Comparative study of calorific value of rapeseed, soybean, jatropha curcas and crambe biodiesel

Abstract

Abstract. Biodiesel is a mixture of esters of short chain alcohols, produced as an alternative fuel for mineral diesel substitution. It is originated from renewable sources (fats and oils) and is less pollutants. But for its implementation, it is necessary to analyze some important quality parameters. A very important fuel`s feature is the calorific value, which represents the amount of heat transferred into the chamber during the combustion and indicates the available energy in fuel. The calorific value is obtained experimentally using a calorimetric bomb. The higher the calorific value, the higher is the yield of the fuel. The aim of this study is to determine the calorific value of rapeseed, soybean, jatropha curcas and crambe biodiesel using a calorimetric bomb. The results were associated with the ethyl ester composition of each biodiesel. The crambe biodiesel shows the highest calorific value (∆H= 40564 J g -1 ) influenced by the high amount of long chain ethyl ester originated from behenic acid (C22:0) that composes 57.2% of crambe oil. The rapeseed, soybean and jatropha curcas biodiesel that exhibit approximately the same amount of long chain ethyl ester showed calorific values near to ∆H= 39450 J g -1 .

Effects of biodiesel from different feedstocks on engine performance and emissions: A review

“…The longer the carbon chain of the ethyl ester the higher calorific value [100]. Table 5 shows the fuel properties of various biodiesels from different feedstocks…”

“…Generally, the calorific value is obtained experimentally using a calorimetric bomb. The calorific value of biodiesel is lower (39-41 MJ/kg) compared with other liquid fuels such as petrol (46 MJ/kg), diesel fuel (43 MJ/kg) or oil (42 MJ/ kg), but higher than coal (32-37 MJ/kg) [100]. The calorific value is divided in inferior calorific power (ICP) and superior calorific power (SCP).…”

Environmental Impact Associated with the Supply Chain and Production of Biodiesel from Jatropha curcas L. through Life Cycle Analysis

“…E B is the energy from the produced biofuel, which was calculated with the lower heating value (LHV) of 40 MJ kg −1 [48,51]. CED is the cumulative energy demand from the production life cycle, this includes the whole of the energy supplied to the upstream process until obtaining 1 kg of biodiesel.…”

Potential, Cultivation and Quality of Some Crambe Sp. in Southern Turkey

“…The Crambe biodiesel shows the highest calorific value (∆H= 40564 J g -1 ), influenced by the high amount of long chain ethyl ester originated from behenic acid (C22:0) that composes 57.2% of Crambe oil. The rapeseed, soybean and Jatropha curcas biodiesel that exhibit approximately the same amount of long chain ethyl ester showed calorific values near to ΔH = 39450 J g -1 (Oliveira et al, 2013). Moreover, the results show that the longer the carbon chain of the ethyl ester the higher is calorific value.…”