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Modeling of sorption enhanced steam methane reforming in an adiabatic packed bed reactor using various CO2 sorbents

Shahid, M. M ; Sharif University of Technology | 2021

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jece.2021.105863
  3. Publisher: Elsevier Ltd , 2021
  4. Abstract:
  5. A 1-D heterogeneous model of sorption-enhanced steam methane reforming (SE-SMR) process in a packed bed reactor consisting of nickel catalyst well mixed with CO2 sorbent particles is investigated for three types of common sorbents. The performance of SE-SMR process is studied under low medium pressure conditions (3 – 11 bar) to find the optimum operating conditions. Optimal CaO sorption corresponding to 82% CH4 conversion and 85% H2 purity is found at 900 K, 3 bar, 3.5 kgm−2s−1 and S/C of 3.0. In contrast, lithium zirconate (LZC) and hydrotalcite (HTC) sorbents exhibited best sorptions under the operating conditions of 773 K, 5 bar and S/C of 3 with CH4 conversion of 91.3% and 55.2%, and H2 purity of 94.1% and 77.8% respectively. In these conditions, the CH4 conversion increased by 114%, 111% and 67% compared to the conventional SMR for the processes enhanced by HTC, LZC and CaO sorption respectively. © 2021
  6. Keywords:
  7. Carbon dioxide ; Catalysts ; Chemical reactors ; Lithium compounds ; Methane ; Packed beds ; Sorbents ; Steam reforming ; CH$-4$ ; CH4 conversion enhancement ; CO2 capture ; Lithium zirconate ; Methane reforming ; Modeling ; Packed bed reactor ; Reforming process ; Sorbent ; Sorption-enhanced steam methane reforming ; Sorption
  8. Source: Journal of Environmental Chemical Engineering ; Volume 9, Issue 5 , 2021 ; 22133437 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S221334372100840X