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Alkaline pyrolysis of anaerobic digestion residue with selective hydrogen production
Affiliation:1. School of Environment, Tsinghua University, Beijing, 100084, China;2. School of Management, China University of Mining and Technology (Beijing), Beijing, 100083, China;3. Beijing Engineering Research Center of Biogas Centralized Utilization, Beijing, 100084, China;4. Centre for Resource and Environmental Research, Beijing University of Chemical Technology, Beijing, 100029, China;1. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China;2. CAS Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Guangzhou, 510640, China;1. Centre of Hydrogen Energy, Institute of Future Energy, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia;2. School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia;3. Industrial Centre of Innovation in Energy Management, SIRIM Berhad, 40700 Shah Alam, Selangor, Malaysia;4. School of Environmental Engineering, Universiti Malaysia Perlis, Kompleks Pusat Pengajian Jejawi 3, 02600 Arau, Perlis, Malaysia;1. School of Environment, Tsinghua University, Beijing 100084, China;2. Key Laboratory for Solid Waste Management and Environment Safety, Ministry of Education, Beijing, 100084, China;3. School of Environmental Science and Technology, Dalian University of Technology, Dalian, Liaoning 116024, China
Abstract:Hydrogen (H2) production from biomass has attracted the research attention as it is renewable and clean. This work investigates the alkaline pyrolysis (AP) of corn stover digestate (CSD) with sodium hydroxide (NaOH) to promote the production of H2 and suppress carbon dioxide (CO2) at moderate conditions. It is observed that the H2 production is affected by the mass ratio of CSD to NaOH and reaction temperature. The H2 yield is enhanced from 1:1 to 1:2 ratio of CSD to NaOH (10.9–25.9 mmol g?1) with the purity of 81.21–84.98% at 500 °C, whereas a slight increase in H2 production at 1:3 ratio of CSD to NaOH is observed which may attribute to the mass transfer matter. The possible mechanism of AP is identified. Through the thermogravimetric analysis (TGA), distributed activation energy model (DAEM) was applied which evidences the catalytic ability of NaOH via the reduced activation energies.
Keywords:Hydrogen production  Corn stover digestate  Alkaline pyrolysis  Sodium hydroxide  Distributed activation energy model (DAEM)
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