Effects of compressive stress, feeding rate and speed of rotation on palm kernel oil yield

Akinoso, Rahman; Raji, A. O.; Igbeka, J. C.

doi:10.1016/j.jfoodeng.2009.02.010

Cited by 27 publications

(22 citation statements)

References 4 publications

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“…From Table 1 is evident that the energy demand to obtain 1 g of oil in the case of Jatropha seeds was significantly less than the energy requirement for the other seeds.Mechanical properties of soybean were also determined by other authors [11; 12]. Very similar results of pressing palm were also found by other authors [13,14].…”

Section: Figure 2 Measured Amounts Of Pressing Characteristic Of Difsupporting

confidence: 85%

Mechanical behaviour of selected bulk oilseeds under compression loading

Mizera

Herák

Hrabě

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Pressing of vegetable oils plays an important role in modern agriculture. This study was focused on the linear pressing of soybean seeds (Glycine max L.), Jatropha seeds (Jatropha curcas L.) and palm kernel (Elaeisguineensis). For pressing test the compressive device (ZDM, model 50, Germany) was used. The maximum pressing force of 100 kN with a compression speed of 1 mm s í1 was used to record the force-deformation characteristics. The pressing vessel with diameter 60 mm and initial height of seeds 80 mm were used. The specific energy per gram of oil of soybean, palm kernel and Jatropha was 158.92 ± 7.21, 128.78 ± 8.36 and 68.26 ± 5.94 J.goil-1, respectively. The oil content of soybean, palm kernel and Jatropha was 20.4 ± 1.23, 44.7 ± 2.27 and 34.2 ± 1.75 %, respectively. Water concentration, dynamic and kinematic viscosity of obtained oils was also determined.

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Section: Figure 2 Measured Amounts Of Pressing Characteristic Of Difsupporting

confidence: 85%

Mechanical behaviour of selected bulk oilseeds under compression loading

Mizera

Herák

Hrabě

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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“…This means that at a higher speed the processing time for the oil flow from the solids is reduced. The input pressure or compressive stress also determines the oil processing time and energy demand for maximum oil recovery (Akinoso et al, 2009;Karaj and Muller, 2011;Kabutey et al, 2015). Considering the energy-intensive and time-consuming nature of the traditional oil processing of roasted kernels, direct processing of unroasted kernels would be less labour intensive and more environmentally friendly.…”

Section: Resultsmentioning

confidence: 99%

“…In the literature, there is very limited information on compression loading test of oil palm kernels (Akinoso et al, 2009;Akinoso and Raji, 2011;Ozumba and Obiakor, 2011). The studies available, however, mainly focused on the effects of compressive force, speed, temperature, moisture content and loading positions of single or bulk kernels by evaluating the rupture force, deformation, energy and toughness.…”

Section: Introductionmentioning

confidence: 99%

“…In the industrial practice, however, optimization of the mechanical oil extraction has been also centred on process parameters namely pressure, feeding rate, speed of rotation, temperature, pressing time, moisture content, size reduction and heat treatment (Akinoso et al, 2006(Akinoso et al, , 2009Deli et al, 2011;Karaj and Muller, 2011;Ogunsina et al, 2008). Akinoso et al (2009) especially reported that maximum oil yield of 46.3 % was found at a compressive stress of 30 MPa, feed rate of 150 kg h -1 and rotational speed of 110 r.p.m.…”

Section: Introductionmentioning

confidence: 99%

“…Akinoso et al (2009) especially reported that maximum oil yield of 46.3 % was found at a compressive stress of 30 MPa, feed rate of 150 kg h -1 and rotational speed of 110 r.p.m. while minimum oil yield of 16.3 % was obtained at 10 MPa compressive stress, 50 kg h -1 feed rate and 110 r.p.m.…”

Section: Introductionmentioning

confidence: 99%

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Oil point and mechanical behaviour of oil palm kernels in linear compression

Kabutey¹,

Herák²,

Chotěborský³

et al. 2017

International Agrophysics

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The study described the oil point and mechanical properties of roasted and unroasted bulk oil palm kernels under compression loading. The literature information available is very limited. A universal compression testing machine and vessel diameter of 60 mm with a plunger were used by applying maximum force of 100 kN and speed ranging from 5 to 25 mm min−1. The initial pressing height of the bulk kernels was measured at 40 mm. The oil point was determined by a litmus test for each deformation level of 5, 10, 15, 20, and 25 mm at a minimum speed of 5 mmmin−1. The measured parameters were the deformation, deformation energy, oil yield, oil point strain and oil point pressure. Clearly, the roasted bulk kernels required less deformation energy compared to the unroasted kernels for recovering the kernel oil. However, both kernels were not permanently deformed. The average oil point strain was determined at 0.57. The study is an essential contribution to pursuing innovative methods for processing palm kernel oil in rural areas of developing countries.

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Characterization of Amount and Quality of Tucuman Kernel Oil as a Potential Biomass

Didonet¹,

Antoniassi

Back

et al. 2020

J Americ Oil Chem Soc

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Amazonian tucuman (Astrocaryum aculeatum) fruit pulp is consumed directly without heat treatment, and is appreciated in the region of Manaus, Amazonas State, Brazil. The kernel is discarded after pulp removal, resulting in costs related to waste management. This study aimed to perform an estimate on the annual amount of kernels generated by commercialization of tucuman fruit in six markets in Manaus by monthly application of questionnaires to merchants. The yield of edible pulp and kernels were assessed, as well as the yield and characteristics of kernel oil. Fruits consisted of pulp (26% fresh weight) and the coproduct is mainly pyrene (70%), comprising a hard woody endocarp (61%) and an oily kernel (39% dry weight). Kernel oil yield ranged from 28% to 45%. The generated coproducts were estimated as 272 t/y (fresh weight) and approximately 6–10 t/y of lauric oil could be obtained. The main fatty acids were lauric—12:0 (52.3–57.5%) and myristic—14:0 (23.4–27.1%), presenting a similar profile to other lauric oils such as coconut, palm kernel, and babassu oils. Oxidative stability ranged from 20 to 44 hours, which is considered high compared to other lauric oils. The recovery of this coproduct will improve the sustainability of the tucuman chain, providing a new product of Amazonian biodiversity and reducing the environmental impact.

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Effects of compressive stress, feeding rate and speed of rotation on palm kernel oil yield

Cited by 27 publications

References 4 publications

Mechanical behaviour of selected bulk oilseeds under compression loading

Mechanical behaviour of selected bulk oilseeds under compression loading

Oil point and mechanical behaviour of oil palm kernels in linear compression

Characterization of Amount and Quality of Tucuman Kernel Oil as a Potential Biomass

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