Energy Analysis for Biodiesel Production from Rapeseed Oil

Abstract

The objective of this study was to evaluate the energy input and output for winter rapeseed cultivation and biodiesel production from rapeseed oil. The total energy use for winter rapeseed cultivation and biodiesel production proceses were 10485.04 MJ/ha and 9199.48 MJ/ha, respectively. The total energy inputs for winter rapeseed cultivation were consisted of 2599.15 MJ/ha direct energy input and 7885.89 MJ/ha indirect energy input. The total energy input was calculated as 4889.66 MJ/t for winter rapeseed cultivation. The average rapeseed and straw yield were 2144.4 kg and 1154.6 kg per hectare cultivated area, respectively. The energy output of rapeseed 56826.6 MJ/ha, if only the seed was taken into account. The output/input ratio for rapeseed cultivation was 7.30 if straw was included. The net energy production was calculated as 66085.22 MJ per hectare of cultivated area. The total energy input was 19684.52 MJ/ha for rapeseed biodiesel production. The energy consumed for the conversion of refined rapeseed oil into biofuel was 6197.32 MJ/ha, which accounted for 67.37% of the total energy consumtion of biodiesel production processes. The total energy output of rapeseed biodiesel processes was consisted of 26768.97 MJ/ha in the form of biodiesel, 4095.8 MJ/ha of in the form of rapeseed meal (cake) and 2558.99 MJ/ha in the form of glycerin. The energy ratio was 2.70 for the rapeseed biodiesel production chain. The specific energy and the energy productivity for rapeseed biodiesel production were calculated as 24.41 MJ/kg and 0.0409 kg/MJ, respectively. The net biodiesel production was 7084.45 MJ/ha, which correspond to 213.39 L biodiesel per hectare of cultivated area.

Biodiesel production from non-edible plant oils

“…Interest in the use of biofuels worldwide has grown strongly in recent years due to the limited oil reserves, concerns about climate change from greenhouse gas emissions and the desire to promote domestic rural economies (Balat and Balat, 2009;Ozturk, 2014). The term biofuel is as such referred to solid, liquid, or gaseous fuels that are produced from plant matter and residues, agricultural crops, municipal wastes, and agricultural and forestry by-products (Aburas and Demirbas, 2015a;Qin et al, 2009Qin et al, , 2010Altun and Yasar, 2013).…”

Application of blast furnace slag as a catalyst for catalytic cracking of used frying sunflower oil

“…These negative situations, especially the growing concerns relating to the environment and depletion of fossil fuel reserves, have directed researchers towards renewable resources that can produce environmentally friendly biofuels (Buzetzki et al., 2011; Yigezu and Muthukumar, 2014). In this context, vegetable oils and fats are important resources for the production of motor fuels (Buzetzki et al., 2011; Doronin et al., 2013; Ozturk, 2014). However, the biofuel production path using non-edible oils or waste cooking oils rather than edible vegetable oils is more desirable due to the higher price of edible oils compared to that of petro diesel (Fadhil et al., 2012; Laksmono et al., 2013).…”

Modelling of Biofuel Potential as a Tool for Public Managers

“…In any case, there is a shift in development towards the predictions predicted by the above-mentioned prediction [50]. For oilseed rape, the net yields are 7084.45 MJ/ha per year [51]. The values we consider reach 22,080.5-114,818.6 MJ/ha per year.…”