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.
引用
收藏
页码:41 / 47
页数:7
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