[Carbon balance analysis of corn fuel ethanol life cycle].
The quantity of greenhouse gas emissions (net carbon emissions) of corn-based fuel ethanol, which is known as an alternative for fossil fuel is an important criteria for evaluating its sustainability. The methodology of carbon balance analysis for fuel ethanol from corn was developed based on principles of life cycle analysis. For the production state of fuel ethanol from summer corn in China, carbon budgets in overall life cycle of the ethanol were evaluated and its main influence factors were identified. It presents that corn-based fuel ethanol has no obvious reduction of carbon emissions than gasoline, and potential improvement in carbon emission of the life cycle of corn ethanol could be achieved by reducing the nitrogen fertilizer and irrigation electricity used in the corn farming and energy consumption in the ethanol conversion process.
Zhang
Zhi-shan
ZS
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
Yuan
Xi-gang
XG
D002244:Carbon / Q000032:analysis*; D004736:Energy-Generating Resources; D000431:Ethanol / Q000032:analysis*; D005579:Fossil Fuels / Q000032:analysis; D005742:Gasoline / Q000032:analysis; D018986:Motor Vehicles; D003313:Zea mays / Q000737:chemistry*
D005579:Fossil Fuels; D005742:Gasoline; D000431:Ethanol; D002244:Carbon