Influence of Parameters of the Torrefaction Process on the Selected Parameters of Torrefied Woody Biomass

Wróbel, Marek; Hamerska, Joanna; Jewiarz, Marcin; Mudryk, Krzysztof; Niemczyk, Marzena

doi:10.1007/978-3-319-72371-6_68

Cited by 10 publications

(6 citation statements)

References 8 publications

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“…In turn, Tsai et al [33] stated that in the case of biochars, the gross calorific value increases at up to 500 °C and then remains relatively constant. Similar results were obtained by Poudel et al [48] for empty fruit bunches and palm kernel shell and by Wróbel et al [49] for woody biomass.…”

Section: Net and Gross Calorific Valuessupporting

confidence: 88%

Assessment of energy parameters of biomass and biochars, leachability of heavy metals and phytotoxicity of their ashes

Mierzwa–Hersztek

Gondek

Jewiarz

et al. 2019

J Mater Cycles Waste Manag

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103

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The aim of this study was to determine selected energy parameters, leachability of heavy metals and phytotoxicity of biomass ash for different types of plant biomass (wheat straw, miscanthus straw, bark and sawdust) and poultry manure, as well as biochars produced from them. Based on data from proximate and ultimate analysis of the investigated materials, fuel value index (FVI) was calculated to determine their suitability for energy production. The ashes were analyzed for both chemical composition and leaching behavior. The phytotoxicity test of aqueous ash extracts was performed for Lepidium sativum L. It was found that the calorific value of biochars was higher on average by 36% than the value determined for feedstocks used in the pyrolysis process. The pyrolysis of organic materials resulted in the reduction of the volatile matter content. The gross calorific value was determined in biochars formed from miscanthus straw and sawdust which were 26.6 and 23.4 MJ kg −1 , respectively. Leachability of heavy metals of biomass ash was highly diverse and depended on the analyzed element and the material type. The phytotoxicity analysis showed that, in general, each of the ash extracts tested had a positive effect on the growth of Lepidium sativum L. compared to the control. The use of ash, fertilizer, or sorbents can be an interesting alternative for materials with high ash content. In all these cases, biochars seem to be very attractive materials that can be used not only in energy production. Given the high carbon content of biochar obtained in the pyrolysis process, it has a high-energy potential and can be used as a biofuel.

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Section: Net and Gross Calorific Valuessupporting

confidence: 88%

Assessment of energy parameters of biomass and biochars, leachability of heavy metals and phytotoxicity of their ashes

Mierzwa–Hersztek

Gondek

Jewiarz

et al. 2019

J Mater Cycles Waste Manag

Self Cite

103

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“…It is known that the high temperature in the 150-300 • C range used in the torrefaction process also affects the compaction. This leads to an improvement in the raw material grindability but complicates the compactions process, mainly due to the decomposition of lignin, which acts as the binder during the densification [56][57][58][59][60][61][62].…”

Section: Introductionmentioning

confidence: 99%

Influence of Raw Material Drying Temperature on the Scots Pine (Pinus sylvestris L.) Biomass Agglomeration Process—A Preliminary Study

et al. 2020

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For biomass compaction, it is important to determine all aspects of the process that will affect the quality of pellets and briquettes. The low bulk density of biomass leads to many problems in transportation and storage, necessitating the use of a compaction process to ensure a solid density of at least 1000 kg·m−3 and bulk density of at least 600 kg·m−3. These parameters should be achieved at a relatively low compaction pressure that can be achieved through the proper preparation of the raw material. As the compaction process includes a drying stage, the aim of this work is to determine the influence of the drying temperature of pine biomass in the range of 60–140 °C on the compaction process. To determine whether this effect is compensated by the moisture, compaction was carried out on the material in a dry state and on the materials with moisture contents of 5% and 10% and for compacting pressures in the 130.8–457.8 MPa range. It was shown that drying temperature affects the specific density and mechanical durability of the pellets obtained from the raw material in the dry state, while an increase in the moisture content of the raw material neutralizes this effect.

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“…[27], (4) agglomeration process-e.g., assessment of physic-mechanical properties of agglomerate and the effect of added biochar and bio-oil etc. [10,[28][29][30][31][32], (5) the torrefaction process-biomass torrefaction [33][34][35][36][37][38], hydrothermal waste carbonization, wood mixtures etc. [39,40] and the remaining group, in which the authors raised topics such as composition testing and combustion modeling in household.…”

Section: Introductionmentioning

confidence: 99%

Thermal Treatment of Biomass: A Bibliometric Analysis—The Torrefaction Case

et al. 2020

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The aim of the paper was to summarize and discuss current research trends in biomass thermal treatment (torrefaction process). Quantitative analyses were carried out, in which the main countries, research units and scientists were indicated. The analysis showed a clear upward trend in number of publications after 2010. Most scientists on selected topics come from China, USA, Canada, South Korea, Republic of China, Poland (Web od Science—Core Collection (WoS-CC) and Scopus databases). Quantitative analysis also showed that the most relevant WoS-CC categories in the summary are: Energy Fuels, Engineering Chemical, Agricultural Engineering, Biotechnology Applied Microbiology and Thermodynamics and Scopus Subject area: Energy, Chemical Engineering, Environmental Science, Engineering and Chemistry. Thematic analysis included research topics, process parameters and raw materials used. Thematic groups were separated: torrefaction process (temp.: 150–400 °C), hydrothermal carbonization process (HTC) (temp: 120–500 °C), pyrolysis process (temp.: 200–650 °C) and gasification and co-combustion process (temp.: 350–1600 °C). In the years 2015–2019, current research topics were: new torrefaction technologies (e.g., HTC), improvement of the physico-mechanical, chemical and energetic properties of produced fuel as well as the use of torrefied biomass in the process of pyrolysis, gasification and co-combustion. The raw materials used in all types of biomass thermal treatment were: energy crops, wood from fast-growing and exotic trees, waste from the agri-food industry, sewage sludge and microalgae.

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Influence of Parameters of the Torrefaction Process on the Selected Parameters of Torrefied Woody Biomass

Cited by 10 publications

References 8 publications

Assessment of energy parameters of biomass and biochars, leachability of heavy metals and phytotoxicity of their ashes

Assessment of energy parameters of biomass and biochars, leachability of heavy metals and phytotoxicity of their ashes

Influence of Raw Material Drying Temperature on the Scots Pine (Pinus sylvestris L.) Biomass Agglomeration Process—A Preliminary Study

Thermal Treatment of Biomass: A Bibliometric Analysis—The Torrefaction Case

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