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Abstract
Dimethyl ether (DME) is manufactured from syngas using an indirect DME-synthesis method (two-step process), that consists of a methanol synthesis and dehydration process. The price of DME for this method depends on the methanol price; therefore, an economical process should be developed. A direct DME-synthesis method (one-step process) has been developed and the catalysts consist of methanol-synthesis catalysts and methanol-dehydration catalysts. Syngas, the raw material for DME, is produced from natural gas, coal and biomass for example. Currently, DME can be produced from biomass, so DME is in the spotlight as a potential biofuel. We have developed new catalysts and the Cu–Zn/Al2O3 catalysts prepared using the sol–gel methods, which are very effective for direct DME synthesis. Even if the raw gas is contaminated with oxygen, DME is effectively produced over these sol–gel catalysts. We hope that these catalysts will be widely used for economical DME synthesis from biomass, helping to solve environmental problems.
Financial & competing interests disclosure
The author has no relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript. This includes employment, consultancies, honoraria, stock ownership or options, expert testimony, grants or patents received or pending, or royalties.
No writing assistance was utilized in the production of this manuscript.