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Energy and exergy analysis of hydrogen production from ammonia decomposition systems using non-thermal plasma
International Journal of Hydrogen Energy ( IF 8.1 ) Pub Date : 2020-09-17 , DOI: 10.1016/j.ijhydene.2020.08.249
Mostafa El-Shafie , Shinji Kambara , Yukio Hayakawa

In the current study, the energy and exergy efficiencies of three hydrogen production systems from ammonia decomposition using dielectric barrier discharge plasma (DBD) were comparatively evaluated. The hydrogen gas was separated in a cylindrical plasma membrane reactor (PMR) using the Pd–Cu40% membrane with a thickness of 20 μm. The pre-catalytic reactor (CR) is added to the second system (CR-PMR), additionally, the CR is filled with the catalytic material type of 2%Ru/Al2O3 and the CR temperature is raised to 450 °C. Furthermore, the zeolite material type of SA-600 A was added to the PMR in the third H2 production system (PMR) to enhance the hydrogen permeation through the Pd–Cu membrane. The hydrogen production rate was enhanced by combining the plasma and zeolite material in the third system (CR-CPMR). Moreover, the maximum obtained hydrogen production rates were 2.66, 81.6, and 96.6% in PMR, CR-PMR, and CR-CPMR or catalytic PMR, respectively. Also, it was observed that the energy efficiency increased by adding the CR to the system, while, the exergy efficiency values of all ammonia decomposition systems were still low due to the effect of system irreversibility. Additionally, the maximum energy efficiencies values were 0.8, 16.1, 44.1%, while the maximum exergy efficiencies values were 0.156, 4.91, and 6.344% for PMR, CR-PMR, and CR-CPMR, respectively. The exergy destruction rate of all NH3 decomposition systems was still high although using the modified systems. The depletion factor is enhanced with the feeding ammonia flow rate increased while the sustainability index decreased at the same flow rates. Moreover, it was seen that the depletion factor results of PMR only were higher than other systems due to the exergy destruction rate was high.



中文翻译:

使用非热等离子体从氨分解系统生产氢气的能量和火用分析

在目前的研究中,比较评估了使用介质阻挡放电等离子体 (DBD) 分解氨的三个制氢系统的能量和火用效率。氢气在圆柱形质膜反应器 (PMR) 中使用厚度为 20 μm 的 Pd-Cu40% 膜进行分离。预催化反应器(CR)加入到第二个系统(CR-PMR)中,另外在CR中填充2%Ru/Al 2 O 3的催化材料类型,将CR温度升至450℃ . 此外,SA-600 A 沸石材料类型被添加到第三个 H 2生产系统 (PMR) 以增强氢通过 Pd-Cu 膜的渗透。通过在第三个系统 (CR-CPMR) 中结合等离子体和沸石材料,提高了产氢率。此外,在 PMR、CR-PMR 和 CR-CPMR 或催化 PMR 中获得的最大产氢率分别为 2.66、81.6 和 96.6%。此外,还观察到通过向系统添加 CR 提高了能效,而由于系统不可逆性的影响,所有氨分解系统的火用效率值仍然很低。此外,最大能效值为 0.8、16.1、44.1%,而 PMR、CR-PMR 和 CR-CPMR 的最大能效值分别为 0.156、4.91 和 6.344%。所有NH 3的火用破坏率尽管使用了改进的系统,但分解系统仍然很高。消耗因子随着进料氨流量的增加而增强,而可持续性指数在相同的流量下下降。此外,可以看出,由于火用破坏率高,仅 PMR 的损耗因子结果高于其他系统。

更新日期:2020-09-17
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