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Novel quasi-autothermal hydrogen production process in a fixed-bed using a chemical looping approach: A numerical study.
- Source :
-
International Journal of Hydrogen Energy . Jun2017, Vol. 42 Issue 22, p15010-15023. 14p. - Publication Year :
- 2017
-
Abstract
- This paper presents a novel quasi -autothermal hydrogen production process. The proposed layout couples a Chemical Looping Combustion (CLC) section and a Steam Methane Reforming (SMR) one. In CLC section, four packed-beds are operated using Ni as oxygen carrier and CH 4 as fuel to continuously produce a hot gaseous mixture of H 2 O and CO 2 . In SMR section, two fixed-beds filled with Ni-based catalyst convert CH 4 and H 2 O into a H 2 -rich syngas. Four heat exchangers were employed to recover residual heat content of all the exhaust gas currents. By means of a previously developed 1D numerical model, a dynamic simulation study was carried out to evaluate feasibility of the proposed system in terms of methane conversion (100% circa), hydrogen yield (about 0.65 mol H2 /mol CH4 ) and selectivity (about 70%), and syngas ratio (about 2.3 mol H2 /mol CO ). Energetic and environmental analyses of the system performed with respect to conventional steam methane reforming, highlights an energy saving of about 98% and avoided CO 2 emission of about 99%. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 42
- Issue :
- 22
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 123374005
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2017.05.017