Journal
ENERGY & FUELS
Volume 24, Issue 6, Pages 3639-3646Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ef100203u
Keywords
-
Categories
Funding
- National Science Foundation (NSF) Alliance for Graduate Education
- Professoriate (AGEP) Fellowship Program
- University of Michigan College of Engineering
- NSF [CBET-0755617, EFRI-0937992]
- Emerging Frontiers & Multidisciplinary Activities
- Directorate For Engineering [0937992] Funding Source: National Science Foundation
Ask authors/readers for more resources
We converted the marine microalga Nannochloropsis sp. into a crude bio-oil product and a gaseous product via hydrothermal processing from 200 to 500 degrees C and a batch holding time of 60 min. A moderate temperature or 350 degrees C led to the highest bio-oil yield of 43 wt %. We estimate the heating value of the bio-oil to be about 39 MJ kg(-1), which is comparable to that of a petroleum crude oil. The H/C and O/C ratios for the bio-oil decreased from 1.73 and 0.12, respectively, for the 200 degrees C product to 1.04 and 0.05, respectively, for the 500 degrees C product. Major bio-oil constituents include phenol and its alkylated derivatives, heterocyclic N-containing compounds. long-chain fatty acids, alkanes and alkenes, and derivatives of phytol and cholesterol. CO2 was always the most abundant gas product. H-2 was the second most abundant gas at all temperatures other than 500 degrees C. where its yield was surpassed by that of CH4. The activation energies for gas formation suggest the presence of gas-forming reactions other than steam reforming. Nearly 80% of the carbon and up to 90% of the chemical energy originally present in the microalga can be recovered as either bio-oil or gas products.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available