TY - JOUR
T1 - Gasification of alga Nannochloropsis sp. in supercritical water
AU - Guan, Qingqing
AU - Savage, Phillip E.
AU - Wei, Chaohai
N1 - Funding Information:
Qingqing Guan thanks Chad Huelsman for advice and assistance and the China Scholarship Council for financial support as a joint PhD student. We also acknowledge financial support from the University of Michigan College of Engineering , the National Science Foundation ( CBET-0755617 ), and the State Key Program of the National Natural Science of China (no. 21037001 ).
PY - 2012/1
Y1 - 2012/1
N2 - We report results from a systematic study of the gasification of the alga Nannochloropsis sp. in supercritical water at 450-550°C. The gaseous products were mainly H 2, CO 2, and CH 4, with lesser amounts of CO, C 2H 4, and C 2H 6. Higher temperatures, longer reaction times, higher water densities, and lower algae loadings provided higher gas yields. The algae loading strongly affected the H 2 yield, which more than tripled when the loading was reduced from 15 wt% to 1 wt%. The water density had little effect on the gas composition. The temporal variation of intermediate products indicated that some (e.g., alkanes) reacted quickly whereas others (aromatics) reacted more slowly. On the basis of this observation and the complete set of experimental results, we propose a global reaction network for algae SCWG that includes parallel primary pathways to each of these two types of intermediate products. The intermediate products then produce gases.
AB - We report results from a systematic study of the gasification of the alga Nannochloropsis sp. in supercritical water at 450-550°C. The gaseous products were mainly H 2, CO 2, and CH 4, with lesser amounts of CO, C 2H 4, and C 2H 6. Higher temperatures, longer reaction times, higher water densities, and lower algae loadings provided higher gas yields. The algae loading strongly affected the H 2 yield, which more than tripled when the loading was reduced from 15 wt% to 1 wt%. The water density had little effect on the gas composition. The temporal variation of intermediate products indicated that some (e.g., alkanes) reacted quickly whereas others (aromatics) reacted more slowly. On the basis of this observation and the complete set of experimental results, we propose a global reaction network for algae SCWG that includes parallel primary pathways to each of these two types of intermediate products. The intermediate products then produce gases.
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U2 - 10.1016/j.supflu.2011.09.007
DO - 10.1016/j.supflu.2011.09.007
M3 - Article
AN - SCOPUS:83955162892
SN - 0896-8446
VL - 61
SP - 139
EP - 145
JO - Journal of Supercritical Fluids
JF - Journal of Supercritical Fluids
ER -