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以Raney法研制了Cu-Zn-Al合金催化剂,并将其用于CO+H_2合成甲醇反应。考察了合金在固定床中的组成及浸析条件对催化剂组成的影响。反应条件的试验结果表明,在反应温度为270℃,压力为50—80kg/cm~2,原料气空速8000—16000h~(-1),H_2/CO为1.5—3.0的条件下,合金催化剂对合成甲醇反应具有较好的活性和稳定性。在270℃,50kg/cm~2压力下,时空收率可达2.0ml/ml cat·h,70kg/cm~2压力下为3.4ml/mlcat·h,在连续九天的稳定性试验中活性稳定。在三相床搅拌釜中连续九天的运转结果表明,合金催化剂具有良好的耐磨性。对催化剂物理化学性能作了初步测定,X-射线衍射结果证明,催化剂的活性组份为零价铜。
The Cu-Zn-Al alloy catalyst was prepared by Raney method and was used for the methanol synthesis reaction of CO + H_2. The effects of the composition of the alloy in the fixed bed and the leaching conditions on the catalyst composition were investigated. The experimental results of the reaction conditions show that under the conditions of a reaction temperature of 270 ℃, a pressure of 50-80kg / cm 2, a space velocity of 8000-16000h -1 and H 2 / CO of 1.5-3.0, The synthesis of methanol has good activity and stability. At 270 ℃ and 50kg / cm ~ 2, the space-time yield reached 2.0ml / ml cat · h and 3.4ml / mlcat · h under the pressure of 70kg / cm ~ 2, which was stable in the continuous nine-day stability test . The results of continuous operation in a three-phase bed stirred tank for nine days show that the alloy catalyst has good wear resistance. The physical and chemical properties of the catalyst were initially determined, X-ray diffraction results show that the active component of the catalyst is zero-valent copper.