China has developed a large DME production base, which reportedly amounts to almost 9 million tons per annum in installed DME capacity. Worldwide DME production grew from 100,000-150,000 tons per annum in the 1990s to some 200,000 tons in the mid-2000s. Potential future uses of DME include an alternative automotive fuel, a substitute for other fuels in power generation and in the household and a source of hydrogen for fuel cells. DME has replaced CFC gases (freons) as an environmentally friendly and safe aerosol propellant, which is one of its major current applications. DME can be produced from natural gas-providing an alternative way of its utilization, in competition to such technologies as Fischer-Tropsch synthetic fuels-as well as from other carbon-containing feedstocks, including coal and various types of biomass. Emissions of CO and HC which may increase with DME can be easily controlled by an oxidation catalyst.ĭimethyl ether (DME) is the simplest ether, consisting of two methyl groups bonded to a central oxygen atom, as expressed by its chemical formula CH 3-O-CH 3, Figure 1. When used as a diesel fuel, DME offers PM and NOx emission benefits. Specifications for fuel-grade DME have been issued by the ISO and by several national standard bodies. Abstract: Dimethyl ether (DME) can be made from a variety of fossil feedstocks including natural gas and coal as well as from renewable biomass.
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