Hydrothermal liquefaction of Gracilaria gracilis and Cladophora glomerata macro-algae for biocrude production

Mehran Parsa; Hamoon Jalilzadeh; Maryam Pazoki; Reza Ghasemzadeh; MohammadAli Abduli

doi:10.1016/j.biortech.2017.10.059

Hydrothermal liquefaction of Gracilaria gracilis and Cladophora glomerata macro-algae for biocrude production

Bioresour Technol. 2018 Feb:250:26-34. doi: 10.1016/j.biortech.2017.10.059. Epub 2017 Oct 16.

Authors

Mehran Parsa¹, Hamoon Jalilzadeh², Maryam Pazoki³, Reza Ghasemzadeh⁴, MohammadAli Abduli⁵

Affiliations

¹ Solid Waste Engineering Group, Department of Environmental Engineering, Graduated Faculty of Environment, University of Tehran, Tehran, Iran. Electronic address: Mehran.Parsa@ut.ac.ir.
² Department of Environmental Engineering, Graduate Faculty of Environment, University of Tehran, Tehran, Iran. Electronic address: hjalilzadeh@ut.ac.ir.
³ Department of Environmental Engineering, Graduate Faculty of Environment, University of Tehran, Tehran, Iran. Electronic address: mpazoki@ut.ac.ir.
⁴ Department of Environmental Engineering, Graduate Faculty of Environment, University of Tehran, Tehran, Iran. Electronic address: reza_ghasemzade@ut.ac.ir.
⁵ Department of Environmental Engineering, Graduate Faculty of Environment, University of Tehran, Tehran, Iran. Electronic address: mabdoli@ut.ac.ir.

PMID: 29153647
DOI: 10.1016/j.biortech.2017.10.059

Abstract

The potential of Gracilaria gracilis (G. gracilis) and Cladophora glomerata (C. glomerata) macro-algae species harvested from Caspian Sea for biocrude oil production under Hydrothermal Liquefaction (HTL) reaction at 350 °C and 15 min has been investigated. Furthermore, the effect of using recycled aqueous phase as the HTL reaction solvent was studied. The biocrude yield for G. gracilis and C. glomerata was 15.7 and 16.9 wt%, respectively with higher heating value (HHV) of 36.01 and 33.06 MJ/kg. The sources of each existing component in bio-oil were identified by GC-MS based on their suggested reaction pathways. Moreover, after two series of aqueous solution recycling, experiments showed that the bio-oil yield significantly increased compared with the initial condition. This increasing directly relates with recovery of carbon content from the aqueous solution residue.

Keywords: Biocrude; Cladophora glomerata; Gracilaria gracilis; Hydrothermal liquefaction (HTL); Macro-algae.

MeSH terms

Biofuels*
Gracilaria*
Plant Oils
Polyphenols
Temperature
Water

Substances

Bio-Oil
Biofuels
Plant Oils
Polyphenols
Water