Energy demands for pressing Jatropha curcas L. seeds

Herák, D.; Gürdil, Gürkan Alp Kağan; Sedláček, A.; Dajbych, O.; Simanjuntak, Satya

doi:10.1016/j.biosystemseng.2010.06.002

Cited by 35 publications

(46 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the results, rapeseeds showed the greatest energy requirement of 53% input energy followed by jatropha and sunflower. Further, the determined amounts at oil point in the present study were higher compared to different studies reported in the literature (Blahovec and Reznicek, 1980;Danilov, 1976;Faborode and Favier, 1996;Fomin, 1978;Fornal et al, 1994;Herak et al, 2010;Koegel et al, 1973;Mrema and Mc Nulty, 1985;Sukumaran and Singh, 1989;Singh et al, 1984). Comparing maximal deformation ratios (Fig.…”

Section: Resultscontrasting

confidence: 66%

“…2) which has been severally verified with the pressing of oilseed crops (Herak et al, 2010;2011a;2011b):…”

Section: Theoretical Limit Deformationmentioning

confidence: 82%

“…In addition from the results of this study, the tangent curve equation (Eq. 2) (Herak et al, 2010;2011a;2011b) comparing with the measured dependency, described ac- x max -true deformation, x o -deformation at oil point, δ-limit deformation, F o -compressive force at oil point, E o -deformation energy at oil point, E-maximal deformation energy curately the dependency between the compressive force and deformation characteristic of the pressed seeds. On the deformation curve of the pressed seeds (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…In the literature, considerable information about the mechanical behaviour of the oilseed crops namely rapeseed Rusinek et al, 2007;Unal et al, 2009); sunflower seed (Gupta and Das, 1997;2000;Isik and Izli, 2007;Perez et al, 2007), and jatropha seed (Herak et al, 2010;Karaj and Muller, 2010;Sirisomboon et al, 2007), have been focused on rupture force and deformation characteristics (Fomin et al, 1978;Herak et al, 2011a;Kabutey et al, 2011;Koegel et al, 1973;Mrema and Mc Nluty, 1985), unlike the mathematical description of the deformation characteristics, limit deformation ratio, maximal deformation ratio, energy ratio and oil point deformation ratio.…”

Section: Introductionmentioning

confidence: 99%

“…Considering rapeseed, sunflower seed and jatropha seed, not many studies (Faborode and Favier, 1996;Figueiredo et al, 2011;Herak et al, 2010) highlight the oil point determination under compression loading. To design pressing technology with minimum energy efficiency with respect to maximum oil output, it is important to understand in detail the mechanical behaviour of seeds pressed mixture under compression loading (Blahovec and Reznicek, 1980;Fomin, 1978).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Comparison of the Mechanical Behaviour of Selected Oilseeds under Compression Loading

Herák

Kabutey

Divišová

et al. 2012

Not Bot Hort Agrobot Cluj

View full text Add to dashboard Cite

The present study provides information about the comparison of mechanical behaviour of selected oil bearing crops namely rapeseeds (Brassica napus L.), sunflower seeds (Helianthus annus L.) and jatropha seeds (Jatropha curcas L.) under compression loading. In this research, the compression device ZDM 50 with a chart recorder and a pressing vessel with diameter 100 mm were used to determine the relationship between the magnitude of the pressing force and deformation characteristics of the oilseed crops pressed at initial height 80 mm. From the compression test, the amounts of true deformation, maximal deformation energy and compressive force of the pressed samples were calculated and also mathematical equations describing the limit deformation, maximal deformation ratio, energy ratio and oil point deformation ratio were determined. The oil point position on the deformation curve, that is, the first leakage of oil from the pressing vessel of the various oilseeds was determined and compared. Based on the measured amounts rapeseeds achieved the highest values followed by jatropha seed and then sunflower seed. The amount of deformation energy required for the seed deformation gives the indication the amount of energy needed for obtaining the oil from the seed. It was found that the measured amounts as well as the oil point position on the force-deformation curve of the pressed samples showed varying results due to the seeds physical and inherent characteristics.

show abstract