Assessment of BQ-9000 Biodiesel Properties for 2021

Teresa Alleman

Research output: NRELTechnical Report


This is the fifth in a series of reports documenting the quality of biodiesel from U.S. and Canadian-based producers that participate in the BQ-9000 program, the biodiesel industry voluntary quality assurance program. Participants agreed to provide monthly data on critical quality parameters for calendar year 2021. The quality data was provided to a team of experts, who removed any identifying company information and provided anonymized and randomized data to the National Renewable Energy Laboratory (NREL) for statistical analysis. The critical quality parameters analyzed were: sodium and potassium (Na+K); calcium and magnesium (Ca+Mg); phosphorus (P); flash point and alcohol control; water and sediment; cloud point; acid number; free and total glycerin; monoglycerides; sulfur; oxidation stability; and cold soak filterability test (CSFT). The data was not weighted for production volume.
Original languageAmerican English
Number of pages28
StatePublished - 2022

Bibliographical note

Produced under direction of Clean Fuels Alliance America by the National Renewable Energy Laboratory (NREL) under Cooperative Research and Development Agreement CRC-15-593

NREL Publication Number

  • NREL/TP-5400-83108


  • biodiesel
  • metals
  • quality


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