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1

Handling and transportation properties of rapeseed biomass as affected by particle size

Bojanowska Milena

Zeszyty Naukowe Akademii Morskiej w Szczecinie

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2023

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nr 74 (146)

5--15

EN

Rapeseed by-products of seeds de-oiling, particularly expellers and post-extracted meal, are currently considered an important biomass that can be used as an alternative energy source, either in raw form or after conversion to biochar. Rapeseed biomass represents a difficult-to-handle cargo, mainly due to its sensitivity to mechanical, climatic, and biological impacts, as well as its dusty nature. This study aims to determine the physical properties of rapeseed meals and their fractions. Morphological and chemical features of six particle sets are investigated in order to explain the variation in their physical properties having importance in handling and transportation processes. The true density of fractions increases when the particle size decreases due to the diminishing quantitative share of seed coats. No correlation is observed between true and bulk densities, as the particle shape, surface sculpture, and adhesion affect the mutual particle arrangements. Along with a decrease in the particle size from 0.4 mm, a rapid decrease in the flowability is observed. The tendency of the finest dust (d < 0.075 mm) to form agglomerated complexes causes its lower bulk density, higher porosity, and higher angles of repose in comparison to coarse dust (0.075–0.4 mm). It is concluded that a relatively low tendency to free flowing of natural RSM is mainly caused by its wide-ranging particle size distribution and their geometry differentiation, which facilitate mutual particle interlockings. The known cases of blockages of silos, bins, hoppers, and transfer chutes may be mainly caused by the powder fractions (< 0.2 mm), with a much lower flowability than other particles.

2

Adsorpcja fenoli na węglach aktywnych otrzymanych ze śruty rzepakowej

Pstrowska K., Walendziewski J., Szary J., Łużny R., Świątek Ł.

Przemysł Chemiczny

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2015

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T. 94, nr 5

823-827

PL

Przeprowadzono badania przydatności stałej pozostałości z procesu wolnej pirolizy śruty rzepakowej do wytwarzania węgli aktywnych. Aktywowane chemicznie (800°C, 3:1 KOH) oraz fizycznie (H₂O, 800°C do 50% ubytku masy) materiały charakteryzowały się dobrze rozwiniętą porowatością i powierzchnią właściwą (SBET 380–2400 m²/g) oraz znaczną zdolnością sorpcji fenolu (do 332 mg/g) i para-chlorofenolu (do 482 mg/g) z roztworów wodnych. Wykazano, że zdolność sorpcyjna otrzymanych materiałów węglowych w procesie oczyszczania wody z fenoli jest porównywalna ze zdolnością sorpcyjną handlowych węgli.

EN

Rapeseed oil cake was pyrolyzed at 500°C for 30 min, carbonized at 800°C for 1 h, activated with steam or KOH at 800°C for 1 h, studied for sp. surface and pore vol. and then used for removal of PhOH or p-ClC₆H₄OH from aq. solns. The prepd. sorbent showed the sorption capacity by 35–38% higher than 2 com. activated carbons used for comparison.

3

Hydrotermalny rozkład produktów odpadowych z pozyskiwania oleju rzepakowego. Cz 2, Śruta rzepakowa

Pińkowska H., Wolak P., Oliveros E.

Przemysł Chemiczny

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2013

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T. 92, nr 2

222-228

4

Possibilities of utilizing the solid by-products of biodiesel production - a review

Gąsiorek E., Wilk M.

Polish Journal of Chemical Technology

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2011

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Vol. 13, nr 1

58-62

EN

As a consequence of the intended rise in the volume of the biodiesel produced by the member states of the European Union, predominantly from rapeseeds and sunflower seeds, the quantity of the by-products being generated, e.g. glycerol, rapeseed/sunflower seed straw and rapeseed/sunflower seed meal, will increase dramatically. It is therefore recommendable to find effective methods for their processing or utilization in order to reduce the costs of biodiesel production without polluting the environment by excessive wastes. As the utilization of glycerol has often been addressed in the literature1, the aim of our study is to describe the potentiality for utilizing the solid by-products of biodiesel production, namely rapeseed/sunflower straw and rapeseed/ sunflower seed meal.