用Pd-Ag膜反应器用于低温干式改造生物气-A模拟研究
Matilde Albano1,2, Luís M Madeira3,4, Carlos V Miguel2
1Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
Membranes
|July 28, 2023
概括
这项研究模拟了用于生物气改造的膜反应堆,显示了在较低温度下改善的生产. 然而,像焦炭形成和CO抑制这样的挑战需要进一步的解决方案来实现实际应用.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 可再生能源技术可再生能源技术
- 催化剂是一种催化剂.
背景情况:
- 生物气是减轻温室气体排放的关键可再生能源.
- 甲干改造 (DRM) 使用CO2和CH4产生,但面临着催化剂失活和高温 (700-950°C) 等挑战.
- 膜反应器 (MRs) 通过改变平衡并抑制副作用反应,为低温DRM提供了潜在的解决方案.
研究的目的:
- 通过使用带有Pd-Ag膜的模拟膜反应器 (MRs) 来研究生物气改造.
- 分析温度,压力和生物气组成对MR性能的影响.
- 评估低温DRM的可行性,以提高的生产.
主要方法:
- 用薄 (3.4微米) 和厚 (50微米) 的Pd-Ag膜模拟膜反应器.
- 分析工艺指标,包括CH4和CO2转换,H2产量,H2/CO比率和H2回收.
- 评估CO抑制对通过厚膜的气流的影响.
主要成果:
- 增加料温度 (450-550°C) 改善了CO2和CH4的转化和在薄型MR中的H2产量.
- 更高的压力导致H2产量增加,但也加速了焦炭的形成.
- 升高的CH4/CO2比率增加了H2/CO比率,但降低了H2产量.
- CO显著抑制了H2的摩尔流量 (大约. 15%) 通过厚膜.
结论:
- 膜反应器有效抑制逆水气转移反应,并提高生物气改造中的H2产量.
- 焦炭形成和CO抑制H2透是实际MR应用的关键限制.
- 需要进一步的研究来制定战略,以克服高效的低温DRM的这些局限性.
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