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Title: Bleaching and Hydroprocessing of Algal Biomass-Derived Lipids to Produce Renewable Diesel Fuel

Algal lipids represent a promising feedstock for production of renewable diesel, but there is little information available regarding the integration of pretreatment, extraction, and catalytic upgrading steps. In this work, we examined oil bleaching by two methods and the effects of bleaching on oil deoxygenation over Pd/C and hydroisomerization over Pt/SAPO-11 catalysts. The raw oil was completely deoxygenated and 90% denitrogenated after dilution to 25 wt % in hexanes. The bleaching operations (using either a polar adsorbent or concentrated H 3PO 4) removed 85-90% of the nitrogen and led to 95-99% nitrogen removal after deoxygenation. Oil processability was also improved by bleaching. Here, the bulk chemistry of the deoxygenation and isomerization was not strongly affected by bleaching, as post-isomerization products with cloud points less than -10 °C and boiling ranges within or close to specification for No. 2 diesel fuel were obtained through 10 h time on stream with or without bleaching.
Authors:
ORCiD logo [1] ;  [1] ; ORCiD logo [1] ;  [1] ;  [1] ;  [1] ; ORCiD logo [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Report Number(s):
NREL/JA-5100-70186
Journal ID: ISSN 0887-0624
Grant/Contract Number:
AC36-08GO28308
Type:
Accepted Manuscript
Journal Name:
Energy and Fuels
Additional Journal Information:
Journal Volume: 31; Journal Issue: 10; Journal ID: ISSN 0887-0624
Publisher:
American Chemical Society (ACS)
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Bioenergy Technologies Office (EE-3B)
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; algal lipids; feedstocks; diesel
OSTI Identifier:
1395094

Kruger, Jacob S., Christensen, Earl D., Dong, Tao, Van Wychen, Stefanie, Fioroni, Gina M., Pienkos, Philip T., and McCormick, Robert L.. Bleaching and Hydroprocessing of Algal Biomass-Derived Lipids to Produce Renewable Diesel Fuel. United States: N. p., Web. doi:10.1021/acs.energyfuels.7b01867.
Kruger, Jacob S., Christensen, Earl D., Dong, Tao, Van Wychen, Stefanie, Fioroni, Gina M., Pienkos, Philip T., & McCormick, Robert L.. Bleaching and Hydroprocessing of Algal Biomass-Derived Lipids to Produce Renewable Diesel Fuel. United States. doi:10.1021/acs.energyfuels.7b01867.
Kruger, Jacob S., Christensen, Earl D., Dong, Tao, Van Wychen, Stefanie, Fioroni, Gina M., Pienkos, Philip T., and McCormick, Robert L.. 2017. "Bleaching and Hydroprocessing of Algal Biomass-Derived Lipids to Produce Renewable Diesel Fuel". United States. doi:10.1021/acs.energyfuels.7b01867. https://www.osti.gov/servlets/purl/1395094.
@article{osti_1395094,
title = {Bleaching and Hydroprocessing of Algal Biomass-Derived Lipids to Produce Renewable Diesel Fuel},
author = {Kruger, Jacob S. and Christensen, Earl D. and Dong, Tao and Van Wychen, Stefanie and Fioroni, Gina M. and Pienkos, Philip T. and McCormick, Robert L.},
abstractNote = {Algal lipids represent a promising feedstock for production of renewable diesel, but there is little information available regarding the integration of pretreatment, extraction, and catalytic upgrading steps. In this work, we examined oil bleaching by two methods and the effects of bleaching on oil deoxygenation over Pd/C and hydroisomerization over Pt/SAPO-11 catalysts. The raw oil was completely deoxygenated and 90% denitrogenated after dilution to 25 wt % in hexanes. The bleaching operations (using either a polar adsorbent or concentrated H3PO4) removed 85-90% of the nitrogen and led to 95-99% nitrogen removal after deoxygenation. Oil processability was also improved by bleaching. Here, the bulk chemistry of the deoxygenation and isomerization was not strongly affected by bleaching, as post-isomerization products with cloud points less than -10 °C and boiling ranges within or close to specification for No. 2 diesel fuel were obtained through 10 h time on stream with or without bleaching.},
doi = {10.1021/acs.energyfuels.7b01867},
journal = {Energy and Fuels},
number = 10,
volume = 31,
place = {United States},
year = {2017},
month = {8}
}