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1 Center for Chinese Agricultural Policy, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
* Author to whom correspondence should be addressed.
Received: 16 November 2011; in revised form: 18 June 2012 / Accepted: 19 June 2012 / Published: 28 June 2012
Abstract:
Bioenergy is currently regarded as a renewable energy source with a high growth potential. Forest-based biodiesel, with the significant advantage of not competing with grain production on cultivated land, has been considered as a promising substitute for diesel fuel by many countries, including China. Consequently, extracting biodiesel from
Jatropha curcas has become a growing industry. However, many key issues related to the development of this industry are still not fully resolved and the prospects for this industry are complicated. The aim of this paper is to evaluate the net energy, CO
2 emission, and cost efficiency of
Jatropha biodiesel as a substitute fuel in China to help resolve some of the key issues by studying data from this region of China that is well suited to growing
Jatropha. Our results show that: (1)
Jatropha biodiesel is preferable for global warming mitigation over diesel fuel in terms of the carbon sink during
Jatropha tree growth. (2) The net energy yield of
Jatropha biodiesel is much lower than that of fossil fuel, induced by the high energy consumption during
Jatropha plantation establishment and the conversion from seed oil to diesel fuel step. Therefore, the energy efficiencies of the production of
Jatropha and its conversion to biodiesel need to be improved. (3) Due to current low profit and high risk in the study area, farmers have little incentive to continue or increase
Jatropha production. (4) It is necessary to provide more subsidies and preferential policies for
Jatropha plantations if this industry is to grow. It is also necessary for local government to set realistic objectives and make rational plans to choose proper sites for
Jatropha biodiesel development and the work reported here should assist that effort. Future research focused on breading high-yield varieties, development of efficient field management systems, and detailed studies lifecycle environmental impacts analysis is required to promote biologically and economically sustainable development of
Jatropha biodiesel and to assist government agencies in setting realistic objectives and appropriate and advantageous policies for the regions and the country.
Keywords: substitute energy; Jatropha curcas; biodiesel; net energy; CO2 emission; land suitability assessment; cost-benefit analysis
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Cite This Article
MDPI and ACS Style Deng, X.; Han, J.; Yin, F. Net Energy, CO2 Emission and Land-Based Cost-Benefit Analyses of Jatropha Biodiesel: A Case Study of the Panzhihua Region of Sichuan Province in China. Energies 2012, 5, 2150-2164.
AMA Style Deng X., Han J., Yin F. Net Energy, CO2 Emission and Land-Based Cost-Benefit Analyses of Jatropha Biodiesel: A Case Study of the Panzhihua Region of Sichuan Province in China. Energies. 2012; 5(7):2150-2164.
Chicago/Turabian Style Deng, Xiangzheng; Han, Jianzhi; Yin, Fang. 2012. "Net Energy, CO2 Emission and Land-Based Cost-Benefit Analyses of Jatropha Biodiesel: A Case Study of the Panzhihua Region of Sichuan Province in China." Energies 5, no. 7: 2150-2164.
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