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Exploration of the gasification of Spirulina algae in supercritical water
被引:40
作者:
Miller, Andrew
[1
]
Hendry, Doug
[1
]
Wilkinson, Nikolas
[2
]
Venkitasamy, Chandrasekar
[2
]
Jacoby, William
[1
,2
]
机构:
[1] Univ Missouri, Dept Chem Engn, Columbia, MO 65211 USA
[2] Univ Missouri, Biol Engn Dept, Columbia, MO USA
关键词:
Supercritical water gasification;
Algae;
Plug flow;
Reaction rate;
BIOMASS GASIFICATION;
HYDROGEN-PRODUCTION;
MODEL COMPOUNDS;
GLUCOSE;
MICROALGAE;
D O I:
10.1016/j.biortech.2012.05.005
中图分类号:
S2 [农业工程];
学科分类号:
0828 ;
摘要:
This study presents non-catalytic gasification of Spirulina algae in supercritical water using a plug flow reactor and a mechanism for feeding solid carbon streams into high pressure (>25 MPa) environments. A 2(///)(3-1) factorial experimental design explored the effect of concentration, temperature, and residence time on gasification reactions. A positive displacement pump fed algae slurries into the reactor at a temperature range of 550-600 degrees C, and residence times between 4 and 9 s. The results indicate that algae gasify efficiently in supercritical water, highlighting the potential for a high throughput process. Additional experiments determined Arrhenius parameters of Spirulina algae. This study also presents a model of the gasification reaction using the estimated activation energy (108 Id/mol) and other Arrhenius parameters at plug flow conditions. The maximum rate of gasification under the conditions studied of 53 g/L s is much higher than previously reported. (C) 2012 Elsevier Ltd. All rights reserved.
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页码:41 / 47
页数:7
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