Comparative study on energy sustainability of biofuel production chains

被引:18
作者
Cocco, D. [1 ]
机构
[1] Univ Cagliari, Dept Mech Engn, I-09123 Cagliari, Italy
关键词
biodiesel; bioethanol; biomass power production; energy sustainability;
D O I
10.1243/09576509JPE365
中图分类号
O414.1 [热力学];
学科分类号
摘要
This paper is concerned with a comparative study of the energy sustainability of the production of biodiesel from oleaginous plants (rape and sunflower), of bioethanol from sugar crops (sugar beet and sweet sorghum) and of electricity from lignocellulose materials (miscanthus and short rotation forestry poplar). The results show the lignocellulose feedstock to perform best in terms of both net energy produced per unit area of cultivated land, from around 184 GJ/ha to more than 434 GJ/ha, and of energy ratio between energy produced and energy consumed, in the order of 12-19. Biodiesel and bioethanol production were found to be less advantageous in terms of energy sustainability, especially when residues and by-products are not used as feedstock. For bioethanol production, sweet sorghum exhibited the higher energy ratio of around 5.2, due mainly to the heat recovered from residue in cogeneration plants. As for biodiesel production, neither the rape nor the sunflower proved to be particularly sustainable with an energy ratio of around 1.3-1.4, but performance can be improved using the agricultural and industrial processing residues to produce energy, increasing energy ratios up to 3.4-4.2.
引用
收藏
页码:637 / 645
页数:9
相关论文
共 28 条
[21]   Productivity and water use efficiency of sweet sorghum as affected by soil water deficit occurring at different vegetative growth stages [J].
Mastrorilli, M ;
Katerji, N ;
Rana, G .
EUROPEAN JOURNAL OF AGRONOMY, 1999, 11 (3-4) :207-215
[22]   Comparison of the energy performance of fibre sorghum, sweet sorghum and wheat monocultures in northern Italy [J].
Monti, A ;
Venturi, G .
EUROPEAN JOURNAL OF AGRONOMY, 2003, 19 (01) :35-43
[23]  
PAHL G, 2005, BIODISEL GROWING NEW
[24]  
Riva G., 2000, IMPIANTI BIOMASSE PR
[25]  
SANTOS MAD, 2006, ENERGY ANAL CROPS US
[26]   Mechanization and costs of primary production chains for Miscanthus x giganteus in the Netherlands [J].
Venturi, P ;
Huisman, W ;
Molenaar, J .
JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH, 1998, 69 (03) :209-215
[27]   Analysis of energy comparison for crops in European agricultural systems [J].
Venturi, P ;
Venturi, G .
BIOMASS & BIOENERGY, 2003, 25 (03) :235-255
[28]   ENERGY ANALYSIS OF ETHANOL-PRODUCTION FROM SWEET SORGHUM [J].
WORLEY, JW ;
VAUGHAN, DH ;
CUNDIFF, JS .
BIORESOURCE TECHNOLOGY, 1992, 40 (03) :263-273