Analysis of physical and mechanical properties and of gross calorific value of Jatropha curcas seeds and waste from pressing process
¹Technical University of Košice, Faculty of Manufacturing Technologies, Department of Technological Systems Operation, Štúrova 31, Prešov 08001, Slovak Republic;
²Department of Material Science and Manufacturing Technology, Faculty of Engineering, Czech University of Life Science, Kamýcká 129, 16521 Prague, Czech Republic
The research was performed with an aim to investigate physical and mechanical properties and a gross calorific value of Jatropha curcas seeds and particular products (waste) of a pressing process. Sizes of seeds, an energy which is necessary for pressing an oil and a setting of the gross calorific value were tested parameters. Tests were performed at Jatropha Curcas seeds of a brown colour (that means gnaw). The pressing process waste amounts up to 80%. The proportion of the kernel mass to the coat mass is 1:0.62. From the research results it follows that the coat mass is 37.60%. The seed coat belongs among interesting material owing to the gross calorific value. For pressing the whole seeds it is necessary of about 30% higher energy than for pressing the kernels of Jatropha curcas.