气相扩散系数分子动力学模拟模型在SeO (((2)) 中使用.斯蒂芬扩散管方法

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