Improving ethanol production

chemical engineers have devised a new process that can improve the efficiency of ethanol production, a major component in making biofuels a significant part of the

energy supply.

Carnegie Mellon researchers say they have used advanced process design methods combined with mathematical optimisation techniques to reduce the operating costs of corn-based bio-ethanol plants by more than 60 percent.

The key to the Carnegie Mellon strategy involves redesigning the distillation process by using a multi-column system together with a network for energy recovery that reduces the consumption of steam, a major energy component in the production of corn-based ethanol.

‘This new design reduces the manufacturing cost for producing ethanol by 11 percent, from $1.61 a gallon to $1.43 a gallon,'’ said Chemical Engineering Professor Ignacio E. Grossmann, who completed the research with graduate students Ramkumar Karuppiah, Andreas Peschel and Mariano Martin. ‘This research also is an important step in making the production of ethanol more energy efficient and economical.'’