The steam reforming of dimethyl ether (DME) (SR) to a hydrogen-rich gas over a mechanical mixture of WOx/ZrO2 (the DME hydration catalyst) and CuZnAlOx (the methanol SR catalyst) was studied. The mechanically mixed catalyst was shown to provide almost complete conversion of DME to the hydrogen-rich gas containing < 0.5 vol.% of CO at 300 degrees C, atmospheric pressure, gas hourly space velocity (GHSV) of 10000 h(-1) and molar ratio H2O/DME = 3. The hydrogen production rate in DME SR was found to reach 180-250 mmol H-2/(g(cat)center dot h) at 250-300 degrees C.