铜基催化剂结构对烯醛脂肪醇溶液吸附扩散性能的影响

doi:10.19964/j.issn.1006-4990.2023-0171

Abstract

Abstract:

The development of non chromium catalysts in the process of preparing 2-propylheptanol from aldehyde hydrogenation is the key to achieving the greening of the process.The adsorption and diffusion characteristics of the mixed solution of 2-propylheptenal and 2-propylheptanol for copper silicon，copper chromium，and copper zinc aluminum three different copper-based composite oxides were investigated by adsorption diffusion method.And combined the structural characteristics of three different copper-based composite oxides，it was coupled with the hydrogenation performance of 2-propylheptenal in liquid phase.The results showed that 2-propylheptaneal adsorbed preferentially by copper silicon composite oxides at all concentration ranges，however，for copper-zinc and copper-chromium composite oxides，2-propylheptaneal adsorbed preferentially only while the mass fraction of 2-propylheptenal in the mixed solution was higher than 4.6% and 4.1% respectively.The adsorption selectivity，diffusion coefficient，and hydrogenation performance for 2-propylheptylenal of copper chromium composite oxide were optimal in liquid phase.

Key words: unsaturated aldehydes, hydrogenation, copper-based catalyst structure, adsorption, diffusion

CLC Number:

TQ132.21

LIU Zenghui, SONG Bingjie, CHEN He, SUN Peiyong, CHAI Wenzheng, ZHANG Shenghong, FU Songbao, YAO Zhilong. Effect of structure of copper-based catalyst on adsorption and diffusion of mixed solution of unsaturated aldehydes and fatty alcohol[J]. Inorganic Chemicals Industry, 2023, 55(12): 152-158.

Figures/Tables 10

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催化剂	q_t /（g·g^-1）	q_m/（g·g^-1）	q_t /q_m	D_c/（cm²·s^-1）
CuO-SiO₂	0.33	0.47	0.70	3.96×10^-16
CuO-Cr₂O₃	0.15	0.21	0.71	8.43×10^-15
CuO-ZnO/Al₂O₃	0.22	0.28	0.78	3.33×10^-16

催化剂	PBA转化率/%	2-PH选择性/%
CuO-SiO₂	96.2	86.4
CuO-Cr₂O₃	99.8	99.7
CuO-ZnO/Al₂O₃	95.8	85.5

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Effect of structure of copper-based catalyst on adsorption and diffusion of mixed solution of unsaturated aldehydes and fatty alcohol

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