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由于固定和流化床反应堆中催化剂失活而导致的性能损失的建模
M Andrea Pappagallo1,2, Tilman J Schildhauer1, Oliver Kröcher1,2
1Center for Energy and Environmental Science, Paul Scherrer Institut, Villigen 5232, Switzerland.
概括
一种新方法评估了反应堆中的催化剂失活,显示流化床耐焦化时间比固定床长5至50倍. 这个模型优化了反应堆设计,以保持持续的性能.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 催化科学 催化科学
- 反应工程的反应工程.
背景情况:
- 催化反应堆容易失效,影响全球性能.
- 焦化是一种重要的失活机制,特别是在CO甲化中.
- 评估停机的影响对于反应堆的寿命和效率至关重要.
研究的目的:
- 开发一种方法来评估禁用现象对催化反应堆性能的影响.
- 将这种方法应用于CO甲化与焦化诱导的非活性化.
- 将该方法扩展到其他反应和关闭机制.
主要方法:
- 整合一个单一微分方程来建模随时间推移的催化剂活动.
- 通过在活动水平下降的连续稳定状态来评估反应器配置文件.
- 将模型应用于固定床和流化床甲化反应堆.
主要成果:
- 在固定反应堆和流化反应堆中成功模拟了CO甲化.
- 准确地描述了由于焦化而导致的CO转化减少.
- 经过证明的流化床反应器对失活的抗性更高 (5-50倍更长的时间到25%的转换).
结论:
- 开发的方法有效地评估了关闭对反应堆性能的影响.
- 流化床反应堆在类似条件下的固定床反应堆相比,具有较高的抗失效性.
- 该模型可以优化反应堆的几何形状,尺寸和操作条件,以提高长期性能.
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