Nannochloropsis algae pyrolysis with ceria-based catalysts for production of high-quality bio-oils

Aysu, Tevfik; Sanna, Aimaro

doi:10.1016/j.biortech.2015.07.027

Cited by 101 publications

(44 citation statements)

References 36 publications

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“…S1-c) catalyst shows peaks for cubic magnesium oxide (MgO) crystal at 2h scale = 37.00°, 43.00°, 62.30°, and 78.50°. These results were consistent with those previously reported in literature (Qiao et al, 2009;Hernández-Enríquez et al, 2012;Aysu and Sanna, 2015).…”

Section: Resultssupporting

confidence: 96%

“…Surface area and pore volume were decreased, while pore size was increased slightly. Surface areas of Ce/Al 2 O 3 , NiCe/Al 2 O 3 , and MgCe/Al 2 O 3 were found to be 55.1, 60.2, and 49.6 m 2 /g, respectively (Aysu and Sanna, 2015). The X-ray diffraction patterns of the prepared catalysts with Al 2 O 3 support are shown in the Supplementary data ( Fig.…”

Section: Resultsmentioning

confidence: 96%

“…Ceria containing catalysts (Ce/Al 2 O 3 , NiCe/Al 2 O 3 , MgCe/Al 2 O 3 ) were prepared by incipient wet impregnation method with Ce (NO 3 ) 3 Â 6H 2 O, Mg(NO 3 ) 2 Â 6H 2 O, Ni(NO 3 ) 2 Â 6H 2 O as precursors using alumina support. The preparation method has been previously described (Aysu and Sanna, 2015). The Ce/Al 2 O 3 catalyst preparation was carried out by stirring cerium (III) nitrate solution and alumina support at 300 rpm for 3 h at 80°C.…”

Section: Catalyst Preparation and Characterisationmentioning

confidence: 99%

“…The pyrolysis experiments of T. weissflogii and its model compounds were performed using a fixed-bed reactor (Aysu and Sanna, 2015). The biomass sample was dried at 110°C overnight before pyrolysis runs.…”

Section: Pyrolysis Experimentsmentioning

confidence: 99%

“…In our previous study (Aysu and Sanna, 2015), we have evaluated the influence of ceria based alumina and zirconia supported catalysts on pyrolysis product yields and bio-oil properties of relatively high lipid containing alga, Nannochloropsis. However, there is no comparative study regarding the effect of ceria based catalysts on pyrolysis of low lipid algae such as Thalassiosira weissflogii and a lack of studies on the effect of ceria catalysts on microalgae model compounds pyrolysis.…”

Section: Introductionmentioning

confidence: 99%

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Ceria promoted deoxygenation and denitrogenation of Thalassiosira weissflogii and its model compounds by catalytic in-situ pyrolysis

Aysu

Maroto‐Valer

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2016

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Section: Resultssupporting

confidence: 96%

Section: Resultsmentioning

confidence: 96%

Section: Catalyst Preparation and Characterisationmentioning

confidence: 99%

Section: Pyrolysis Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ceria promoted deoxygenation and denitrogenation of Thalassiosira weissflogii and its model compounds by catalytic in-situ pyrolysis

Aysu

Maroto‐Valer

Sanna

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Bioresource Technology

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Current Advancements in Biofuel Production from Microalgae: Harvesting and Conversion Technologies

et al. 2023

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The objective of this review is to interpret the usage of alternative renewable systems that is imperative for future developments on a global industrial scale. Microalgae have appeared as the most realistic source for biofuel generation due to the accumulation of lipids in most of the strains with rapid biomass expansion and greater photosynthetic efficiency than land plants. Microalgal‐derived feedstocks have a broad range of commercial advantages and can be used as promising renewable fuel substitutes with zero net CO2 emission. Important facets of algal‐based biofuel production, growing and harvesting techniques, approaches to thermochemical conversion, synthesis of commodities with added value, and recent breakthroughs in the field of synthetic biology for fuel production are covered.

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Pyrolysis of microalgae biomass over carbonate catalysts

Ferreira

Dias

2020

J of Chemical Tech & Biotech

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Microalgae are seen as potential biomass to be used in a biorefinery concept. Several technologies can be used to convert microalgal biomass, but pyrolysis is viewed as a unique pathway to obtain valuable chemicals distributed in three phases: liquid (bio-oil), gas (bio-gas) and solid (bio-char). The liquid phase, bio-oil, usually presents higher heating value than raw biomass, but acidity and oxygen content are major drawbacks. In situ catalyzed pyrolysis can help to decrease the oxygen content and acidity of pyrolytic bio-oils. Chlorella vulgaris and Scenedesmus obliquus were pyrolyzed in a fixed-bed reactor using commercial carbonate catalysts (Li 2 CO 3 , Na 2 CO 3 , K 2 CO 3 , MgCO 3 , SrCO 3 and MnCO 3). The catalysis pyrolysis temperature (375°C) was selected from thermal degradation profiles obtained using thermogravimetry under nitrogen flow and corresponds to the maximum degradation rate for both microalgae. In spite of similar volatile and fixed carbon contents, microalgae performed differentially during pyrolysis mainly due to the different contents of carbohydrates, oils and proteins. Chlorella vulgaris and Scenedesmus obliquus showed bio-oil yield in the range 26-38 and 28-50 wt%, respectively. Only sodium carbonate was able to decrease the bio-char yield, confirming that carbonate catalysts prompt simultaneously gasification and carbonization reactions. Fourier transform infrared spectra of produced bio-oils showed a net decrease of acidity, associated with carbonyl species when carbonate catalysts were used. Bio-char morphology, for both microalgae, showed evidence of melting and resolidification of cell structures, which might be due to the lower melting points of the pyrolysis products obtained from proteins and lipids.

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Nannochloropsis algae pyrolysis with ceria-based catalysts for production of high-quality bio-oils

Cited by 101 publications

References 36 publications

Ceria promoted deoxygenation and denitrogenation of Thalassiosira weissflogii and its model compounds by catalytic in-situ pyrolysis

Ceria promoted deoxygenation and denitrogenation of Thalassiosira weissflogii and its model compounds by catalytic in-situ pyrolysis

Current Advancements in Biofuel Production from Microalgae: Harvesting and Conversion Technologies

Pyrolysis of microalgae biomass over carbonate catalysts

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