A Hybrid Life-Cycle Assessment of Nonrenewable Energy and Greenhouse-Gas Emissions of a Village-Level Biomass Gasification Project in China

Small-scale bio-energy projects have been launched in rural areas of China and are considered as alternatives to fossil-fuel energy. However, energetic and environmental evaluation of these projects has rarely been carried out, though it is necessary for their long-term development. A village-level biomass gasification project provides an example. A hybrid life-cycle assessment (LCA) of its total nonrenewable energy (NE) cost and associated greenhouse gas (GHG) emissions is presented in this paper. The results show that the total energy cost for one joule of biomass gas output from the project is 2.93 J, of which 0.89 J is from nonrenewable energy, and the related GHG emission cost is 1.17 × 10 −4 g CO 2 -eq over its designed life cycle of 20 years. To provide equivalent effective calorific value for cooking work, the utilization of one joule of biomass gas will lead to more life cycle NE cost by 0.07 J and more GHG emissions by 8.92 × 10 −5 g CO 2 -eq compared to natural gas taking into consideration of the difference in combustion efficiency and calorific value. The small-scale bio-energy project has fallen into dilemma, i.e. , struggling for survival, and for a more successful future development of village-level gasification projects, much effort is needed to tide over the plight of its development, such as high cost and low efficiency caused by decentralized construction, technical shortcomings and low utilization rate of by-products.

[1]  A. V. Bridgwater.  An assessment of the possibilities for transfer of European biomass gasification technology to China , 1999 .

[2]  Wei Lu,et al.  Life-cycle implications of using crop residues for various energy demands in China. , 2010, Environmental science & technology.

[3]  Clark W. Bullard,et al.  Net energy analysis : handbook for combining process and input-output analysis , 1976 .

[4]  Yongchun Zhao,et al.  Nonrenewable energy cost and greenhouse gas emissions of a 1.5 MW solar power tower plant in China , 2011 .

[5]  E. Hertwich,et al.  CO2 emissions from biomass combustion for bioenergy: atmospheric decay and contribution to global warming , 2011 .

[6]  G. Q. Chen,et al.  Renewability of wind power in China: A case study of nonrenewable energy cost and greenhouse gas emission by a plant in Guangxi , 2011 .

[7]  Qing Yang,et al.  Nonrenewable energy cost of corn-ethanol in China. , 2012 .

[8]  Gao Chun-yu.  Current Situation,Existing Problems and Countermeasures of Straw Gasification and Gas Centralized Supply in China , 2010 .

[9]  Jingyi Han,et al.  Small-scale bioenergy projects in rural China: Lessons to be learnt , 2008 .

[10]  Valerio Lo Brano,et al.  Energy performances and life cycle assessment of an Italian wind farm , 2008 .

[11]  S. Prasertsan,et al.  Biomass and biogas energy in Thailand: Potential, opportunity and barriers , 2006 .

[12]  Jifeng Li,et al.  Quantitative calculation of eco-tourist's landscape perception: Strength, and spatial variation within ecotourism destination , 2012, Ecol. Informatics.

[13]  T. Callaghan,et al.  Biomass as Fuel. , 1982 .

[14]  Eric Williams,et al.  Energy intensity of computer manufacturing: hybrid assessment combining process and economic input-output methods. , 2004, Environmental science & technology.

[15]  Guoqian Chen,et al.  Carbon emissions and resources use by Chinese economy 2007: A 135-sector inventory and input–output embodiment , 2010 .

[16]  B. Bakshi,et al.  Emergy analysis using US economic input–output models with applications to life cycles of gasoline and corn ethanol , 2010 .

[17]  C. Wang,et al.  Life cycle assessment of carbon emission from a household biogas digester : Implications for policy , 2012 .

[18]  Dennis Y.C. Leung,et al.  A review on the development and commercialization of biomass gasification technologies in China , 2004 .

[19]  B. W. Vigon,et al.  Life-cycle assessment : inventory guidelines and principles , 1994 .

[20]  Mark A. J. Huijbregts,et al.  Choices in calculating life cycle emissions of carbon containing gases associated with forest derived biofuels , 2003 .

[21]  Christopher J. Koroneos,et al.  HYDROGEN PRODUCTION VIA BIOMASS GASIFICATION-A LIFE CYCLE ASSESSMENT APPROACH , 2008 .

[22]  Fredrich Kahrl,et al.  Large or small? Rethinking China's forest bioenergy policies , 2013 .

[23]  Thomas H Christensen,et al.  C balance, carbon dioxide emissions and global warming potentials in LCA-modelling of waste management systems , 2009, Waste management & research : the journal of the International Solid Wastes and Public Cleansing Association, ISWA.

[24]  Andrea Corti,et al.  Life cycle assessment (LCA) of an integrated biomass gasification combined cycle IBGCC with CO2 removal , 2005 .

[25]  Zhang DaLei,et al.  The research and utilization on biomass gasification , 2008 .

[26]  Shangwu Gao,et al.  Rural energy and fuel forests in China , 1991 .

[27]  Bo Song,et al.  Carbon emission reduction potential of a typical household biogas system in rural China , 2013 .

[28]  Huang Ning-sheng.  Rural Biogas Development and Greenhouse Gas Emission Mitigation , 2008 .

[29]  Gjalt Huppes,et al.  System boundary selection in life-cycle inventories using hybrid approaches. , 2004, Environmental science & technology.

[30]  Vladislovas Katinas,et al.  Promotional policy and perspectives of usage renewable energy in Lithuania , 2006 .

[31]  Michael Obersteiner,et al.  Fixing a Critical Climate Accounting Error , 2009, Science.

[32]  Pei Zhai,et al.  Dynamic hybrid life cycle assessment of energy and carbon of multicrystalline silicon photovoltaic systems. , 2010, Environmental science & technology.

[33]  C. Hendrickson,et al.  Using input-output analysis to estimate economy-wide discharges , 1995 .

[34]  Pål Börjesson,et al.  Agricultural crop-based biofuels – resource efficiency and environmental performance including direct land use changes , 2011 .

[35]  Jing Meng,et al.  Renewable resource for agricultural ecosystem in China: Ecological benefit for biogas by-product for planting , 2012, Ecol. Informatics.

[36]  Arpad Horvath,et al.  Economic Input–Output Models for Environmental Life-Cycle Assessment , 1998 .

[37]  Matteo Carpentieri,et al.  Life Cycle Assessment ( LCA ) of an Integrated Biomass Gasification Combined Cycle ( IBGCC ) with CO 2 removal , 2003 .

[38]  Liu Ye-zhi.  Environmental Benefits Evaluation of Energy Greenhouse Gas Emission Reduction of Using Household Biogas , 2009 .