粮食的辐射点火特性和点火时的表面温度

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-01-02 DOI:10.1177/07349041231220840

A.B.C. Oguaka, Natalia Flores-Quiroz, Richard Walls

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引用次数: 0

摘要

粮食在储存、运输和加工设施中的防火安全要求了解其燃烧特性，本研究已确定了其中一些特性。研究了含水量为 10% 的豇豆、扁豆、小米、大豆、去壳花生、亚麻（亚麻籽）、葵花籽、去壳花生和芝麻。使用锥形量热计加热器对粮食施加 25、35 和 47.5 kW/m2 的辐射热流量，以确定引燃时间和点火时的表面温度 ( Ts,ig)。点火温度 ( Tig) 是根据实验确定的临界热通量计算得出的。此外，还计算了对确定食物颗粒点火特性至关重要的热反应参数和热惯性（[公式：见正文]）。热反应参数似乎最适合用来区分粮食的可燃性。点燃温度在 239°C 至 305°C 之间，而热反应参数在 261 至 565 kWs0.5/m2 之间。小颗粒大小的谷物显示出更高的可燃性。

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Radiative ignition properties of food grains and surface temperatures at ignition

Fire safety of food grains in storage, transport and processing facilities requires knowledge of their ignition properties some of which have been determined in this study. Cowpea, lentils, millet, soybean, unshelled peanut, flax (linseed), sunflower, shelled peanut and sesame, at 10% moisture content were studied. A cone calorimeter heater was used to impose radiative heat fluxes of 25, 35 and 47.5 kW/m2 on the food grains to determine the time to piloted ignition concurrently with the surface temperature at ignition ( Ts,ig). Ignition temperatures ( Tig) were calculated from experimentally determined critical heat fluxes. The thermal response parameter and thermal inertia ([Formula: see text]) essential for the characterization of the ignition of the food grains were also calculated. Thermal response parameter appears to be best suited for distinguishing the ignitability of the food grains. Ignition temperatures range between 239°C and 305°C, while thermal response parameter varies between 261 and 565 kWs0.5/m2. Small particle-sized grains showed higher ignitability.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.