The coupling performance during reactive sorption enhanced reforming (ReSER) process: Simulation and experimental studies. (11th October 2019)

• Record Type: Journal Article
• Authors: Ping, Haoliang; Wu, Sufang
• Is Part Of: International journal of hydrogen energy. Volume 44:Number 49(2019)
• Page Start: 26943
• Page End: 26954
• Publication Date: 2019-10-11
• Subjects: Hydrogen -- Carbon dioxide -- Reactive sorption-enhanced reforming -- Nano-CaO -- Methane; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2019.08.152
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The coupling performance of nano-CaO carbonation with the steam methane reforming (SMR) during reactive sorption enhanced reforming process (ReSER) for hydrogen production was studied by simulation and experimental evaluation. A two-dimensional axial symmetric pseudo-homogeneous mathematic model was established based on nano-CaO carbonation kinetics with the Boltzmann equation style and SMR reaction kinetics. The coupling performance was studied by varying carbonation rate constant ( k carb ) and the maximum carbonation conversion ( X max ) in the model. The mathematic model was numerically solved by the COMSOL Multiphysics software and experimentally evaluated using commercial nano-CaO as the CO2 adsorbent. An average relative deviation of 3.86% of CH4 conversion was obtained between the simulated and experimental results. The simulation results indicated the conversion of the CH4 was improved from 88% to 95.3% by increasing k carb from 1.6 s −1 to 5.74 s −1 and the period of pre-breakthrough time could be extended from 2 min to 20 min by increasing X max from 0.3 to 0.9. CH4 conversion of maximum 94.1% when reaction was under 650 °C and 1 bar, the highest molar fraction of H2 of 99.7% when reaction at 600 °C and 1 bar, and the maximum enhancement factor of 45.4% was obtained at 576.3 °C, 2.8 bar. Graphical abstract: A two-dimensional axial symmetric pseudo-homogeneous mathematic model based on a fixed bed reactor was set up to study the coupling performance during reactive sorption enhanced reforming (ReSER) process.Image 1 Highlights: The coupling performance during ReSER process was studied. A mathematic model was set up and experimentally validated the simulate results. Response surface analysis was carried out for studying the optimum reaction condition.