Uncertainty analysis in the life cycle assessment of cassava ethanol in China

Abstract In the context of China's severe energy and environmental problems, as an alternative vehicle fuel bioethanol is a promising choice because its theoretically renewable and carbon neutral. To guarantee grain security, China is developing non-grain fuel ethanol. Based on a life cycle assessment (LCA), this paper assesses the uncertainty of energy efficiency and environmental performance in the development of cassava ethanol of 1.5-generation bioethanol whose raw materials are non-staple crops. The results show that cassava ethanol is a good alternative vehicle fuel from the view of energy efficiency. From an environment perspective, global warming potential and photochemical ozone formation potential of cassava ethanol are better than gasoline, but acidification potential and respiratory inorganics inferior. The Monte Carlo simulation reveals cassava ethanol is feasible compared with gasoline in the case of uncertain variables. Among these uncertain variables, cassava yield, nitrogen fertilizer use, and steam use are the most important variables for energy efficiency and environmental performance of cassava ethanol. Furthermore, this study calculates the potentials for energy savings and emissions reduction with improving key aspects, and gives the suggestions of enhancing the performance of key indicators to promote the development of bioethanol vehicle fuel.

[1]  Jun Bi,et al.  Energy balance and GHG emissions of cassava-based fuel ethanol using different planting modes in China. , 2013 .

[2]  Tianzhu Zhang,et al.  Unintended consequences of bioethanol feedstock choice in China. , 2012, Bioresource technology.

[3]  Jerry D. Murphy,et al.  Beyond carbon and energy: The challenge in setting guidelines for life cycle assessment of biofuel systems , 2017 .

[4]  Frank Witlox,et al.  Bitter sweet: How sustainable is bio-ethanol production in Brazil? , 2012 .

[5]  Rahman Saidur,et al.  A review on boilers energy use, energy savings, and emissions reductions , 2017 .

[6]  Xinxing Pan,et al.  Environmental sustainability of bioethanol produced from sweet sorghum stem on saline-alkali land. , 2015, Bioresource technology.

[7]  J. Tao,et al.  Review of China’s bioethanol development and a case study of fuel supply, demand and distribution of bioethanol expansion by national application of E10 , 2011 .

[8]  Jingzheng Ren,et al.  Determining the life cycle energy efficiency of six biofuel systems in China: a Data Envelopment Analysis. , 2014, Bioresource technology.

[9]  Hongzhang Chen,et al.  Industrial technologies for bioethanol production from lignocellulosic biomass , 2016 .

[10]  Sheng Su,et al.  Investigation of tailpipe and evaporative emissions from China IV and Tier 2 passenger vehicles with different gasolines , 2017 .

[11]  Pomthong Malakul,et al.  Environmental life cycle assessment and social impacts of bioethanol production in Thailand , 2017 .

[12]  Xiaojun Hu,et al.  Energy for sustainable road transportation in China: Challenges, initiatives and policy implications , 2010 .

[13]  Ibrahim Dincer,et al.  Life cycle environmental impact assessments and comparisons of alternative fuels for clean vehicles , 2018 .

[14]  Gholamhassan Najafi,et al.  Performance and exhaust emissions of a gasoline engine with ethanol blended gasoline fuels using artificial neural network , 2009 .

[15]  Mustafa Canakci,et al.  The effect of different alcohol fuels on the performance, emission and combustion characteristics of a gasoline engine , 2014 .

[16]  Qun Chen,et al.  Life-cycle energy efficiency and environmental impacts of bioethanol production from sweet potato. , 2013, Bioresource technology.

[17]  Hao Cai,et al.  Life cycle assessment of fuel ethanol produced from soluble sugar in sweet sorghum stalks in North China , 2017 .

[18]  S. Gheewala,et al.  LCA of biofuels in Thailand using Thai Ecological Scarcity method , 2017 .

[19]  Barbara Ribeiro,et al.  Beyond commonplace biofuels: Social aspects of ethanol , 2013 .

[20]  Gjalt Huppes,et al.  Life cycle assessment and life cycle costing of bioethanol from sugarcane in Brazil , 2009 .

[21]  Xunmin Ou,et al.  Energy consumption and GHG emissions of six biofuel pathways by LCA in (the) People's Republic of China , 2009 .

[22]  Gholamhassan Najafi,et al.  Optimization of performance and exhaust emission parameters of a SI (spark ignition) engine with gasoline–ethanol blended fuels using response surface methodology , 2015 .

[23]  Hiroki Hondo,et al.  Effect of biogas utilization and plant co-location on life-cycle greenhouse gas emissions of cassava ethanol production , 2012 .

[24]  He Li,et al.  Energy efficiency and potentials of cassava fuel ethanol in Guangxi region of China. , 2006 .

[25]  Pomthong Malakul,et al.  Life-cycle energy and environmental analysis of bioethanol production from cassava in Thailand. , 2010, Bioresource technology.

[26]  Shabbir H. Gheewala,et al.  Life cycle assessment of fuel ethanol from cassava in Thailand , 2008 .

[27]  Xunmin Ou,et al.  Life-cycle greenhouse gas emission and energy use of bioethanol produced from corn stover in China: Current perspectives and future prospectives , 2016 .

[28]  Yi Yang,et al.  Life cycle freshwater ecotoxicity, human health cancer, and noncancer impacts of corn ethanol and gasoline in the U.S. , 2013 .

[29]  Bryant E. McDonnell,et al.  Monte Carlo analysis of life cycle energy consumption and greenhouse gas (GHG) emission for biodiesel production from trap grease , 2016 .

[30]  J. Wesseler,et al.  Energy and greenhouse gas balances of cassava-based ethanol , 2013 .

