GASOHOL - DOES IT OR DOESNT IT PRODUCE POSITIVE NET ENERGY

被引:80
作者
CHAMBERS, RS [1 ]
HERENDEEN, RA [1 ]
JOYCE, JJ [1 ]
PENNER, PS [1 ]
机构
[1] UNIV ILLINOIS,OFF VICE CHANCELLOR RES,ENERGY RES GRP,URBANA,IL 61801
关键词
D O I
10.1126/science.206.4420.789
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 [理学]; 0710 [生物学]; 09 [农学];
摘要
A detailed analysis of energy inputs and outputs is performed on grain-based gasohol (10 percent grain-based ethanol, 90 percent gasoline). Existing differences of opinion on the energy balance derive mainly from variations in interpretation which are several examples of inherent methodological problems in energy analysis. The result is strongly dependent on assumptions about use of crop residues for fuel and the miles-per-gallon rating of gasohol. In terms of total nonrenewable energy, gasohol is close to the energy break-even point. On the other hand, in terms of petroleum or petroleum-substitutable energy, gasohol is an unambiguous energy producer, since most energy inputs to the process can be supplied by nonpetroleum sources such as coal. Copyright © 1979 AAAS.
引用
收藏
页码:789 / 795
页数:7
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