DuPont Biofuels:Building a Sustainable

Future

September 27, 2007

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September 27, 2007

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© 2007E.I. du Pont de Nemours and Company. All Rights Reserved.

BiofuelsDifferentiated

Products

Cellulose

Starch

Biobutanol

Sugar

SeedCrop

ProtectionCO2

Ethanol

Bio-PDOTM

Biochemicals

PlantFeedstocks

BiofuelsBiochemical

s

Fermentation

ProcessesAgricultural

InputsConversion to Sugars

DuPont Biorefinery Value Chain Carbohydrates to Chemicals and Biofuels

Leveraging Relationships and Expertise Along the Value Chain

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© 2007E.I. du Pont de Nemours and Company. All Rights Reserved.

Biofuels Global Market Perspective

BIOFUEL PRODUCTIONPRODUCTION COST

FEEDSTOCK AVAILABILITY

TERMINAL

FUEL STABILITYREFINERY

BLEND FLEXIBILITY

Current Biofuel Challenges:

RETAIL / AUTO INDUSTRY / CONSUMERFUEL EFFICIENCY – MPG

VEHICLE MODIFICATIONSINFRASTRUCTURE MODIFICATIONS

PIPELINE COMPATIBILITY

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© 2007E.I. du Pont de Nemours and Company. All Rights Reserved.

Seed/Crop Protection Solutions

Cellulosic Ethanol Production

Advanced Biofuels with Improved Performance

Improving corn bushels per acre and ethanol gallons per bushel

Developing and supplying new technologies to allow conversion of cellulose to biofuels

Biofuels Sustainability: DuPont’s 3 Targeted Solutions

Supplementing ethanol by developing and supplying next generation biofuels with improved performance

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© 2007E.I. du Pont de Nemours and Company. All Rights Reserved.

Uses existing biofuels value chainIs easily added to gasoline used in

existing vehicles Is added to the fungible fuel pool using

existing infrastructure to enhance sustainable growth

Is used in reasonable blend concentrations and requires no compromise in fuel specifications

Offers good value to consumers without performance compromise

Enhances the use of incumbent biofuels

Advanced Biofuels – Preferred Attributes Infrastructure Challenges and Opportunities

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© 2007E.I. du Pont de Nemours and Company. All Rights Reserved.

RENEWABLEFEEDSTOCKS

WORLDWIDE FUEL

MARKETS

• Powerful partnership• Shared commitment• Global reach • Complementary capabilities

Biobutanol: Next Generation Biofuel

DuPont & BP

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© 2007E.I. du Pont de Nemours and Company. All Rights Reserved.

BIOFUEL VALUE CHAIN TERMINALREFINERY

RETAIL / AUTO INDUSTRY / CONSUMER

PIPELINE

• BETTER FUEL CONSUMPTION• POTENTIAL FOR HIGHER BLEND LEVELS WITHOUT VEHICLE MODIFICATION• LOW VAPOR PRESSURE ALLOWS FOR POTENTIAL INCREASE IN ETHANOL BLENDING• PROMOTES USE OF EXISITING RETAIL PUMPS AND STORAGE

• LIMITED WATER ABSORPTION• FUNGIBLE BLENDING COMPONENT• LOWER VAPOR PRESSURE AIDS REFINERS• LESS CORROSIVE • UTILIZE EXISTING INFRASTRUCTURE

• SAME AGRICULTURAL FEEDSTOCKS • UTILIZE ETHANOL PRODUCTION ASSETS

Biobutanol: Provides Greater Options for Sustainable Renewable Fuels

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© 2007E.I. du Pont de Nemours and Company. All Rights Reserved.

Images: www.ca.uky.edu & www.nativeaccess.com0

391 Gal/Acre

155 Gal/Acre

40 Gal/Acre

at 50%removal

rate

310 Gal/Acre

Cellulosic Ethanol Production

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© 2007E.I. du Pont de Nemours and Company. All Rights Reserved.

Feedstock‘One Pass’

Harvest

ConversionConversion• PretreatmentPretreatment• Enzyme Saccharification Enzyme Saccharification Cob

Handling, Storage,Drying, & Transport FermentationFermentation

Production & Production & SeparationSeparation

DownstreamMarkets

Same as ethanolSame as ethanolFeedstockProduction

Government Support• National Energy Agenda• Incentives & Funding

Cellulosic Ethanol Infrastructure Issues

Cellulosic biomass to the plant gate :• On-farm collection systems• Moisture issues• Storage• Transportation• Increasing yields / efficiencies

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© 2007E.I. du Pont de Nemours and Company. All Rights Reserved.

Why Cobs? 12-25% of the above ground stover 2 times the bulk density of stover 16% more carbohydrate than stover alone

Collection options – one pass Separate or Grain/cob co-mingled “CCM”

Separation options On farm processing Off-site processing

Transportation and Storage options Future Visions

Corn Cob Collection / ProcessingBuild on existing grain harvest systemBuild on existing grain harvest system

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© 2007E.I. du Pont de Nemours and Company. All Rights Reserved.

DuPont Biofuels - Development Milestones

2007

Seed & Crop Protection Solutions • Best Corn Hybrids – Ethanol Yield (now)

• Direct processor – farmer connection (now)• Increased Ethanol – other options (in development)

Biobutanol • Biobutanol market development launch in UK (2007)

• UK Development Plant (2009)• Biobutanol Sales (2010+)

Cellulosic Fuels• Demonstration Plant (2008)

• Commercial Plant startup (by 2012)

2012

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© 2007E.I. du Pont de Nemours and Company. All Rights Reserved.

The Biotechnology OpportunityThe Biotechnology Opportunity

Meeting Food, Feed, Fuel, Materials Needs in a Safe, Sustainable Manner

Thank you