[31]  Suiran Yu,et al.  Simulation based life cycle assessment of airborne emissions of biomass-based ethanol products from different feedstock planting areas in China , 2009 .

[32]  Fredrich Kahrl,et al.  Greenhouse gas emissions from nitrogen fertilizer use in China , 2010 .

[33]  Gengqiang Pu,et al.  Life cycle inventory and energy analysis of cassava-based Fuel ethanol in China , 2008 .

[34]  Thomas D. Durbin,et al.  Impacts of ethanol fuel level on emissions of regulated and unregulated pollutants from a fleet of gasoline light-duty vehicles , 2012 .

[35]  Yafeng Han,et al.  Techno-economic evaluation of strategies for addressing energy and environmental challenges of industrial boilers in China , 2017 .

[36]  Günnur Koçar,et al.  Current and future aspects of bioethanol production and utilization in Turkey , 2018 .

[37]  Thumrongrut Mungcharoen,et al.  Life-Cycle GHG Emissions of Cassava-Based Bioethanol Production☆ , 2015 .

[38]  Chiuhsiang Joe Lin,et al.  Water footprint analysis of second-generation bioethanol in Taiwan , 2015 .

[39]  Yalin Lei,et al.  Policy options for non-grain bioethanol in China: Insights from an economy-energy-environment CGE model , 2017 .

[40]  Yu Chen,et al.  Thou shalt drive electric and hybrid vehicles: Scenario analysis on energy saving and emission mitigation for road transportation sector in China , 2013 .

[41]  M. Rastogi,et al.  Recent advances in second generation bioethanol production: An insight to pretreatment, saccharification and fermentation processes , 2017 .

[42]  Shabbir H. Gheewala,et al.  Material flow management and cleaner production of cassava processing for future food, feed and fuel in Thailand , 2016 .

[43]  H. Zabed,et al.  Bioethanol production from renewable sources: Current perspectives and technological progress , 2017 .

[44]  Zhang Mi,et al.  Impact of alcohol gasoline on fuel consumption and tailpipe emissions of a China IV passenger car , 2016, 2016 35th Chinese Control Conference (CCC).

[45]  Havva Balat,et al.  Recent trends in global production and utilization of bio-ethanol fuel , 2009 .

[46]  Jing Tao,et al.  Simulation-based life cycle assessment of energy efficiency of biomass-based ethanol fuel from different feedstocks in China. , 2009 .

[47]  Yuqing Su,et al.  An overview of biofuels policies and industrialization in the major biofuel producing countries , 2015 .

[48]  Cristina Trois,et al.  The potential of cassava biomass and applicable technologies for sustainable biogas production in South Africa: A review , 2014 .

[49]  Xiaoyu Yan,et al.  Life cycle analysis of energy use and greenhouse gas emissions for road transportation fuels in China , 2009 .

[50]  Xiaomin Xie,et al.  The policy recommendations on cassava ethanol in China: Analyzed from the perspective of life cycle “2E&W” , 2017 .

[51]  Scott Rozelle,et al.  Bioethanol development in China and the potential impacts on its agricultural economy , 2010 .

[52]  Ali Hasanbeigi,et al.  Moving beyond equipment and to systems optimization: techno-economic analysis of energy efficiency potentials in industrial steam systems in China , 2016 .

[53]  Gentela Jahnavi,et al.  Status of availability of lignocellulosic feed stocks in India: Biotechnological strategies involved in the production of Bioethanol , 2017 .

[54]  Liu Lei,et al.  Potential of cultivation capacity of cassava fuel ethanol in Southwest China and its effect on greenhouse gas emission reduction , 2013 .

[55]  Juan Gao,et al.  Life cycle assessment of common reed (Phragmites australis (Cav) Trin. ex Steud) cellulosic bioethanol in Jiangsu Province, China , 2016 .

[56]  K. Paustian,et al.  Impact of ecosystem carbon stock change on greenhouse gas emissions and carbon payback periods of cassava-based ethanol in Vietnam , 2017 .

[57]  Shabbir H. Gheewala,et al.  Supply chain analysis for cassava starch production: Cleaner production opportunities and benefits , 2017 .

[58]  S. Khanal,et al.  Biorefinery approach for cassava-based industrial wastes: Current status and opportunities. , 2016, Bioresource technology.

[59]  M. T. Moreira,et al.  Life cycle assessment of hemp hurds use in second generation ethanol production , 2012 .

[60]  Beibei Liu,et al.  Life cycle implication of the potential commercialization of stover-based E85 in China , 2012 .

[61]  Xunmin Ou,et al.  Life-cycle analysis on energy consumption and GHG emission intensities of alternative vehicle fuels in China , 2012 .

[62]  Yi Ji,et al.  Quantifying the fate and risk assessment of different antibiotics during wastewater treatment using a Monte Carlo simulation , 2017 .

[63]  Sergio Leal Braga,et al.  Potential of biofuels from algae: Comparison with fossil fuels, ethanol and biodiesel in Europe and Brazil through life cycle assessment (LCA) , 2017 .

[64]  Jing Tao,et al.  Energy efficiency assessment by life cycle simulation of cassava-based fuel ethanol for automotive use in Chinese Guangxi context , 2009 .

[65]  Yue‐Jun Zhang,et al.  Direct energy rebound effect for road passenger transport in China: A dynamic panel quantile regression approach , 2015 .

[66]  Fausto Freire,et al.  Addressing land use change and uncertainty in the life-cycle assessment of wheat-based bioethanol. , 2012 .

[67]  Nilgun Ciliz,et al.  Life cycle assessment and environmental life cycle costing analysis of lignocellulosic bioethanol as an alternative transportation fuel , 2016 .