title: Study on biomass circulation and gasification performance in a clapboard-type internal circulating fluidized bed gasifier.
abstract: We investigated the solid particle flow characteristics and biomass gasification in a clapboard-type internal circulating fluidized bed reactor. The effect of fluidization velocity on particle circulation rate and pressure distribution in the bed showed that fluidization velocities in the high and low velocity zones were the main operational parameters controlling particle circulation. The maximum internal circulation rates in the low velocity zone came almost within the range of velocities in the high velocity zone, when u(H)/u(mf)=2.2-2.4 for rice husk and u(H)/u(mf)=3.5-4.5 for quartz sand. In the gasification experiment, the air equivalence ratio (ER) was the main controlling parameter. Rice husk gasification gas had a maximum heating value of around 5000 kJ/m(3) when ER=0.22-0.26, and sawdust gasification gas reached around 6000-6500 kJ/m(3) when ER=0.175-0.24. The gasification efficiency of rice husk reached a maximum of 77% at ER=0.28, while the gasification efficiency of sawdust reached a maximum of 81% at ER=0.25.
authors.affiliation: CAS Key Laboratory of Renewable Energy and Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, China.
authors.forename: Zhao-qiu
authors.initials: ZQ
authors.lastname: Zhou
authors.forename: Long-long
authors.initials: LL
authors.lastname: Ma
authors.forename: Xiu-li
authors.initials: XL
authors.lastname: Yin
authors.forename: Chuang-zhi
authors.initials: CZ
authors.lastname: Wu
authors.forename: Li-cheng
authors.initials: LC
authors.lastname: Huang
authors.forename: Chu
authors.initials: C
authors.lastname: Wang
mesh_terms: D018533:Biomass; D001709:Biotechnology / Q000295:instrumentation / Q000379:methods; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005740:Gases / Q000737:chemistry*; D006358:Hot Temperature; D012275:Oryza / Q000737:chemistry; D010316:Particle Size; D011312:Pressure; D014934:Wood / Q000737:chemistry
chemical_list: D005740:Gases