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首页> 外文会议>Proceedings of the 43rd annual loss prevention symposium >Lifetime Expectancy of (slow) Autocatalytic Decomposing Materials
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Lifetime Expectancy of (slow) Autocatalytic Decomposing Materials

机译：（缓慢）自催化分解材料的预期寿命

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A large number of materials and substances show decomposition reactions during handling, production and transport. The amount of heat and pressure generated during this decomposition will determine if a substance can be considered thermally stable in arnspecific packaging size and temperature. Often the so called Self Accelerating Decomposition Temperature (SADT) is calculated for materials showing decomposition. This temperature is defined as the temperature at which the amount of heat produced byrnthe decomposition reaction is equal to the heat loss of its packaging. For materials decomposing according to a pseudo zero order reaction (Arrhenius like reactions) this method can be considered correct. For materials showing autocatalytic decompositions the amount of heat generated is dependent on product lifetime and the conditions it wasrnexposed to, which we will call history. This is in sharp contrast to the constant heat production that is shown in case of apseudo zero order reaction.rnIn order to calculate a conservative value for the SADT of autocatalytic decomposingrnmaterials the heat generated at the maximum speed of the reaction should be used. Thernspeed of decomposition varies a lot among different autocatalytic decomposing materialsrnthe under storage conditions. The time it takes to reach critical levels of heat productionrncan vary between hours to years depending on the type of material. For these type ofrnmaterials it is not relevant to determine the temperature at which self-heating occurs, butrnthe time it takes to reach a critical level of heat production at a certain temperature andrnpackage size.rnThis paper will first discuss the flaws of the different methods to determine the SADT inrncase of autocatalytic decomposing materials. Secondly a method is proposed to determine the life time expectancy of autocatalytic decomposing materials, taken intornaccount for the history of the material.
机译：大量材料和物质在处理，生产和运输过程中会发生分解反应。在分解过程中产生的热量和压力将决定某种物质在特定包装尺寸和温度下是否可以认为是热稳定的。通常对显示分解的材料计算所谓的自加速分解温度（SADT）。该温度定义为分解反应产生的热量等于其包装的热损失的温度。对于根据伪零级反应（类似于阿伦尼乌斯反应）分解的物质，该方法可以被认为是正确的。对于表现出自催化分解作用的材料，产生的热量取决于产品的寿命及其暴露的条件，我们将其称为历史。这与在伪零级反应情况下显示的恒定产热形成鲜明对比。为了计算自催化分解材料的SADT的保守值，应使用在最大反应速度下产生的热量。在储存条件下，不同的自催化分解材料的分解速度变化很大。达到热量产生临界水平所需的时间根据材料类型的不同而在数小时至数年之间变化。对于这些类型的材料，确定自热发生的温度无关紧要，而是确定在一定温度和包装尺寸下达到临界热量水平所花费的时间。本文首先将讨论不同方法的缺陷。确定自催化分解材料的SADT情况。其次，考虑到材料的历史，提出了一种确定自催化分解材料寿命的方法。

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  • 会议地点 Tampa FL(US);Tampa FL(US);Tampa FL(US)
  • 作者

    Vincent van den Hoogenband; Wim A. Mak; Nico H.A. Versloot;

  • 作者单位

    TNO Defence, Security and Safety, Department of Energetic Materials Rijswijk, The Netherlands;

    TNO Defence, Security and Safety, Department of Energetic Materials Rijswijk, The Netherlands;

    TNO Defence, Security and Safety, Department of Energetic Materials Rijswijk, The Netherlands;

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