Laboratory studies on the influence of biomass particle size on pyrolysis and combustion using TG GC/MS

Mlonka-Mędrala, Agata; Magdziarz, Aneta; Dziok, Tadeusz; Sieradzka, Małgorzata; Nowak, Wojciech

doi:10.1016/j.fuel.2019.04.091

Cited by 71 publications

(49 citation statements)

References 40 publications

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“…As grains of various types of cereals are feedstock materials for malts, this could be considered as a material relatively close to the spent grain. Finally, the increase in HHV of material, after hydrothermal carbonization, is generally accepted trend, confirmed for various different types of feedstocks [67,70]. As could be reasonably expected from HTC process, carbonization resulted in increased C content and decreased O content, which is rather typical for this process [47,71,72].…”

Section: Resultssupporting

confidence: 67%

Section: Resultsmentioning

confidence: 54%

“…More research is needed to confirm this hypothesis. Particle size can have a significant influence on the pyrolysis process [70]. Kinetic data is only relevant for small enough particles, where heat transfer becomes irrelevant [84].…”

Section: Resultsmentioning

confidence: 99%

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HTC of Wet Residues of the Brewing Process: Comprehensive Characterization of Produced Beer, Spent Grain and Valorized Residues

et al. 2020

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Steady consumption of beer results in a steady output of residues, i.e., brewer's spent grain (BSG). Its valorization, using hydrothermal carbonization (HTC) seems sensible. However, a significant knowledge gap regarding the variability of this residue and its influence on the valorization process and its potential use in biorefineries exists. This study attempted to fill this gap by characterization of BSG in conjunction with the main product (beer), taking into accounts details of the brewing process. Moreover, different methods to assess the performance of HTC were investigated. Overall, the differences in terms of the fuel properties of both types of spent grain were much less stark, in comparison to the differences between the respective beers. The use of HTC as a pretreatment of BSG for subsequent use as a biorefinery feedstock can be considered beneficial. HTC was helpful in uniformization and improvement of the fuel properties. A significant decrease in the oxygen content and O/C ratio and improved grindability was achieved. The Weber method proved to be feasible for HTC productivity assessment for commercial installations, giving satisfactory results for most of the cases, contrary to traditional ash tracer method, which resulted in significant overestimations of the mass yield.However, for craft breweries located in big cities, disposal becomes more problematic [3]. There are also attempts to enrich food products with spent grains. Thus far, there have been trials with sausages [4] and bread [5]. However, consumers reported that such products represent a fiber aftertaste [6]. However, this is limited only to the relatively close vicinity of a brewery, due to relatively high moisture content, that could range between 70% up to 78% 70% [7][8][9]. Biological activity of these residues makes long term storage difficult. The literature reports ongoing work on various new ways of using BSG, including extraction of polyphenols [10,11], other anti-oxidants [12,13], functional cardioprotective lipids for pharmaceutic use [14], proteins [15], fodder for edible insects [16], material for disposable trays [17], natural rubber modifier [18], as well as feedstock for production of pigments [19] and biochar, for subsequent use as soil amendment [20] or sustainable material for electrodes [21].The potential use of this residue as a fuel has been suggested by several authors so far [7][8][9]22,23]. The relatively high initial moisture content of spent grain makes hydrothermal valorization techniques the most sensible choice [8,9]. Hydrothermal carbonization (HTC), also known as wet torrefaction, is a valorization process suitable for a range of low-quality solid biomass, especially with high initial moisture content [24,25]. Process temperature, reported in the literature, usually ranges between 180 • C and 260 • C [25][26][27][28][29][30]. As the process takes place in subcritical water, pressure has to be higher than saturation pressure of water for specific temperature [25][26][27][28][29][30]. In these conditions wa...

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Section: Resultssupporting

confidence: 67%

Section: Resultsmentioning

confidence: 54%

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HTC of Wet Residues of the Brewing Process: Comprehensive Characterization of Produced Beer, Spent Grain and Valorized Residues

et al. 2020

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“…The carrier gas is high purity helium gas [10], 1 ml/min. MS: the mass range detected by the MS program is 30-600 amu, the voltage is 70 ev, the ion source and four stage temperature are set at 230 ℃ and 150 ℃ [11][12][13][14][15][16][17][18][19][20][21].…”

Section: Sample Preparationmentioning

confidence: 99%

Natural and pyrolysis molecule of Cotoneaster zabelii Schneid

et al. 2020

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Original scientific paper https://doi.org/10.2298/TSCI190703035YCotoneaster zabelii Schneid is a unique wood biological resource in China, but its natural ingredients are not used effectively. In this paper, ethanol and phenyl alcohol were used to study the leaves and branches of Cotoneaster zabelii Schneid. Gas chromatographic/mass spectrometry (GC-MS) analysis showed that Cotoneaster zabelii Schneid was rich in chemical constituents that could be used as raw materials for medicine and food. An in-depth study of Cotoneaster zabelii Schneid can provide a more accurate understanding of the value of its internal chemical composition, which can be widely applied in medicine to manufacture new drugs and promote the development of medical technology.

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“…This can be limited to not only the organic material formed during the photosynthesis process but also by other sources, such as solid municipal wastes [9][10][11][12]. The following are categories of biomass: wood and wood wastes, energy crop plants, organic parts contained in municipal solid waste and industrial waste, sewage sludge, plant by-products of food production and manure [13]. It is important to emphasize that all types of biomass in a raw material form are characterized by high moisture content, hygroscopicity and heterogeneity and a low carbon/oxygen (C/O) ratio, bulk density and calorific value [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Biomass Thermochemical Conversion via Pyrolysis with Integrated CO2 Capture

et al. 2020

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The presented work is focused on biomass thermochemical conversion with integrated CO2 capture. The main aim of this study was the in-depth investigation of the impact of pyrolysis temperature (500, 600 and 700 °C) and CaO sorbent addition on the chemical and physical properties of obtained char and syngas. Under the effect of the pyrolysis temperature, the properties of biomass chars were gradually changed, and this was confirmed by examination using thermal analysis, scanning electron microscopy, X-ray diffraction, and porosimetry methods. The chars were characterised by a noticeable carbon content (two times at 700 °C) resulting in a lower O/C ratio. The calculated combustion indexes indicated the better combustible properties of chars. In addition, structural morphology changes were observed. However, the increasing pyrolysis temperature resulted in changes of solid products; the differences of char properties were not significant in the range of 500 to 700 °C. Syngas was analysed using a gas chromatograph. The following main components were identified: CO, CO2, CH4, H2 and C2H4, C2H6, C3H6, C3H8. A significant impact of CaO on CO2 adsorption was found. The concentration of CO2 in syngas decreased with increased temperature, and the highest decrease occurred in the presence of CaO from above 60% to below 30% at 600 °C.

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Laboratory studies on the influence of biomass particle size on pyrolysis and combustion using TG GC/MS

Cited by 71 publications

References 40 publications

HTC of Wet Residues of the Brewing Process: Comprehensive Characterization of Produced Beer, Spent Grain and Valorized Residues

HTC of Wet Residues of the Brewing Process: Comprehensive Characterization of Produced Beer, Spent Grain and Valorized Residues

Natural and pyrolysis molecule of Cotoneaster zabelii Schneid

Biomass Thermochemical Conversion via Pyrolysis with Integrated CO2 Capture

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