Investigation of the thermal behaviour of different biomasses and properties of their low- and high-temperature ashes

Reinmöller, Markus; Sieradzka, Małgorzata; Laabs, Marcel; Schreiner, Marcus; Mlonka-Mędrala, Agata; Kopia, Agnieszka; Meyer, Bernd; Magdziarz, Aneta

doi:10.1016/j.fuel.2021.121026

Cited by 19 publications

(8 citation statements)

References 55 publications

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“…The combustion indices (Table ) were also employed to compare the combustion performance. They were determined using formulas taken elsewhere . The indices were burnout ( D f ), comprehensive combustion ( S ), ignition ( D i ), and combustion stability ( H f ).…”

Section: Results and Discussionmentioning

confidence: 99%

“…During the calcination process, combustion also occurs. Thus, the combustion performance of precursors and catalyst composite materials (CCMs) plays a crucial role in establishing the catalyst’s physicochemical properties . For instance, the ashes produced when the more thermally reactive component in LBs is oxidized may prevent air from penetrating and cause the char produced by the less reactive component not to oxidize .…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the combustion performance of precursors and catalyst composite materials (CCMs) plays a crucial role in establishing the catalyst’s physicochemical properties. 20 For instance, the ashes produced when the more thermally reactive component in LBs is oxidized may prevent air from penetrating and cause the char produced by the less reactive component not to oxidize. 21 This in return slows the decomposition of organic and inorganic compounds into more catalytically active components.…”

Section: Introductionmentioning

confidence: 99%

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Catalytic Performance Investigation of Alkali and Bifunctional Catalysts Derived from Lignocellulosic Biomasses for Biodiesel Synthesis from Waste Frying Oil

Bekele,

Shibeshi,

Reshad

2024

ACS Omega

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In this study, alkali and bifunctional catalysts were synthesized for waste frying oil methyl ester (WFOME) synthesis. Coffee husk (CH) and CH blended with Eragrostis tef straw (TS) (CH−TS) lignocellulosic biomasses (LBs) were utilized during the catalysts' synthesis. The alkali catalysts were CH and CH−TS ashes, both modified by KNO 3 impregnation. They are designated as C-45 and C-Mix, respectively. Zirconia (ZrO 2 ) promoted CH ash catalysts via precipitation followed by impregnation (Bic-PP) and in situ precipitation−impregnation (Bic-Dm) were the bifunctional ones. CH and CH−TS chars were the supporting frameworks during the catalysts' composite materials (CCMs) preparation. The combustion performance of LBs and CCMs was evaluated and associated with the catalysts' physicochemical properties. Using XRD, SEM, FTIR, alkalinity, TOF, and BET surface area analysis, catalysts were characterized. The combustion performance of the LBs was in the order of TS > CH−TS > CH. Among CCMs, the highest combustion performance was for CCM-Mix (KNO 3 /(CH−TS char)) and the lowest was for CCM-45 (KNO 3 / CH char). The C-Mix catalyst was a light green powder due to the reaction between inorganic components, whereas C-45 was dark gray due to the presence of unburned char. The CCMs for bifunctional catalysts had moderate combustion performance and yielded light gray powdered catalysts containing tetragonal ZrO 2 . The optimum WFOME yields were 98.08, 97, 92.69, and 93.05 wt % for C-Mix, C-45, Bic-Dm, and Bic-PP assisted WFO transesterification, respectively. The results were obtained at a reaction temperature of 65 °C, time of 1 h, and methanol to WFO molar ratio of 15:1 using catalyst amounts of 5 and 7 wt % for the alkali and bifunctional catalysts, respectively. The greatest moisture resistance was offered by the C-Mix catalyst. The best reusability was for the C-45 catalyst. Catalysts' deactivation modes include active site leaching and poisoning.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Catalytic Performance Investigation of Alkali and Bifunctional Catalysts Derived from Lignocellulosic Biomasses for Biodiesel Synthesis from Waste Frying Oil

