Valorization of hazelnut shell waste in hot compressed water

Gözaydın, Gökalp; Yuksel, Asli

doi:10.1016/j.fuproc.2017.05.034

Cited by 13 publications

(20 citation statements)

References 54 publications

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“…Besides, TOC conversion was also determined solid residues and the results are given in Table 3. TOC conversion was found as 49.71% at 280 • C and 60 min (Gozaydin and Yuksel, 2017). In literature (Girisuta, 2007;Toor et al, 2011) various types of acids were described to decompose different biomasses in subcritical water.…”

Section: Liquefaction Of Cellulose and Waste Hazelnut Shellmentioning

confidence: 93%

“…Experiments related to liquefaction of cellulose and hazelnut shell waste were performed in a Parr Instrument Company, USA branded 316 stainless steel autoclave (300 mL). The reactor equipped with gas inlet and outlet valves, liquid sampling valve, pressure gage, safety rupture disc, magnetic-driven impeller, internal thermocouple, and cooling loop (Gozaydin and Yuksel, 2017). Firstly, 4 g of biomass feedstock (cellulose, hazelnut shell waste) was placed into the reactor and then, 100 ml of deionized water was added to adjust the volume.…”

Section: Methodsmentioning

confidence: 99%

“…The temperature and internal pressure rose until reaching desired reaction temperature and then, the reaction was started for a certain reaction time. At the end of reaction time, the heater was turned off and the system was cooled to 40 • C to collect the final products (Gozaydin and Yuksel, 2017).…”

Section: Methodsmentioning

confidence: 99%

“…Moisture and ash contents of hazelnut shell (biomass) were determined by Thermal Gravimetric Analysis (TGA-51, Shimadzu, Japan). Hazelnut shell contains cellulose, hemicellulose and lignin and their amount were determined by Van Soest Method (Gozaydin and Yuksel, 2017).…”

Section: Product Analysismentioning

confidence: 99%

“…During hazelnut processing, waste hazelnut shells form in large quantities and they are mainly used for heating (Guney, 2013). Hence, waste hazelnut shells could utilize to produce value-added chemicals so that they could not only be a natural alternative resource but also contribute in value gaining (Gozaydin and Yuksel, 2017). In literature, there are several researches about the natural biomass decomposition in subcritical water.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Conversion of Biomass to Organic Acids by Liquefaction Reactions Under Subcritical Conditions

Özşen

2020

Front. Chem.

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Recently, liquefaction of biomass in subcritical water to convert it into value-added substances has been broadly attracting attention. However, there is a gap in literature about the levulinic acid, which is a high worth substance, production from biomass using subcritical water. As a green chemistry approach, decomposition of biomass could be Yüksel Özşen SubBio2Chem reaction pathway of cellulose was proposed. The significance of the interaction indicated that, applied voltage had major impact on cellulose hydrolysis. Maximum cellulose conversion (82%) was achieved at 230 • C and 180 min of reaction time in 25 mM of H 2 SO 4. Application of 8.0 V of applied voltage to the reaction medium at reaction temperature of 230 • C increased the TOC conversion (50.3%) with acid concentration of 25 mM in comparison with current-free experiments. Thus, the idea of electrochemically generated acid layer due to the dissociation of water around anode is supported. As future perspective, the output of the study gave an idea about converting cellulose and various biomass wastes, which may have high cellulose, content and led the way in obtaining valuable chemicals from no utilized real biomass sources such as hazelnut shell waste. The studies with other biomasses are undergoing.

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Section: Liquefaction Of Cellulose and Waste Hazelnut Shellmentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Product Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Conversion of Biomass to Organic Acids by Liquefaction Reactions Under Subcritical Conditions

Özşen

2020

Front. Chem.

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Sono‐exfoliated graphene‐like activated carbon from hazelnut shells for flexible supercapacitors

Reddygunta

Callander

Šiller

et al. 2022

Intl J of Energy Research

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Currently, more than 80% of commercial supercapacitors utilize chemically synthesized carbon nanomaterials which are expensive and necessitates non-renewable resources. Employing renewable, environment friendly and naturally available biomass feedstock as precursor for producing carbon materials is a low-cost and sustainable way for designing the electrodes of supercapacitors. In the present study, high surface area hierarchical porous multilayered graphene-like carbon is obtained via room temperature sono-exfoliation of the activated carbon synthesized via simple and environmentally friendly hydrothermal carbonization and potassium bicarbonate activation of waste hazelnut shells as the precursor. The high surface area graphene-like carbon showed excellent electrochemical performance with specific capacitance of 320.9 F g À1 at 0.2 A g À1 current density and exceptional capacitance retention of 77.8% at 2 A g À1 current density after 10 000 cycles in 1 M Na 2 SO 4 electrolyte. Moreover, flexible supercapacitors fabricated using sonoexfoliated graphene-like activated carbon coated stainless steel mesh electrodes and biopolymer gel electrolyte exhibits an outstanding energy density of 38.7 W h kg À1 and power density of 198.4 W kg À1 . These results show that mechanically exfoliated graphene-like activated carbon derived from hazelnut shells exhibit superior electrochemical performance that can compete with other activated carbon materials used in energy storage devices for real time applications.

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Phosphorylated hazelnut shell waste for sustainable lithium recovery application as biosorbent

Recepoğlu

Yuksel

2021

Cellulose

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Hazelnut shell waste was phosphorylated to develop a novel biosorbent based on natural renewable resource for the recovery of lithium from aqueous solution. For the synthesized biosorbent, the surface morphology and mapping by SEM-EDS, chemical properties by FTIR, elemental analysis by XPS, specific surface area by BET, crystallinity by XRD and thermal properties by TGA were elucidated elaborately. The influence of biosorbent dosage, initial concentration, temperature, contact time, pH and coexisting ions were investigated. The equilibrium sorption capacity reached 6.03 mg/g under optimal conditions (i.e., biosorbent dosage of 12.0 g/L, initial Li concentration of 100 mg/L, pH value of 5.8, sorption temperature of 25 °C, and sorption time of 6 min). According to the sorption behavior of the phosphorylated hazelnut shell waste the Freundlich model proved to be more suitable than the Langmuir model indicating maximum sorption capacity as

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Valorization of hazelnut shell waste in hot compressed water

Cited by 13 publications

References 54 publications

Conversion of Biomass to Organic Acids by Liquefaction Reactions Under Subcritical Conditions

Conversion of Biomass to Organic Acids by Liquefaction Reactions Under Subcritical Conditions

Sono‐exfoliated graphene‐like activated carbon from hazelnut shells for flexible supercapacitors

Phosphorylated hazelnut shell waste for sustainable lithium recovery application as biosorbent

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