【摘要】 用共沉淀法制备了5种ZnCrREK氧化物催化剂,10MPa、360～420℃、5000h^-1反应条件下,低碳醇合成反应结果表明,REO助剂能提高合成气转化率和催化剂生成醇活性,对甲烷化可能有抑制作用,其中Dy₂O₃、Tb₄O₇、Pr₆O₁₁能促进链增长,提高异丁醇收率,在一定浓度范围内,以Dy₂O₃效果最佳。更多还原

【Abstract】 Zn-Cr oxide catalysts promoted with rare earth oxide （REO） were prepared by a coprecipitation procedure and the effects of REO (Nd₂O₃, LaCeO, Pr₆O₁₁, Tb₄O₇ Dy₂O₃) promoters on higher alcohols synthesis were investigated. The results indicate that the introduction of RE leads to the enhancement of syngas conversion and possible suppression of methanation, which are favourable to the increase of activity for alcohols. Moreover, the introduction of Dy₂O₃,Tb₄O₇,Pr₆O₁₁ can promote the chain growth and raise STY of i-butanol in varying degrees, and within a certain Dy concentration, Dy₂O₃ acts best among them.更多还原