Mathematical Modeling of Atmospheric Dispersion from Accidental Release of Ammonia (NH3) during Road Transport

Q4 Physics and Astronomy

Defect and Diffusion Forum Pub Date : 2023-07-14 DOI:10.4028/p-P4v9qE

Carolina Pinz Medronha, Ana Paula Rozado Gomes, G. J. Weymar, C. C. de Escobar, D. Buske

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Abstract

This work aimed to analyze the atmospheric dispersion of ammonia gas (NH3) caused by a hypothetical leak in a tanker truck due to an accident during its transport. These accidents with dangerous products in road transport are unpredictable and can generate severe impacts on communities' borders and the environment close to the accident site. With the use of mathematical models, it is possible to estimate, assuming that there was an accidental release, how far, from the point of leakage to the cloud formed in the atmosphere will move until it is diluted in a way that does not pose a danger of toxicity. In this work, the ALOHA software and Google Earth will be used to estimate the dispersion of this toxic gas in different scenarios, varying the stability class and the height of the leak orifice. Among the proposed and analyzed scenarios, the results show that the plume with the greatest reach was 948 m in the red zone (AEGL 3 - 1100 ppm or 769 mg/m3), 1900 meters in the orange zone (AEGL 2 - 160 ppm or 112 mg /m3) and 3600 meters in the yellow zone (AEGL 1 - 30 ppm or 21 mg/m3).

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道路运输过程中氨(NH3)意外释放引起的大气扩散的数学模型

本研究旨在分析一辆油罐车在运输过程中发生事故而导致的假想泄漏所引起的氨气(NH3)在大气中的扩散。道路运输中的这些危险产品事故是不可预测的，并可能对事故现场附近的社区边界和环境产生严重影响。通过使用数学模型，可以估计，假设有一次意外释放，从泄漏点到大气中形成的云将移动多远，直到它被稀释到不构成毒性危险的程度。在这项工作中，ALOHA软件和谷歌Earth将用于估计这种有毒气体在不同情况下的扩散，改变稳定性等级和泄漏孔的高度。结果表明，在提出和分析的情景中，红色区域(AEGL 3 ~ 1100 ppm或769 mg/m3)的羽流深度最大，为948 m，橙色区域(AEGL 2 ~ 160 ppm或112 mg/m3)为1900 m，黄色区域(AEGL 1 ~ 30 ppm或21 mg/m3)为3600 m。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Defect and Diffusion Forum Physics and Astronomy-Radiation

CiteScore

1.20

自引率

0.00%

发文量

127

期刊介绍： Defect and Diffusion Forum (formerly Part A of ''''Diffusion and Defect Data'''') is designed for publication of up-to-date scientific research and applied aspects in the area of formation and dissemination of defects in solid materials, including the phenomena of diffusion. In addition to the traditional topic of mass diffusion, the journal is open to papers from the area of heat transfer in solids, liquids and gases, materials and substances. All papers are peer-reviewed and edited. Members of Editorial Boards and Associate Editors are invited to submit papers for publication in “Defect and Diffusion Forum” . Authors retain the right to publish an extended and significantly updated version in another periodical.