Loading...
Please wait, while we are loading the content...
Similar Documents
Thermodynamic Insight in Design of Methanation Reactor with Water Removal Considering Nexus between $CO_{2}$ Conversion and Irreversibilities
Content Provider | MDPI |
---|---|
Author | Bj, ørn Austbø Hashemi, Sayed Ebrahim Lien, Kristian M. Hillestad, Magne Schnell, Sondre K. |
Copyright Year | 2021 |
Description | The inevitable nexus between energy use and $CO_{2}$ emission necessitates the development of sustainable energy systems. The conversion of $CO_{2}$ to $CH_{4}$ using green $H_{2}$ in power-to-gas applications in such energy systems has attracted much interest. In this context, the present study provides a thermodynamic insight into the effect of water removal on $CO_{2}$ conversion and irreversibility within a $CO_{2}$ methanation reactor. A fixed-bed reactor with one intermediate water removal point, representing two reactors in series, was modeled by a one-dimensional pseudo-homogeneous model. Pure $CO_{2}$ or a mixture of $CO_{2}$ and methane, representing a typical biogas mixture, were used as feed. For short reactors, both the maximum conversion and the largest irreversibilities were observed when the water removal point was located in the middle of the reactor. However, as the length of the reactor increased, the water removal point with the highest conversion was shifted towards the end of the reactor, accompanied by a smaller thermodynamic penalty. The largest irreversibilities in long reactors were obtained when water removal took place closer to the inlet of the reactor. The study discusses the potential benefit of partial water removal and reactant feeding for energy-efficient reactor design. |
Starting Page | 7861 |
e-ISSN | 19961073 |
DOI | 10.3390/en14237861 |
Journal | Energies |
Issue Number | 23 |
Volume Number | 14 |
Language | English |
Publisher | MDPI |
Publisher Date | 2021-11-24 |
Access Restriction | Open |
Subject Keyword | Energies Environmental Engineering Methanation Water Removal Reactor Design Co2 Conversion Irreversibility |
Content Type | Text |
Resource Type | Article |