Effect of low-temperature catalytic hydrothermal liquefaction of Spirulina platensis

Sabariswaran Kandasamy, Bo Zhang, Zhixia He, Haitao Chen, Huan Feng, Qian Wang, Bin Wang, Veeramuthu Ashokkumar, Subramanian Siva, Narayanamoorthy Bhuvanendran and M. Krishnamoorthi

Energy, 2020, vol. 190, issue C

Abstract: In this work, the cerium oxide (CeO2) nanocatalyst was employed as a catalyst to enhance the hydrothermal liquefaction (HTL) of microalgae to bio-oil conversion. The HTL optimized parameters were obtained from response surface methodology (RSM). The Spirulina Platensis is blue-green algae were used to convert into bio-oil. The major processing method for bio-oil conversion was designed based on three key parameters, such as temperature, residence time and catalyst concentration. A remarkable enhancement of bio-oil production was observed for 0.20 g of CeO2 catalyzed HTL at 250 °C for 30 min, and around 26% of conversion was achieved which is higher than catalyst-free HTL reaction (16%). The synthetic CeO2 nanostructure was characterized using scanning electron microscopy (SEM), field emission scanning electron microscopy (FE-SEM), high-resolution transmission electron microscopy (HR-TEM), brunauer-emmett-teller surface area (BET), X-ray powder diffraction (XRD) and thermal gravimetric analysis (TGA). The chemical composition of bio-oil was analyzed by gas chromatography-mass spectrometry (GC-MS) and the functional group analysis was done using fourier transform-infra red spectroscopy (FT-IR). The obtained results clearly reveal that the major chemical constituents such as hydrocarbons (7.55%), amino acids (36.69%) and nitrogen compounds (21.58%) for the bio-oil increased during CeO2 catalyzed HTL reaction. This investigation depicts that, the CeO2 nanoparticle could be employed as a potential candidate to accelerate the bio-oil conversion through HTL at low temperature from Spirulina platensis.

Keywords: Hydrothermal liquefaction; Spirulina platensis; Low temperature catalytic HTL; Response surface methodology; Central composite design; Energy recovery (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:190:y:2020:i:c:s0360544219319310

DOI: 10.1016/j.energy.2019.116236

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