A novel continuous reactor with shaftless spiral for chemical looping gasification and the control of operating parameters |
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| Affiliation: | 1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, 100190, China;2. University of Chinese Academy of Sciences, Beijing, 100049, China;1. College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China;2. School of Electric Power, South China University of Technology, Guangzhou 510640, China;1. Postgraduate Program in Materials Science and Engineering, Federal University of Rio Grande do Norte, 59078-970, Natal, Brazil;2. Postgraduate Program in Chemistry, Federal University of Rio Grande do Norte, 59078-970, Natal, Brazil;3. Centro de Pesquisas Leopoldo Américo Miguez de Mello – CEMPES, Petrobras, Cidade Universitária, 21941-598, Rio de Janeiro, Brazil;4. Instituto de Carboquimica (CSIC). Miguel Luesma Castan 4, 50018, Zaragoza, Spain;1. State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen, Guangdong 518000, China |
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| Abstract: | A novel continuous reactor with shaftless spiral for chemical looping gasification (CLG) of rice husk is expected to propose for application and optimal parameter. Syngas concentration, efficiency, lower heating value of syngas and micromorphology structure were investigated under different conditions of temperature, ratio of OC and rice husk (O/C) and speed. The results indicated that CLG in the shaftless spiral reactor had a better performance. The gas yield, carbon conversion efficiency and gasification efficiency were 73.33%, 63.92% and 98.26% higher than that of fixed-bed reactor, respectively. Further, higher temperature obviously enhanced gas production and efficiency but was easy to cause agglomeration and harmful to OC regeneration. Furthermore, lower O/C would increase the combustible gas production but cause a serious sintering and decrease gas production and carbon conversion efficiency. Moreover, lower speed would promote the gas production and efficiency but cause agglomeration. In addition, lower speed had a greater effect on H2 yield than CO. As a result, the shaftless spiral reactor was beneficial to CLG. The best performance with gas production of 70.99% and gasification efficiency of 67.80% was obtained in shaftless spiral reactor under the optimal parameters with temperature of 800 °C, O/C of 1.5 and speed of 5.5 r/min. |
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| Keywords: | Continuous reactor Shaftless spiral Chemical looping gasification Operating parameters Rice husk |
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