Synthesis of higher alcohols from syngas over Cu-Co alloy catalyst in slurry reactor
LaCo0.7Cu0.3O3 was supported on SiO2according to the incipient wetness impregnation method combined with citrate complexing method.The prepared catalyst precursors were characterized by XRD, BET, H2-TPR and TEM.The catalytic performance for higher alcohols synthesis from syngas was conducted in a slurry reactor, which was compared with that in fixed-bed reactor.After reduction, the catalyst precursor favoured to form nanoparticles of Cu-Co alloy highly dispersed on SiO2and modified with La2O3.In slurry reactor, the selectivity to C2+OH was much higher, which may be attributed to the effect of liquid slurry of paraffin for suppressing the desorption of methanol and the formation of hot-spots.Under the experimental condition of 900to 1 500mL/ (gcat·h) , 3MPa, H2:CO:N2=8:4:1and 250℃, C2+OH in the total alcohols was more than 95％in weight.
CO hydrogenationhigher alcohols synthesisslurry reactorcopper-cobalt alloyperovskite-type oxide
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