甲醇合成铜基催化剂的焙烧与压制工艺

Roasting and pressing technology of copper-based catalyst for methanol synthesis

研究了甲醇合成铜基催化剂的焙烧、压制工艺。焙烧结果表明：在工业连续加热炉中按实验中最佳升温模式制备的催化剂,比表面积较高,氧化铜和氧化锌的相互分散程度较高,晶粒粒径适当;三氧化二铝在催化剂中有抗烧结的作用;采用干法造粒后,在250~830μm的粉料中掺混质量分数为10%的120~250μm的粉料,压制成型,使造粒效率提高约10%。压制结果表明：用25MPa的表压制块时,250~830μm和120~250μm粉料所占比例较高。采用2MPa表压成型时,试样的抗压强度较高,密度适中。自制催化剂的宏观和微观形貌均与ICI51-7工业催化剂相似。

The roasting and pressing process of copper-based catalyst for methanol synthesis was stud- ied in this paper. The results showed that：the catalyst prepared by the best temperature rising process had a higher surface area ratio and the copper oxide and zinc oxide were dispersed better,particle size was more appropriate. The effect of anti-sintering of aluminum oxide in the catalyst was found. Higher granulation efficiency was found by blending 10% powder of 120~250μm to 250~830 μm and the ef- ficiency was improved by about 10 %. Pressing results showed that. under 25 MPa of gauge pressure, the proportion of 120~250μm and 250~830μm power was higher. The higher compressive strength of the sample and moderate density were found when power was pressed with 2 MPa of gauge pres- sure. Macroscopic and microscopic morphology of homemade catalysts were similar to industrial cata- lyst ICI51-7.