Biomass torrefaction in a standard retort: A study on oil palm solid residues

Talero, Gabriel; Rincón, Sonia; Gómez, Alexánder

doi:10.1016/j.fuel.2019.02.008

Cited by 24 publications

(7 citation statements)

References 33 publications

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“…Torrefaction is the thermochemical process (similar to 'roasting')-typically at temperatures between 200 • C and 300 • C-occurring in the absence of oxygen, resulting in biochars [17]. Torrefaction allows the conversion of raw biomass into solid fuel with energy properties similar to bitumen and lignite coal [18], depending on the initial properties of the feedstock. In addition, the torrefied biomass storage and transportation conditions are improved.…”

Section: Discussionmentioning

confidence: 99%

Fuel Properties of Torrefied Biomass from Pruning of Oxytree

Świechowski

Liszewski²,

Bąbelewski³

et al. 2019

Data

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The very fast growing Oxytree (Paulownia Clon in Vitro 112) is marketed as a promising new energy crop. The tree has characteristically large leaves, thrives in warmer climates, and requires initial pruning for enhanced biomass production in later years. We explored valorizing the waste biomass of initial (first year) pruning via thermal treatment. Specifically, we used torrefaction (‘roasting’) to produce biochar with improved fuel properties. Here for the first time, we examined and summarized the fuel properties data of raw biomass of Oxytree pruning and biochars generated via torrefaction. The effects of torrefaction temperature (200~300 °C), process time (20~60 min), soil type, and agro-technical cultivation practices (geotextile and drip irrigation) on fuel properties of the resulting biochars were summarized. The dataset contains results of thermogravimetric analysis (TGA) as well as proximate and ultimate analyses of Oxytree biomass and generated biochars. The presented data are useful in determining Oxytree torrefaction reaction kinetics and further techno-economical modeling of the feasibility of Oxytree valorization via torrefaction. Oxytree torrefaction could be exploited as part of valorization resulting from a synergy between a high yield crop with the efficient production of high-quality renewable fuel.

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Section: Discussionmentioning

confidence: 99%

Fuel Properties of Torrefied Biomass from Pruning of Oxytree

Świechowski

Liszewski²,

Bąbelewski³

et al. 2019

Data

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“…Despite torrefaction being first introduced long ago, it has only gained popularity at the commercial level recently. In 2015, the estimated global production capacity of torrefied biomass was 450,000 tons per annum (Talero et al, 2019a).…”

Section: Tuntsev Et Al (2015)mentioning

confidence: 99%

“…However, much higher accuracy achieved by the Eulerian−Lagrange approach might not be feasible considering its enormous computational burden. A 2D CFD model was developed byTalero et al (2019a) to simulate torrefaction of oil palm solid residues in a standard retort under temperatures between 220−270 o C at residence time up to 60 min. The model could predict product yields and fuel properties (moisture content and LHV) and found the optimal conditions for the best trade-off between the solid yield and the LHV to be respectively 272 o C and 282 o C for empty fruit bunches and fibers at a heating rate of 10 o C min -1 and a residence time of 30 min.…”

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confidence: 99%

Modeling of thermochemical conversion of waste biomass – a comprehensive review

et al. 2021

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Thermochemical processes, which include pyrolysis, torrefaction, gasification, combustion, and hydrothermal conversions, are perceived to be more efficient in converting waste biomass to energy and value-added products than biochemical processes. From the chemical point of view, thermochemical processes are highly complex and sensitive to numerous physicochemical properties, thus making reactor and process modeling more challenging. Nevertheless, the successful commercialization of these processes is contingent upon optimized reactor and process designs, which can be effectively achieved via modeling and simulation. Models of various scales with numerous simplifying assumptions have been developed for specific applications of thermochemical conversion of waste biomass. However, there is a research gap that needs to be explored to elaborate the scale of applicability, limitations, accuracy, validity, and special features of each model. This review study investigates all above mentioned important aspects and features of the existing models for all established industrial thermochemical conversion processes with emphasis on waste biomass, thus addressing the research gap mentioned above and presenting commercial-scale applicability in terms of reactor designing, process control and optimization, and potential ways to upgrade existing models for higher accuracy.

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“…Torrefaction studies have largely been performed on woody and herbaceous biomass, including bamboo, beech, birch, eucalyptus, larch, pine, oak, willow, Miscanthus, and reed canary grass . The torrefaction of different agricultural residues was also examined in the literature, such as almond shells, arecanut husk, coffee residues, corncobs, cotton stalk, rape stalk, rice husk, ,, rice straw, , wheat straw, , sugar cane bagasse, olive wastes, , and oil palm wastes. − …”

Section: Introductionmentioning

confidence: 99%