Concomitant extraction of bio-oil and value added polysaccharides from Chlorella sorokiniana using a unique sequential hydrothermal extraction technology

Chakraborty, Mrityunjoy; Miao, Chao; McDonald, Armando G.; Chen, Shulin

doi:10.1016/j.fuel.2011.10.055

Cited by 109 publications

(53 citation statements)

References 40 publications

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“…The weak peaks in the 1238 -1450 cm -1 region are due to the presence of C-O bending vibrations followed by C-H bending vibrations, further indicating the presence of a minor amount of esters (9,10). In the spectrum the region of CO2 from the atmosphere is not presented.…”

mentioning

confidence: 93%

Characterisation Of Polysacharides And Lipids From Selected Green Algae Species By FTIR-ATR Spectroscopy

Bartošová

Blinová

Gerulová

2015

Research Papers Faculty of Materials Science and Technology Slovak University of Technology

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Fourier transform infrared (FTIR) spectroscopy was used in this study to identify and determine spectral features of Chromochloris zofingiensis (Dönz) Fucíková et L.A.Lewis Gottingen, Germany), Acutodesmus obliguus (Turpin) Hegewald Gottingen, Germany) and Chlorella sorokiniana (K. Brandt) Pröschold et Gottingen, Germany). Polysaccharides and lipids from these three algae species were determined using Fourier Transformed Infrared Spectroscopy (FTIR) with ATR accessory with diamante crystal in spectral range from 400 -4000 cm -1 and resolution 4.

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confidence: 93%

Characterisation Of Polysacharides And Lipids From Selected Green Algae Species By FTIR-ATR Spectroscopy

Bartošová

Blinová

Gerulová

2015

Research Papers Faculty of Materials Science and Technology Slovak University of Technology

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“…SCWG of biomass has the advantage of producing a product gas at high pressure, reducing further compression costs, and carbon dioxide can be easily separated because it is much more soluble in water at high pressure compared to hydrogen. In terms of an algal biorefinery -a concept discussed by recent studies (Chakraborty et al, 2012;Alba et al, 2012) -the captured carbon dioxide can be used for microalgal cultivation and the hydrogen for upgrading the algal oil. In addition, the clean/sterile process water from SCWG which is rich in nutrients can be recycled along with the carbon dioxide for microalgal cultivation (Cherad et al, 2013).…”

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confidence: 99%

A parametric study on supercritical water gasification of Laminaria hyperborea : A carbohydrate-rich macroalga

Cherad

Onwudili

Williams

et al. 2014

Bioresource Technology

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The potential of supercritical water gasification (SCWG) of macroalgae for hydrogen and methane production has been investigated in view of the growing interest in a future macroalgae biorefinery concept. The compositions of syngas from the catalytic SCWG of Laminaria hyperborea under varying parameters including catalyst loading, feed concentration, hold time and temperature have been investigated. Their effects on gas yields, gasification efficiency and energy recovery are presented. Results show that the carbon gasification efficiencies increased with reaction temperature, reaction hold time and catalyst loading but decreased with increasing feed concentrations. In addition, the selectivity towards hydrogen and/or methane production from the SCWG tests could be controlled by the combination of catalysts and varying reaction conditions. For instance, Ru/Al 2 O 3 gave highest carbon conversion and highest methane yield of up to 11 mol/kg, while NaOH produced highest hydrogen yield of nearly 30 mol/kg under certain gasification conditions. These arise from increased land use for growing biomass for fuel which leads to competition with arable land for food crops. As such, biofuels production is shifting to non-food sources -lignocellulosic biomass -but these still require large arable areas as well as sufficient quantities of water and fertilisers to grow.The utilisation of macroalgae as a raw material for energy production compared to terrestrial biomass is appealing due to a number of factors. Macroalgae has a faster growing rate due to no water limitations (Gellenbeck and Chapman, 1983) and a lesser effect on temperature variation. It also has a higher photosynthetic efficiency of 6-8% (FAO, 1997) compared to 1.8-2.2% for terrestrial biomass and a higher productivity than that of terrestrial crops. Cultivated macroalgae (e.g. brown seaweed) demonstrate a productivity 6.5 times the maximum projected yield for sugarcane on an aerial basis (Gao and Mckinley, 1994). However, the feasibility of production of macroalgae for energy production, in a scale similar to terrestrial biomass has thrown up some uncertainties relating to where and how it will be produced and the economics of its production and subsequent conversion to fuels (Elliott, 2008).Despite macroalgae being extensively grown and used as food in Asiatic countries, as well as a source of chemicals, the fuel from algae concept does not face the same challenges compared to first and second generation biofuels in terms of food production and requirement of large areas of land, water and fertilisers.Page 3 of 28The carbohydrates in macroalgae have potential for producing biofuels and while conversion has focused on biogas production by anaerobic digestion (Matsui and Koike, 2010), recent work has focused on utilising the laminarin and mannitol for bioethanol production by fermentation (Borines et al., 2013;Yeon et al., 2011). Thermochemical conversion routes like direct combustion, pyrolysis, gasification and liquefaction have received less attention due to ...

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“…At higher processing temperatures these compounds start degrading or converting into other product fractions due to secondary and tertiary reactions. A Typical optimum point for the extraction of polysaccharides is around 160 o C [50]. Similar to the extraction of lipids, polysaccharides from algal biomass can be extracted at lower temperatures, and the remaining biomass can be used to produce biocrude oil.…”

Section: Subcritical Water Processing Of Wet Algal Biomass To Producementioning

confidence: 99%

Sub and Supercritical Fluid Technologies for the Production of Renewable (Bio) Transportation Fuels

Reddy¹,

Muppaneni²,

Deng³

2015

Biofuels - Status and Perspective

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Concomitant extraction of bio-oil and value added polysaccharides from Chlorella sorokiniana using a unique sequential hydrothermal extraction technology

Cited by 109 publications

References 40 publications

Characterisation Of Polysacharides And Lipids From Selected Green Algae Species By FTIR-ATR Spectroscopy

Characterisation Of Polysacharides And Lipids From Selected Green Algae Species By FTIR-ATR Spectroscopy

A parametric study on supercritical water gasification of Laminaria hyperborea : A carbohydrate-rich macroalga

Sub and Supercritical Fluid Technologies for the Production of Renewable (Bio) Transportation Fuels

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