对CO2的预测洞察力,在流体床反应堆中在不同的Ca循环条件下捕获碳化转换率
Hamidreza Ramezan Behtash1, Maryam Tahmasebpoor2,3, Mohammadreza Tizfahm1
1Faculty of Chemical & Petroleum Engineering, University of Tabriz, P.O. Box, Tabriz, 51666-16471, Iran.
概括
高二氧化硫 (SO2) 度和重复的碳化循环显著降低了石灰岩的度.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
背景情况:
- 循环是碳捕获和储存 (CCS) 的一个关键技术.
- 吸附剂的性能,特别是石灰岩的碳化效率,对于工艺的可行性至关重要.
- 烟气中的二氧化硫 (SO2) 杂质可能会影响吸附剂的反应性和工艺效率.
研究的目的:
- 为了研究SO2度变化的影响石灰岩碳化转化在循环碳捕获期间.
- 在不同的SO2水平和循环数下建模碳化反应动力学.
- 用最合适的动力模型预测长期碳化性能.
主要方法:
- 在双重互连的流化床反应堆中使用石灰岩进行实验性碳化试验.
- 在三种SO2条件下进行测试:无硫 (NS),75ppm (SP) 和1500ppm (SR).
- 使用收缩核心模型 (SCM),随机孔模型 (RPM) 和碎形类随机孔模型 (RPM-F) 的动态建模.
主要成果:
- 较高的SO2度和增加的碳化循环显著降低了碳化转化.
- 在NS条件下,碳化转化率从28.6% (周期1) 降至8.8% (周期10).
- RPM-F模型显示最适合实验数据,在第一周期的最大绝对误差为1.7% (NS),1.3% (SP) 和0.9% (SR).
结论:
- 二氧化硫在循环中对石灰岩的碳化效率产生负面影响.
- 碎形类随机孔模型 (RPM-F) 准确地描述了碳化动力学.
- 预测的100周期转换量大大减少,特别是在高SO2条件下 (SR中为0.19%).
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