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Title: Re-additization of commercial biodiesel blends during long-term storage

Abstract

Commercial biodiesel blends were aged at 43 degrees C while monitoring stability. The oxidation stability -- or oxidation reserve expressed as Rancimat induction period (IP) -- gradually decreased from its initial value. At a predetermined IP threshold, an antioxidant was used to restore IP to the ASTM D7467 specification minimum of 6 h, referred to as re-additization. At lower IP values, the amount of antioxidant required increased significantly, and the effectiveness tended to be reduced. Once IP fell to essentially zero, the acid content increased to above the allowable limit and insoluble material was also detected. Storage life was increased relative to the as-received fuels as evidenced by longer time to produce acids. Experience in the field may vary based on storage conditions; however, these results indicate re-additization can significantly increase storage life of biodiesel blends when used with regular monitoring of IP and acid number. An assessment of the storage stability of the as-received fuels showed that the initial IP did not predict storage behavior, although fuels above the specification minimum remained stable for >12 weeks accelerated aging (1 year simulated).

Authors:
 [1]; ORCiD logo [1];  [1]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1461852
Alternate Identifier(s):
OSTI ID: 1548450
Report Number(s):
[NREL/JA-5400-70563]
[Journal ID: ISSN 0378-3820]
Grant/Contract Number:  
[AC36-08GO28308; CRD-15-593; DE347AC36-99GO10337]
Resource Type:
Accepted Manuscript
Journal Name:
Fuel Processing Technology
Additional Journal Information:
[ Journal Volume: 177; Journal Issue: C]; Journal ID: ISSN 0378-3820
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 33 ADVANCED PROPULSION SYSTEMS; renewable fuel; biodiesel; oxidation stability; storage stability; antioxidant

Citation Formats

Christensen, Earl D., Alleman, Teresa, and McCormick, Robert L. Re-additization of commercial biodiesel blends during long-term storage. United States: N. p., 2018. Web. doi:10.1016/j.fuproc.2018.04.011.
Christensen, Earl D., Alleman, Teresa, & McCormick, Robert L. Re-additization of commercial biodiesel blends during long-term storage. United States. doi:10.1016/j.fuproc.2018.04.011.
Christensen, Earl D., Alleman, Teresa, and McCormick, Robert L. Wed . "Re-additization of commercial biodiesel blends during long-term storage". United States. doi:10.1016/j.fuproc.2018.04.011. https://www.osti.gov/servlets/purl/1461852.
@article{osti_1461852,
title = {Re-additization of commercial biodiesel blends during long-term storage},
author = {Christensen, Earl D. and Alleman, Teresa and McCormick, Robert L.},
abstractNote = {Commercial biodiesel blends were aged at 43 degrees C while monitoring stability. The oxidation stability -- or oxidation reserve expressed as Rancimat induction period (IP) -- gradually decreased from its initial value. At a predetermined IP threshold, an antioxidant was used to restore IP to the ASTM D7467 specification minimum of 6 h, referred to as re-additization. At lower IP values, the amount of antioxidant required increased significantly, and the effectiveness tended to be reduced. Once IP fell to essentially zero, the acid content increased to above the allowable limit and insoluble material was also detected. Storage life was increased relative to the as-received fuels as evidenced by longer time to produce acids. Experience in the field may vary based on storage conditions; however, these results indicate re-additization can significantly increase storage life of biodiesel blends when used with regular monitoring of IP and acid number. An assessment of the storage stability of the as-received fuels showed that the initial IP did not predict storage behavior, although fuels above the specification minimum remained stable for >12 weeks accelerated aging (1 year simulated).},
doi = {10.1016/j.fuproc.2018.04.011},
journal = {Fuel Processing Technology},
number = [C],
volume = [177],
place = {United States},
year = {2018},
month = {4}
}

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