Thermal decomposition behavior of casting raw materials under different atmospheres and temperatures.

IF 3.9 2区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Scientific Reports Pub Date : 2025-02-18 DOI:10.1038/s41598-025-90297-5

Dandan Wang, Ying Liu, Laihong Zhang, Yaqiu Lu, Kai Li, Xinsheng Zhu, Jingyi Han, Xuming Zhang

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Abstract

To determine the volatile organic compounds (VOCs) generated by casting resin sand and its binder during the casting process, this paper studied the process of resin pyrolysis and the different types of VOCs generated under different atmospheric conditions, as well as the temperature range of which the main pollutants are produced. Results indicate that resin pyrolysis can affect the types and characteristics of products under different atmospheric conditions. Oxygen in the air can accelerate the decomposition or combustion of organic matter in the sample. Under anaerobic conditions, the main products are benzene and ester products, primarily including dimethyl succinate and 1,2,3,5-tetramethylbenzene, in temperature range of 200-600 ℃. Under oxygen-containing conditions, the main products are ethers, benzene, and hydrocarbons, specifically ethylene oxide and 2-methylbutane, produced at temperatures above 200 ℃. This study provides theoretical guidance for the optimization design and environmental protection of molding sand and its binders in the casting industry, and provides technical support for the industrial application and development of molding sand.

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铸造原料在不同气氛和温度下的热分解行为。

为了确定铸造树脂砂及其粘结剂在铸造过程中产生的挥发性有机化合物（VOCs），本文研究了树脂热解过程和不同大气条件下产生的不同类型的VOCs，以及主要污染物产生的温度范围。结果表明，不同大气条件下树脂热解对产物的类型和特性有影响。空气中的氧气能加速样品中有机物的分解或燃烧。厌氧条件下，反应温度200 ~ 600℃，主要产物为苯和酯类产物，主要有琥珀酸二甲酯和1,2,3,5-四甲基苯。在含氧条件下，在200℃以上的温度下产生的主要产物是醚、苯和碳氢化合物，特别是环氧乙烷和2-甲基丁烷。本研究为铸造行业型砂及其粘结剂的优化设计和环保提供理论指导，为型砂的工业应用和发展提供技术支持。

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

Scientific Reports Natural Science Disciplines-

CiteScore

7.50

自引率

4.30%

发文量

19567

审稿时长

3.9 months

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