Biomass-oxygen gasification in a high-temperature entrained-flow gasifier.
The technology associated with indirect biomass liquefaction is currently arousing increased attention, as it could ensure a supply of transportation fuels and reduce the use of petroleum. The characteristics of biomass-oxygen gasification in a bench-scale laminar entrained-flow gasifier were studied in the paper. Experiments were carried out to investigate the influence of some key factors, including reaction temperature, residence time and oxygen/biomass ratio, on the gasification. The results indicated that higher temperature favored H2 and CO production. Cold gas efficiency was improved by N10% when the temperature was increased from 1000 to 1400 degrees C. The carbon conversion increased and the syngas quality was improved with increasing residence time. A shorter residence resulted in incomplete gasification. An optimal residence time of 1.6 s was identified in this study. The introduction of oxygen to the gasifier strengthened the gasification and improved the carbon conversion, but lowered the lower heating value and the H2/CO ratio of the syngas. The optimal oxygen/biomass ratio in this study was 0.4. The results of this study will help to improve our understanding of syngas production by biomass high-temperature gasification.
Zhou
Jinsong
J
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China. zhoujs@cmee.zju.edu.cn
Chen
Qing
Q
Zhao
Hui
H
Cao
Xiaowei
X
Mei
Qinfeng
Q
Luo
Zhongyang
Z
Cen
Kefa
K
D018533:Biomass; D001709:Biotechnology / Q000295:instrumentation / Q000379:methods; D002245:Carbon Dioxide / Q000032:analysis; D002248:Carbon Monoxide / Q000032:analysis; D004736:Energy-Generating Resources; D004867:Equipment Design; D005740:Gases / Q000737:chemistry*; D006358:Hot Temperature; D006859:Hydrogen / Q000032:analysis; D008697:Methane / Q000032:analysis; D012275:Oryza / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry*; D013997:Time Factors; D014934:Wood / Q000737:chemistry
D005740:Gases; D002245:Carbon Dioxide; D002248:Carbon Monoxide; D006859:Hydrogen; D008697:Methane; D010100:Oxygen