Single-step conversion of wet Nannochloropsis gaditana to biodiesel under subcritical methanol conditions

Weena Sitthithanaboon, Harvind K. Reddy, Tapaswy Muppaneni, Sundaravadivelnathan Ponnusamy, Vittaya Punsuvon, Francisco Holguim, Barry Dungan, Shuguang Deng

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

A single-step process for a direct conversion of wet algal biomass containing about 80% of water into biodiesel under subcritical methanol conditions is developed and presented in this work. This process may have energetic advantages with high free fatty acid (FFA) and water contents as the feedstock. At elevated temperatures, water hydrolysis and FFA esterification can simultaneously occur in a subcritical state. The influences of process parameters including reaction temperature (150-225 °C), reaction time (15-120 min) and methanol to wet biomass (vol./wt.) ratio (3:1-8:1) were investigated. The optimal conditions for this process are reported as: methanol to wet biomass (vol./wt.) ratio of around 6:1, temperature and time of about 225 °C, and reaction time of 90 min. The fatty acid methyl esters (FAMEs) were analyzed with GC-MS, FT-IR and thermogravimetric (TGA). This process does not require a catalyst and any drying pre-treatment steps. Thus, the process is cost-saving and environmental friendly for renewable biodiesel production.

Original languageEnglish (US)
Pages (from-to)253-259
Number of pages7
JournalFuel
Volume147
DOIs
StatePublished - May 1 2015

Keywords

  • Biodiesel
  • Fatty acid methyl ester
  • Nannochloropsis gaditana
  • Subcritical methanol condition
  • Wet algae

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Organic Chemistry

Fingerprint Dive into the research topics of 'Single-step conversion of wet Nannochloropsis gaditana to biodiesel under subcritical methanol conditions'. Together they form a unique fingerprint.

  • Cite this

    Sitthithanaboon, W., Reddy, H. K., Muppaneni, T., Ponnusamy, S., Punsuvon, V., Holguim, F., Dungan, B., & Deng, S. (2015). Single-step conversion of wet Nannochloropsis gaditana to biodiesel under subcritical methanol conditions. Fuel, 147, 253-259. https://doi.org/10.1016/j.fuel.2015.01.051