Comparative numerical analysis for an efficient hydrogen production via a steam methane reforming with a packed-bed reactor, a membrane reactor, and a sorption-enhanced membrane reactor. (1st June 2020)

• Record Type: Journal Article
• Authors: Lee, Hyunjun; Kim, Ayeon; Lee, Boreum; Lim, Hankwon
• Is Part Of: Energy conversion and management. Volume 213(2020)
• Publication Date: 2020-06-01
• Subjects: Numerical simulation -- H2 production method -- Membrane -- CO2 capture -- Sorption-enhanced membrane reactor; Direct energy conversion -- Periodicals; Energy storage -- Periodicals; Energy transfer -- Periodicals; Énergie -- Conversion directe -- Périodiques; Direct energy conversion; Periodicals; 621.3105
• DOI: 10.1016/j.enconman.2020.112839
• Languages: English
• ISSNs: 0196-8904

Abstract

Highlights: Comparative numerical analysis of steam methane reforming with 5 different reactor systems was conducted. Robust numerical model was developed considering thermodynamic analysis under non-isothermal conditions. 6 different inorganic membranes were examined applying developed numerical model. Technical insights for hydrogen production and membrane properties were provided. Abstract: Following the adoption of the Paris Agreement, H2 has come to be considered a promising alternative energy carrier owing to its eco-friendly characteristics. However, H2 is mostly obtained via carbon-based production methods, which account for approximately 96% of the global H2 yield and emit CO2 as a by-product. A membrane reactor (MR) was introduced to produce H2 more efficiently via a positive chemical equilibrium shift, according to Le Chatelier 's principle. CaO was employed as a CO2 adsorbent in an MR to form a sorption-enhanced membrane reactor (SEMR), in which the additional CO2 removal enhanced the equilibrium shift. Additionally, the direction of sweep gas through the membrane with respect to that of the reactants, i.e., co-current or counter-current flow, was found to affect the performance of the reactors. In this study, numerical simulations based on chemical reaction kinetics were carried out to investigate the effects of the employment of H2 separation membrane and/or CO2 adsorbent as well as those of co-current and counter-current flows. Based on the numerical simulation results, H2 yield rates of 0.00143, 0.00145, 0.00127, 0.00121, and 0.00852 mol s −1 were achieved using the SEMR with counter-current flow, SEMR with co-current flow, MR with counter-current flow, MR with co-current flow, and a packed-bed reactor, respectively. This showed that an SEMR can be used to not only enhance H2 production but also achieve this in an environment-friendly manner.