Improving ethanol production

Carnegie Mellon engineers devise new process to improve energy efficiency of ethanol production, Improving ethanol production

PITTSBURGH—.Carnegie Mellon University 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 U.S. energy supply.

Carnegie Mellon researchers have used advanced process design methods combined with mathematical optimization 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 ultimately 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 ."

For a long time, corn-based ethanol was considered a questionable energy resource. Today, 46 percent of the nation's gasoline contains some percentage of ethanol. And demand is driven by a federal mandate that 5 percent of the nation's gasoline supply – roughly 7.5 billion gallons – contain some ethanol by 2012.

Corn is most often used to produce ethanol, but it can be made from grains, sugar beats, potato and beverage wastes and switchgrass.

The research was conducted through the Chemical Engineering Department's Center of Advanced Process Decision-making in collaboration with Minneapolis-based Cargill, an international provider of food, agricultural and risk management services and products.

"As a result of the explosive growth of the U.S. fuel ethanol industry, we decided to collaborate with Professor Grossmann's team to verify how process synthesis tools could be applied to improve the production of ethanol from corn. The work done at Carnegie Mellon demonstrated the potential for considerable capital and energy cost savings in the corn to ethanol process. We look forward to the time when the tools developed by Carnegie Mellon researchers will become part of industry's new toolkit for making the process even more economical and sustainable," said Luca C. Zullo, technical director of Cargill Emissions Reduction Services. ###

In the United States, ethanol production began in the late 1980s with a handful of plants producing about 170 million gallons. More than 25 years later, the industry has 107 plants that produced more than 5 billion gallons last year.

Contact: Chriss Swaney swaney@andrew.cmu.edu 412-268-5776 Carnegie Mellon University

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Freedom Calendar 01/27/07 - 02/03/07

January 27, 1964, U.S. Senator Margaret Chase Smith (R-ME), first woman to be considered for nomination by a major party, announces candidacy for President; she finishes 2nd at Republican National Convention.

January 28, 1818, Birth of anti-slavery activist George Boutwell, a founder of Massachusetts Republican Party; later served in Congress and as U.S. Treasury Secretary.

January 29, 1981, Jeane Kirkpatrick appointed by President Ronald Reagan as first woman to be U.S. Ambassador to United Nations.

January 30, 2001, Republican Gale Norton, appointed by President George W. Bush, becomes first woman to serve as U.S. Secretary of the Interior.

January 31, 1865, 13th Amendment banning slavery passed by U.S. House with unanimous Republican support, intense Democrat opposition,

February 1, 1865, Chief Justice Salmon Chase swears in Republican John S. Rock, first African-American to be admitted to practice before U.S. Supreme Court.

February 2, 1856, After leaving Democratic Party because of its pro-slavery policies, U.S. Rep. Nathaniel Banks (R-MA) becomes first Republican Speaker of the U.S. House of Representatives.

February 3, 1870, After passing House with 98% Republican support and 97% Democrat opposition, Republicans’ 15th Amendment is ratified, granting vote to all Americans regardless of race.

"I do order and declare that all persons held as slaves within said designated States, and parts of States, are, and henceforward shall be free; and that the Executive government of the United States, including the military and naval authorities thereof, will recognize and maintain the freedom of said persons.”

Abraham Lincoln, 16th President of the United States

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