Influence of CaO precursor on CO2 capture performance and sorption-enhanced steam ethanol reforming |
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| Affiliation: | 1. Center of Excellence in Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand;2. Department of Chemical Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakhon Pathom, 73000, Thailand;3. Department of Chemical Engineering, Faculty of Engineering, King Mongkut''s University of Technology North Bangkok, Bangkok, 10800, Thailand;4. The Joint Graduate School of Energy and Environment, King Mongkut''s University of Technology Thonburi, Bangkok, 10140, Thailand;5. Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300072, China;1. School of Energy and Power Engineering, Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, 116023 Dalian, China;2. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;1. Center of Excellence in Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand;2. International School of Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand;3. Department of Chemical Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakhon Pathom 73000, Thailand;1. Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok, 10330, Thailand;2. Department of Chemical Engineering, Faculty of Engineering, King Mongkut''s University of Technology North Bangkok, Bangkok, 10800, Thailand;3. Department of Chemical Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakhon Pathom, 73000, Thailand;4. The Joint Graduate School of Energy and Environment, King Mongkut''s University of Technology Thonburi, Bangkok, 10140, Thailand;5. Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Collaboratorative Innovation Center of Chemical Science and Engineering, Tianjin, 300072, China;1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China;2. School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore |
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| Abstract: | This work presents the effect of calcium and carbonate precursors on properties of CaCO3. The synthetic CaCO3 samples were transformed into CaO and tested their application to high-temperature CO2 capture. Four different sorbent precursors were investigated in this work, including calcium chloride (CaCl2) and calcium acetate (CaAc2) as calcium precursor, and sodium carbonate (Na2CO3) and urea (CO(NH2)2) as carbonate precursor. The results show that both calcium and carbonate precursors affect morphologies of CaCO3; CaCO3,Cl-Urea, and CaCO3,Cl-Na have calcite phase, whereas mixed-phases of calcite (30%) and vaterite (70%) are observed with CaCO3,Ac-Na, and aragonite is found with CaCO3,Ac-Urea. CaCO3,Cl-Na exhibits small cubic (rhombohedral) particle, CaCO3,Cl-Urea possesses spherical particle with rough surface, CaCO3,Ac-Na has spherical-like morphology with smooth surface, and CaCO3,Ac-Urea possesses aggregated form of CaCO3 particles. For application to CO2 capture, CaO derived from CaCO3,Ac-Urea provides the highest CaO conversion of 80% at 700 °C. The synthetic CaO-based sorbents were further incorporated with nickel oxide to form one-body bi-functional catalysts for H2 production from sorption-enhanced steam ethanol reforming. The results show that 87%H2 purity could be obtained with pre-breakthrough period of 60 min. Sorbent reactivity can be maintained the production of H2 for at least 10 consecutive cycle tests. |
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| Keywords: | CaO Bi-functional material Sorption-enhanced steam ethanol reforming |
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