BioDME 2nd Generation Biofuel

Biobased Dimethyl Ether

DME Fuel Properties

Properties

                BioDME is a fuel which is naturally in the gas phase.  Its boiling point is -23.6 °C, making it a gas at room temperature and atmospheric pressure.  Visually, DME is a colorless gas and clear at liquid phase.  Because DME is a gas at room temperatures, its transportation is dependent on cooling and pressurization.  However, the accepted practice of DME storage is at a pressure of 5 bar.  In regards to ignition, DME burns similarly to natural gas while being almost completely environmentally neutral.  When burned, it produces no greenhouse gases such as NOx and SOx.  It burns completely free of particulate matter and smoke.  Additionally, it causes no ozone depletion or negative impacts if leaked.  

 

Name

dimethyl ether, DME

Molecular formula

CH3OCH3 

CAS number

115-10-6

Appearance

Colorless gas

Molecular weight

46.07 g/mol

Density

1.97 g/L gas

Density

668 kg/m3 liquid

Gas specific gravity

1.59

Ignition Temperature

350 °C

Melting point

-138.5 °C

Boiling point

-23.6 °C

Cetane rating*

57



*Cetane rating refers to the numeric representation of a fuel’s ignition delay.  This is the time between the start of injection and the initial pressure increase due to combustion.  The higher the cetane number, the more efficiently the fuel ignites.  Diesel has a cetane rating of roughly 40.               

 

 

 

 

 

 

 

 

 

 

Another biofuel which is close to commercialization is biobutanol