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Biobutanol
Our Biobutanol, also known as n-butanol or butyl alcohol, is produced through the anaerobic fermentation of corn or biomass instead of traditional
chemical processes from petroleum-based feedstock.
We view Biobutanol as both an industrial solvent and a Biofuel:
Biobutanol as Industrial Solvent
Butanol is a widely used industrial chemical, primarily as an
industrial solvent. Other applications for butanol include
plasticizers, resins, paints, coatings, chemical intermediates
for herbicides and pharmaceuticals and food grade extractants.
We introduced biobutanol into the China market in 2008 to
address the growing China demand for butanol as an industrial
solvent and as a chemical intermediate. We currently produce
biobutanol from corn, and are actively working on
commercializing biomass as the feedstock.
Biobutanol as Biofuel
Beyond its traditional industrial applications, butanol is a promising biofuel candidate with more desireable fuel.
Similar to ethanol, butanol can be used as a gasoline blendstock. Butanol’s air-fuel ratio and
energy content are higher than ethanol’s, allowing butanol to be mixed in higher ratios with gasoline as
a drop-in car fuel blendstock. Butanol is less hygroscopic, or water absorbant, than ethanol. As a result,
butanol is less corrosive than ethanol as a gasoline blendstock and may be transported using existing oil
infrastructure including pipelines and tankers. Butanol has lower vapor pressure than ethanol, making it
a more viable fuel blendstock than ethanol in warmer regions where evaporative loss poses storage and
logistics issues for ethanol.
The following table summarizes key properties of butanol and ethanol relevant to their application
as gasoline blendstock:
|
Properties |
Butanol |
Ethanol |
|
Air to fuel mixture |
11.1 |
9 |
|
Energy content |
110 kBtu/gallon |
78 kBtu/gallon |
|
Corrosive solvent |
No |
Yes |
|
Transportation and distribution |
Existing distribution infrastructure |
Separate transportation distribution |
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Vapor pressure |
0.33 psi |
2 psi |
|
Standard car engine |
Higher blending concentration |
Lower blending concentration |
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