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

Christensen, Earl D.; Alleman, Teresa; McCormick, Robert L.

doi:10.1016/j.fuproc.2018.04.011

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

Journal Article · Wed Apr 25 00:00:00 EDT 2018 · Fuel Processing Technology

DOI:https://doi.org/10.1016/j.fuproc.2018.04.011· OSTI ID:1461852

Christensen, Earl D. ^[1]; ^[1]; McCormick, Robert L. ^[1]

National Renewable Energy Lab. (NREL), Golden, CO (United States)

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).

View Accepted Manuscript (DOE)

Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1461852

Alternate ID(s):: OSTI ID: 1548450

Report Number(s):: NREL/JA--5400-70563

Journal Information:: Fuel Processing Technology, Journal Name: Fuel Processing Technology Journal Issue: C Vol. 177; ISSN 0378-3820

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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25 ENERGY STORAGE
33 ADVANCED PROPULSION SYSTEMS
antioxidant
biodiesel
oxidation stability
renewable fuel
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Re-additization of commercial biodiesel blends during long-term storage

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