Mechanical strength of bio-coke from briquettes

Florentino-Madiedo, L.; Díaz-Faes, E.; Barriocanal, C.

doi:10.1016/j.renene.2019.07.139

Cited by 31 publications

(23 citation statements)

References 35 publications

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“…Some authors [17,18] have experimented with coal replacement by charcoal between 2-10% in cokemaking, stating that no important degradation of final biocoke's mechanical strength took place, achieving 1-5% CO 2 net emissions reduction. New discoveries such as using dense and demineralized charcoal and coking enhancers are seen as a way to further optimize this technique [19,20].…”

Section: Introductionmentioning

confidence: 99%

Impact of the Addition of Pyrolysed Forestry Waste to the Coking Process on the Resulting Green Biocoke

Solar

Caballero

Barriocanal

et al. 2021

Metals

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The suitability of the charcoal obtained from woody biomass pyrolysis in a continuous screw reactor at 573, 773, 973, 1173 K temperature profile as fuel and reducing agent in metallurgical applications has been evaluated, in order to reduce the CO2 emissions in these processes. On the one hand, a comparative study between charcoal and commercial reducers has been carried out. On the other hand, different proportions of this charcoal have been added to an industrial coking coal blend and carbonized together in a semi-pilot movable wall oven, to study the influence in the plastic and mechanical properties of the produced biocoke. The charcoal obtained fulfills the requirements to be used as fuel and reducer in non-ferrous processes where no mechanical strength is required, like rotary kilns, in substitution of fossil reducers. Its higher heating value (>32 MJ kg−1) is in the range or over those of fossil coals, with the advantage of not containing polluting elements (S, N) and having less ash. The addition of up to 0.9 wt.% almost does not affect the quality of the biocoke; but the addition of ³2 wt.% degrades the biocoke mechanical and plastic properties below the demanded requirements. Moreover, biocoke reactivity seems independent of the amount of charcoal added.

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Section: Introductionmentioning

confidence: 99%

Impact of the Addition of Pyrolysed Forestry Waste to the Coking Process on the Resulting Green Biocoke

Solar

Caballero

Barriocanal

et al. 2021

Metals

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“…Despite such a wide application of thermographic research, it is very rarely used to study agglomeration processes [ 45 ]. The pressurized agglomeration is the key process that is presently employed in the power [ 50 , 51 , 52 , 53 , 54 ], heavy [ 55 , 56 , 57 , 58 ], chemical [ 59 , 60 ], and pharmaceutical industry [ 61 , 62 , 63 ]. Industries have willingly used roller presses rather than other briquetting machines, for example, screw or punch briquette machines [ 50 , 53 ], due to constant operability with a relatively low demand for energy [ 64 , 65 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Temperature Distribution on the Surface of Saddle-Shaped Briquettes Consolidated in the Roller Press

Bembenek

Uhryński

2021

Materials

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The unit pressure in the fine-grained material consolidation process in the roller press can reach over hundred MPa and is a parameter which results, among other things, from the properties of the consolidated material and the compaction unit geometry. Its value changes depending on the place on the molding surface. Generating different pressure on the surface of briquettes makes their compaction different. One’s own and other researchers’ experience shows that, in the case of exerting high pressure on the merged fine-grained material, the higher unit pressure exerted on the material, the higher temperature of the consolidated material is. The temperature distribution on the surface of the briquettes can testify the locally exerted pressure on the briquette. The stress distribution in the briquetting material is still a subject of research. The article includes thermography studies of the briquetting process of four material mixtures. Thermal images of briquettes were taken immediately after they left the compaction zone as well as forming rollers. The obtained thermograms and temperature variability at characteristic points of the surface of briquettes were analyzed. The correlation between the temperature distribution and the stress distribution in the briquettes was determined.

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“…The consolidation of fine-grained materials brings many positive economic, ecological and technological aspects [ 1 , 2 , 3 , 4 , 5 ]. Modern industry aims at the sustainable use of available raw materials and reduction of the production costs [ 6 ] while reducing the harmfulness of the process to the environment [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

The Analysis of the Morphology of the Saddle-Shaped Bronze Chips Briquettes Produced in the Roller Press

et al. 2021

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This paper presents the results of the investigations of the properties of saddle-shaped copper alloy chips briquettes produced in a roller press. The physical and mechanical properties of the investigated briquettes were examined on their external surfaces as well as on their cross-sections. The density, chemical composition, microstructure analysis obtained with a 3D and scanning microscope, surface roughness and hardness of the obtained briquettes were investigated. The research proved the differentiation of the physical and mechanical properties of briquettes depending on the investigated area of their surface. The analysis of changes in the porosity of briquettes on their cross-section showed zones of various densification levels. This research expands the knowledge of the processes taking place during the compaction and consolidation of granular materials in roller presses as well as the knowledge concerning designing the geometry of forming tools.

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Mechanical strength of bio-coke from briquettes

Cited by 31 publications

References 35 publications

Impact of the Addition of Pyrolysed Forestry Waste to the Coking Process on the Resulting Green Biocoke

Impact of the Addition of Pyrolysed Forestry Waste to the Coking Process on the Resulting Green Biocoke

Analysis of the Temperature Distribution on the Surface of Saddle-Shaped Briquettes Consolidated in the Roller Press

The Analysis of the Morphology of the Saddle-Shaped Bronze Chips Briquettes Produced in the Roller Press

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