Bekele,

Shibeshi,

Reshad

2024

ACS Omega

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“…As the VM are removed from the chars after gasification, it is expected that the ignition temperature increases for carbonized samples in comparison to the raw biomass. The range of T i for raw biomass is 222-262 • C, while for chars it is 335-486 • C [51]. This trend indicates that char samples have lower reactivity, which is characteristic for coal [52].…”

Section: Thermogravimetric Analysis Of Combustion Properties Of Raw B...mentioning

confidence: 94%

Evaluation of Physical and Chemical Properties of Residue from Gasification of Biomass Wastes

et al. 2022

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Thermochemical conversion of biomass waste is a high potential option for increasing usage of renewable energy sources and transferring wastes into the circular economy. This work focuses on the evaluation of the energetic and adsorption properties of solid residue (char) of the gasification process. Gasification experiments of biomass wastes (wheat straw, hay and pine sawdust) were carried out in a vertical fixed bed reactor, under a CO2 atmosphere and at various temperatures (800, 900 and 1000 °C). The analysis of the energy properties of the obtained chars included elemental and thermogravimetric (TGA) analysis. TGA results indicated that the chars have properties similar to those of coal; subjected data were used to calculate key combustion parameters. As part of the analysis of adsorption properties, BET, SEM, FTIR and dynamic methanol vapor sorption tests were conducted. The specific surface area has risen from 0.42–1.91 m2/g (biomass) to 419–891 m2/g (char). FTIR spectroscopy confirmed the influence of gasification on the decomposition of characteristic chemical compounds for biomass. Methanol sorption has revealed for the 900 °C chars of pine sawdust the highest sorption capacity and its mass change was 24.15% at P/P0 = 90%. Selected chars might be an appropriate material for volatile organic compounds sorption.

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“…There are a lot of by-products during processing sunflower oil such as press cakes and oil meal, which are high-protein feeds for farm animals [16]. The standardization of biomasses is going to be a key aspect to get good quality biofuels from those residues [17] and the thermal behaviour of these materials need to be studied [18]. With regards to the condition of pre-and post-processing techniques it is suggested to implement the new construction of expellers for oil millers in order to the fatty acid compositions of sunflower oil did not significantly change [19].…”

Section: Introductionmentioning

confidence: 99%

Investigation of constructive and technological parameters of an energy-efficient screw oil press

Dotsenko,

Gorbenko,

Batsurovska

2023

IOP Conf. Ser.: Earth Environ. Sci.

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The article presents the investigation of constructive and technological parameters of an energy-efficient screw oil press. It is outlined the principle of operation of an energy-efficient screw oil press. The construction of the oil press is improved by the steam atomizer that is installed in the receiving hopper under the rifled rollers for moisture-thermal treatment with steam, which is completed with the heat exchanger, heating element, expansion tank and hydro group. Also, a steam generator connected to a steam atomizer which is embodied into the receiving hopper. It was analyzed the influence of the optimization criteria (oil yield, energy consumption and press productivity) on the efficiency of the technological process. These optimization criteria depend on the main independent factors: the length of the reception and preparation chamber, the material (sunflower pulp) moisture; the heating temperature, the screw rotation speed, the linear speed of movement of screw shaft turns. The optimal constructive and technological parameters of energy-efficient screw oil press are considered. The energy-efficient screw oil press refers to the equipment of the oil enterprises of small productivity and due to its design, it allows to use a simple technological scheme of oil pressing and to reduce the amount of energy and resources spent on the technological process in the context of use in sustainable food systems.

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Investigation of the thermal behaviour of different biomasses and properties of their low- and high-temperature ashes

Cited by 19 publications

References 55 publications

Catalytic Performance Investigation of Alkali and Bifunctional Catalysts Derived from Lignocellulosic Biomasses for Biodiesel Synthesis from Waste Frying Oil

Catalytic Performance Investigation of Alkali and Bifunctional Catalysts Derived from Lignocellulosic Biomasses for Biodiesel Synthesis from Waste Frying Oil

Evaluation of Physical and Chemical Properties of Residue from Gasification of Biomass Wastes

Investigation of constructive and technological parameters of an energy-efficient screw oil press

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