Biocrude yield and productivity from the hydrothermal liquefaction of marine and freshwater green macroalgae

Neveux, Nicolas; Yuen, Alexander K. L.; Jazrawi, Christopher; Magnusson, Marie; Haynes, Brian S.; Masters, Anthony F.; Montoya, Alejandro; Paul, Nicholas A.; Maschmeyer, Thomas; Nys, Rocky de

doi:10.1016/j.biortech.2013.12.083

Cited by 205 publications

(132 citation statements)

References 33 publications

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“…Algae, the microorganisms grow fastly in water, are considered as potential feedstocks for production of bio-fuels. Recently, algae have already attacted much attention [3,4]. There are different processes of bio-fuel production from algal biomass which include supercritical water gasification, bio-diesel production by solvent extraction, bio-gas production by anaerobic digestion and bio-oil production by pyrolysis.…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis of Isochrysis Microalgae With Metal Oxide Catalysts for Bio-Oil Production

Aysu

2016

Journal of the Turkish Chemical Society, Section A: Chemistry

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Pyrolysis of Isochrysis microalga was carried out in a fixed-bed reactor without and with metal oxide catalysts (CeO2, TiO2, Al2O3) for the first time at the temperatures of 450, 500 and 550 °C with a constant heating rate of 40 °C/min. The pyrolytic conditions including catalyst and temperature were studied in terms of their effects on the yields of pyrolytic products and quality. The amounts of bio-char, bio-oil, and gaseous products were calculated. The composition of the produced bio-oils was determined by Elemental analysis (EA), Fourier transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance ( 1 H NMR) and Gas chromatography/mass spectrometry (GC-MS) techniques. As a result of the pyrolysis experiments, it is shown that there have been significant effects of both catalyst and temperature on the conversion of Isochrysis microalgae into solid, liquid (bio-oil) and gas products. The highest bio-oil yield (24.30 %) including aqueous phase was obtained in the presence of TiO2 (50%) as catalyst at 500 °C. 98 different compounds were identified by GC-MS in bio-oils obtained at 500 o C. According to 1 H NMR analysis, bio-oils contained ∼60-64% aliphatic and ∼17-19% aromatic structural units. EA showed that the bio-oils contained ∼66-69% C and having 31-34 MJ/kg higher heating values.

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Section: Introductionmentioning

confidence: 99%

Pyrolysis of Isochrysis Microalgae With Metal Oxide Catalysts for Bio-Oil Production

Aysu

2016

Journal of the Turkish Chemical Society, Section A: Chemistry

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“…The nature of the process allows for feedstock with high moisture content, therefore a wide range of material can be subjected to HTL to produce bio-crude. Studies liquefying wood [15][16][17][18], forest residues [19][20][21], agricultural residues [14,16,17,20,22,23], municipal wastes [24,25], sewage sludge [26,27], manure [28,29], and algae [30][31][32][33][34][35] have been published.…”

Section: Introductionmentioning

confidence: 99%

A Review of Hydrothermal Liquefaction Bio-Crude Properties and Prospects for Upgrading to Transportation Fuels

2015

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Hydrothermal liquefaction (HTL) presents a viable route for converting a vast range of materials into liquid fuel, without the need for pre-drying. Currently, HTL studies produce bio-crude with properties that fall short of diesel or biodiesel standards. Upgrading bio-crude improves the physical and chemical properties to produce a fuel corresponding to diesel or biodiesel. Properties such as viscosity, density, heating value, oxygen, nitrogen and sulphur content, and chemical composition can be modified towards meeting fuel standards using strategies such as solvent extraction, distillation, hydrodeoxygenation and catalytic cracking. This article presents a review of the upgrading technologies available, and how they might be used to make HTL bio-crude into a transportation fuel that meets current fuel property standards.

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“…The HTL process converts complex polymers present in the biomass into simpler molecules that can be converted to bio-oils. One major limitation on the HTL process is the high ash content present on seaweed biomass, which reduces the yields an quality of the generated bio-oils, restricting their use in direct combustion or gasiication processes [93,94], so the biomass has to be pretreated to reduce the ash content. Usually, the pretreatment process is carried out with mineral acids like sulfuric acid, nitric acid, or organic acids as acetic acid and citric acid usually in a rate of 10% (w/w) between biomass and acid [56].…”

Section: Industrial Uses Of Seaweed Biomassmentioning

confidence: 99%

Metal Removal by Seaweed Biomass

Ortiz-Calderon¹,

Silva²,

Vásquez³

2017

Biomass Volume Estimation and Valorization for Energy

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Environmental metal pollution is a serious public problem, and it has become an issue leading to research in the eluent remediation area. Techniques involving biosorption processes have been found to be promising due to the low cost of nonliving biomaterials, which have the potential to adsorb metal ions from wastewaters. One of the most promising types of biomasses to be used as biosorbents is the seaweed biomass, particularly from brown algae. The biosorption capability of the seaweed biomass relies on their cell wall chemical composition, mainly composed of alginates and fucoidans, molecules with a high presence of functional groups that interact with metal ions. This book chapter focuses on the use of seaweed biomass for metal biosorption and the chemical basis underlying the process. The current state of the commercial status of biosorption technology based on seaweed biomass is presented. Examples of complementary uses of the algae biomass other than industrial wastewater cleaning processes are presented, and the potential reuse of the biomass after the biosorption focused on biofuel production is discussed.

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Biocrude yield and productivity from the hydrothermal liquefaction of marine and freshwater green macroalgae

Cited by 205 publications

References 33 publications

Pyrolysis of Isochrysis Microalgae With Metal Oxide Catalysts for Bio-Oil Production

Pyrolysis of Isochrysis Microalgae With Metal Oxide Catalysts for Bio-Oil Production

A Review of Hydrothermal Liquefaction Bio-Crude Properties and Prospects for Upgrading to Transportation Fuels

Metal Removal by Seaweed Biomass

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