The Energy Balance of Corn Ethanol: An Update

By H. Shapouri, J. Duffield, Michael Q. Wang. 2002

539 citations recorded by the source corpus.

Subfields: Ecology, Environmental Engineering, Global and Planetary Change

View Paper: https://www.semanticscholar.org/paper/db3fdfde2baffce941c503c0011f58a6df887d49

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Ecology

In Environmental Engineering

In Global and Planetary Change

Citations in the corpus

Growing fuel: a sustainability assessment of willow biomass crops (2004, background): “In contrast, the net energy ratio for ethanol produced from corn is 1:1.3 (Shapouri et al. 2002) and 1:0.4 for electricity generated from coal and natural gas (Mann and Spath 1999).”
Sixty Billion Gallons by 2030: Economic and Agricultural Impacts of Ethanol and Biodiesel Expansion (2007, background): “Several studies have addressed various aspects bioenergy production and contribution toward renewable energy (USDA-OCE, 2002; Urbanchuk, 2001; Shapouri, Duffield, and Wang, 2002; Sheehan 2002; Walsh et al, 2003; McLaughlin et al, 2002).”
Ethanol as Fuel: Energy, Carbon Dioxide Balances, and Ecological Footprint (2005, methodology): “Its production has increased significantly, from 76 × 106 liters in 1979 to 6.4 × 109 liters in 2001 (Shapouri et al. 2002a).”
Stimulating the use of biofuels in the European Union: Implications for climate change policy (2006, background): “The final accounting is country-specific and is a function of the raw material cultivated, the utilisation of by- and co-products (for example, credits are given to the use of by-products as animal feedstuffs and fuel in the production process), and the agricultural yield (Henke et al., 2003; Shapou”
Land and water requirements of biofuel and implications for food supply and the environment in China (2009, background): “Secondary inputs such as energy required to build ethanol facilities, farm vehicles and transportation equipments are extremely difficult to quantify and hence are generally ignored (Shapouri et al., 2002).”
Understanding the reductions in US corn ethanol production costs: an experience curve approach (2009, methodology): “The USDA has conducted three cost-of-production surveys (i.e. Kane and Reilly, 1989; Shapouri et al., 2002b; Shapouri and Gallagher, 2005), which provide representative industry average production costs.”
Renewability and life-cycle energy efficiency of bioethanol and bio-ethyl tertiary butyl ether (bioETBE): Assessing the implications of allocation (2006, methodology): “The choice and justification of allocation procedures is a major issue for life cycle assessment [31], especially since they can have a significant influence on subsequent results [6,7,35, 36 ,49,50].”
Life-cycle assessment of net greenhouse-gas flux for bioenergy cropping systems. (2007, background): “The CFC for corn grain was calculated to be 293.3 CO2e-C/L ethanol (Shapouri et al. 2002) and for soybean grain was 132.4 CO2e-C/L biodiesel (Sheehan et al. 1998).”
Life cycle assessment of bioenergy systems: state of the art and future challenges. (2011, background): “The energy balances and savings of the most common biofuel systems can be found in (Quirin et al., 2004; Shapouri et al., 2002), while ranges on biomass for heat and power production are available in (Cherubini et al.”
Ethanol Fuels: Energy Balance, Economics, and Environmental Impacts Are Negative (2003, methodology): “Based on the optimistic use of data, the USDA report states that the total inputs amount to 75% of the ethanol output (Shapouri, Duffield, and Wang, 2002).”
Opportunities for renewable bioenergy using microorganisms. (2008, background): “When all energy costs to produce the corn and convert it to ethanol fuel are considered, experts estimate that � 90% of the energy output in bioethanol from corn is lost in the processes required to make it (Giampietro and Mayumi, 2007; Shapouri et al., 2001 ).”
Energy- and greenhouse gas-based LCA of biofuel and bioenergy systems: Key issues, ranges and recommendations (2009, background): “For example, most studes have concluded that corn-based ethanol used as transportation iofuel to displace petroleum-derived fuels will reduce greenhouse as emissions (Kim and Dale, 2002; Shapouri et al., 2002; Punter t al., 2004), while two studies by Pimentel have reported that he input energy for ”