This study presents a risk assessment study on an amine-based CO2 capture process. Based on the critical risks identified by a hazard and operability study (HAZOP) conducted in our previous work, we performed detailed quantitative risk assessment, including frequency estimation using fault tree analysis (FTA) and consequence estimation using the process hazard analysis software tool (PHAST). As a result of our FTA study on explosion accidents in the absorber column as a top event, we identified 25 basic events and eight intermediate events that lead to the top event. The probability of a T-102 explosion was estimated to approximately 3.55E-03 per year, which satisfies international safety regulations. Additionally, we performed consequence estimation for three types of accidents in an absorber, namely toxic substance leakage, explosions, and fireballs, under two different weather conditions, namely modest and worst conditions. It was determined that in the event of a toxic substance leakage accident, the effect zone of acid gas with high toxic substance content is approximately four-times larger than that of raw gas.

中文翻译：

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基于胺的 CO2 捕获过程的定量风险评估

本研究介绍了一项基于胺的 CO2 捕获过程的风险评估研究。基于在我们之前的工作中进行的危害和可操作性研究 (HAZOP) 确定的关键风险，我们进行了详细的定量风险评估，包括使用故障树分析 (FTA) 的频率估计和使用过程危害分析软件工具 (PHAST) 的后果估计）。作为我们将吸收塔爆炸事故作为顶事件进行 FTA 研究的结果，我们确定了 25 个基本事件和 8 个导致顶事件的中间事件。T-102 爆炸的概率估计约为每年 3.55E-03，符合国际安全规定。此外，我们还对吸收塔中的三种事故进行了后果估计，即有毒物质泄漏、爆炸、和火球，在两种不同的天气条件下，即温和和最坏的条件。经测定，一旦发生有毒物质泄漏事故，有毒物质含量高的酸性气体的影响范围约为原料气的四倍。