Energy and precious fuels requirements of fuel alcohol production. Volume II. Appendices A and B: ethanol from grain

Technical Report · Wed Dec 01 04:00:00 EST 1982

DOI:https://doi.org/10.2172/6107439· OSTI ID:6107439

Weinblatt, H.; Reddy, T. S.; Turhollow, A. Jr.

In this study, energy requirements for producing alcohol fuels are estimated and are compared to the energy content of the alcohol produced. The comparisons are developed for three alcohol production alternatives: ethanol from grain, methanol from cellulose, and methanol from coal. Information on the energy requirements of ethanol from grain is presented in these appendices. In Appendix A, two sets of estimates of energy requirements for grain production are developed. The first is a set of estimates for average energy requirements for current production of five grains (corn, grain sorghum, winter wheat, barley and oats). The second is an estimate of the increase in energy consumption which will occur if production of two of these grains (corn and grain sorghum) is increased so that they can be used as ethanol feedstocks while production of soybeans is decreasd (as a result of the availability of high-protein feed by-products of the ethanol process). Energy credits for by-products and land availability are also discussed. Processes for the conversion of grain to ethanol are generally divided into those that use dry milling and those that use wet milling. In Appendix B, both dry milling and wet milling technologies are considered. There are many variations possible upon these two major approaches, and the sensitivity to some of these variations is explored. In general, the wet milling processes consume slightly less energy per gallon ethanol than dry milling processes. The wet milling processes also require higher investment and produce more co-products along with the ethanol. (DMC)

• Research Organization: Faucett (Jack) Associates, Inc., Chevy Chase, MD (USA); Battelle Columbus Labs., OH (USA); Iowa State Univ. of Science and Technology, Ames (USA). Center for Agricultural and Rural Development
• DOE Contract Number: AI01-81CS50006
• OSTI ID: 6107439
• Report Number(s): DOE/NASA/0292-1-Vol.2; NASA-CR-168091-Vol.2; JACKFAU-82-299-Vol.2; ON: DE83014583
• Country of Publication: United States
• Language: English

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