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一个有效的电还原反应堆输出口分成有价值的产品的有效策略
Mariana C N Bessa1,2, Azahara Luna-Triguero3,4, Jose M Vicent-Luna5
1Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Department of Chemical Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal.
Industrial & engineering chemistry research
|June 12, 2023
概括
模拟了两种压力摆动吸附 (PSA) 过程,以从二氧化碳电还原中净化甲,二氧化碳和合成气. 案例研究2实现了更高的甲纯度,但比案例研究1消耗更多的能量.
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
- 电化学 电化学 电化学
背景情况:
- 二氧化碳电降低提供了一条可持续的通往有价值化学品的途径.
- 有效分离甲,二氧化碳和合成气等产品对于工业可行性至关重要.
- 压力摇摆吸附 (PSA) 是气体分离的一个关键技术.
研究的目的:
- 设计和模拟两种双步PSA工艺,用于从二氧化碳电还原分离产品.
- 为了评估不同的热带石材料 (NaX和MFI) 以获得最佳的分离性能.
- 为了比较两个PSA配置的纯度,回收和能耗.
主要方法:
- 利用蒙特卡洛和分子动力学模拟来选热酸吸附剂.
- 设计并模拟了两个不同的双步压力摆动吸附 (PSA) 工艺配置.
- 分析了每个案例研究的产品纯度,回收率和特定能源消耗.
主要成果:
- 与案例研究1 (90.5%纯度,95.2%回收) 相比,案例研究2实现了更高的甲纯度 (97.5%) 和回收 (95.3%).
- 这两种工艺都成功地产生了高纯度的二氧化碳 (>97%) 和合成气 (H2/CO比率 > 4).
- 案例研究2显示能耗显著高 (64.9Wh/molCH4) 比案例研究1 (29.8Wh/molCH4).
结论:
- 双步PSA工艺可以有效地将甲,二氧化碳和合成气从二氧化碳电还原废水中分离出来.
- 工艺设计的选择会影响产品的纯度,回收和能源效率.
- 案例研究2适用于生产家用级甲,而案例研究1提供更低的能源消耗.
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