Production of Liquid Biofuels from Microalgae Chlorella sp. via Catalytic Slow Pyrolysis

Bambang Sardi*, Rifa Fatwa Ningrum, Vicky Aziz Ardiansyah, Lailatul Qadariyah, Mahfud Mahfud

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


This study investigates the effects of catalyst preparation techniques on the yield and quality of liquid biofuel produced from slow catalytic pyrolysis of microalgae Chlorella sp. using various catalysts, including acid catalysts (HZSM-5) and base catalysts (activated carbon). The effects of different temperatures, catalyst loading, and reaction time on the yield and quality of liquid biofuels, including chemical composition, density, and the resulting viscosity at the optimal variable, were investigated. The results showed that slow catalytic pyrolysis using 1 wt.% activated carbon catalyst, a temperature of 550°C, and a reaction time of three hours produced a maximum yield of liquid biofuel at 50.38 wt.% with high aromatic hydrocarbons, less oxygen and acid, a density of 0.88 kg/L, and a viscosity of 5.79 cSt that satisfied specifications of biodiesel No. 2. Slow catalytic pyrolysis with a variety of catalyst types and catalyst preparation techniques affects the increase in yield and quality adjustment of liquid biofuel. The proposed technology can be further developed for commercial applications, replacing conventional diesel fuel.

Original languageEnglish
Pages (from-to)147-156
Number of pages10
JournalInternational Journal of Technology
Issue number1
Publication statusPublished - 2022


  • Activated carbon
  • Chlorella sp.
  • HZSM-5
  • Liquid biofuel
  • Slow catalytic pyrolysis


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