Calorimetric analysis of powder compression: II. The relationship between energy terms measured with a compression calorimeter and tableting behavior

Rowlings, Colin E.; Wurster, Dale Eric; Ramsey, Peter J.

doi:10.1016/0378-5173(94)00290-l

Cited by 15 publications

(11 citation statements)

References 16 publications

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“…The magnitude of work was evaluated during the pelleting of spruce, pine, reed canary grass, switchgrass, timothy hay, and their blends. The closed-end die pelletizer attached to an Instron compaction machine with control software was used for the compaction simulation as described previously [11,13]. For each test, 1.2 g of biomass sample was fed into die in each run to produce a single pellet.…”

Section: Process Of Compaction For Biomass Pelletsmentioning

confidence: 99%

“…The compaction process starts as the ground biomass flow under pressure. Further compression during volume reduction of the material, for instance, for brittle materials, may require additional work [11,12]. The compression process also produces significant resistance at the wall of the die and shear stress at the edges of the pellet, which can result in extra consolidation [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Process and Energy Analysis of Pelleting Agricultural and Woody Biomass Blends

2018

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Unprocessed biomass has low energy density and high transportation cost. The energy generated through biomass can be enhanced by the pelletizing technique. In order to evaluate the energy requirement for the pelletizing of agricultural biomass, three different particle sizes (150-300, 300-425, and 425-600 µm) of reed canary grass (RCG), timothy hay (TH), and switchgrass (SW) were selected in the present work. Furthermore, two woody biomasses (spruce and pine) were also considered under similar experimental conditions for comparison purposes. An Instron machine attached to an in-house built pelletizer unit was employed to produce a single pellet. The energy demand for compacting ground biomass (spruce) with a particle size of 150 µm was lower (2.07 kJ) than those required for particle sizes of 300 µm (2.24 kJ) and 425 µm (2.43 kJ). The energy required for compacting ground reed canary grass, timothy hay, and switchgrass was lower (1.61, 1.97, and 1.68 kJ, respectively) than that required for spruce (2.36 kJ) and pine (2.35 kJ), evaluated at a 159-MPa load and at temperature of about 80 • C. The energy demand for blended biomass was around 2 kJ with the pellet quality approaching that of the pellets made from woody biomass. Overall, blending helped to improve the quality of pellets and lower the compaction energy requirements.

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Section: Process Of Compaction For Biomass Pelletsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Process and Energy Analysis of Pelleting Agricultural and Woody Biomass Blends

2018

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“…In addition, several researchers have also used compaction energetics in tableting research. [17][18][19] Most of the aforementioned approaches for understanding deformation mechanism require significant amounts of material. Early in formulation development, such amounts are typically not available.…”

Section: Introductionmentioning

confidence: 99%

Use of Compaction Energetics for Understanding Particle Deformation Mechanism

Aburub

Mishra

Buckner

2007

Pharmaceutical Development and Technology

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A primary goal of the current work was to examine the potential use of compaction energetics as a tool to predict particle deformation mechanism. Three deformation models, namely, those developed by Heckel, Walker, and Gurnham, were first used to evaluate the deformation mechanisms of 11 commonly used excipients. To complement the information gained from the deformation models, the mechanical energy used in tablet formation was then examined. It has been found that the sum of the work in the compression and decompression phases (plastic work) is a relatively good indicator of a material's plasticity. Conclusions based on this indicator regarding deformation mechanism for the different diluents used were in good agreement with those obtained from the different deformation models studied.

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“…Neben Arbeiten, in denen die Temperaturerhöhung der Tabletten durch Thermoelemente gemessen und durch einen einfachen Ansatz auf Basis der spezifischen Wärme-kapazität abgeschätzt wurde [7,8], berücksichtigte DeCrosta et al [9] in seiner thermodynamischen Analyse der Tablettierung die Wärmeströme, gemessen mit einem Kompaktier-Kalorimeter [10], von der Tablette in die Stempel und deren Umgebung. Mithilfe von Infrarotkameras wurden zeitabhängige Oberflächentemperaturen von Tabletten erfasst [11].…”

Section: Introductionunclassified

Tablet Production – Energy Dissipation and Temperature Increase

Gilson

Bröckel

2014

Chemie Ingenieur Technik

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Tablet Production -Energy Dissipation and Temperature IncreaseThe tableting process causes a temperature increase due to dissipation of energy. Therefore, with time the temperature of the tablets and the tablet press increases. Depending on the calculated tablet temperature, this temperature increase is discussed for different compression forces and lubricant concentrations. Two different measurement techniques are presented and compared.

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Calorimetric analysis of powder compression: II. The relationship between energy terms measured with a compression calorimeter and tableting behavior

Cited by 15 publications

References 16 publications

Process and Energy Analysis of Pelleting Agricultural and Woody Biomass Blends

Process and Energy Analysis of Pelleting Agricultural and Woody Biomass Blends

Use of Compaction Energetics for Understanding Particle Deformation Mechanism

Tablet Production – Energy Dissipation and Temperature Increase

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