CuZnAl slurry catalysts were prepared from the solution of these metal salts by a complete liquid phase technology and used directly for single-step synthesis of dimethyl ether (DME) from syngas.The effects of technological parameters including reaction temperature
pressure
rotator speed
inlet H2/CO molar ratio in feed gas
as well as the ratios of components in catalyst were studied systematically.It was found that during raising and reducing temperature the activity of CuZnAl slurry catalysts could keep stability
even increased with increase of reaction time.Both conversion of CO and DME yield increased with raising pressure from 2.5 MPa to 5.5 MPa
while the selectivity of DME changed little.The water-gas shift reaction over CuZnAl slurry catalysts proceeded very fast.Among the catalysts investigated in this work
the CuZnAl slurry catalyst with molar ratio of 1∶1∶2.09 was the best one.