草酸二甲酯加氢制乙二醇催化剂失活研究:硫中毒  

Deactivation of Cu/SiO_2 catalyst for hydrogenation of dimethyl oxalate to ethylene glycol: sulfur poisoning

作　　者：张博[1] 计扬 骆念军 李伟[1] 房鼎业[1] 

机构地区：[1]华东理工大学化学工程国家重点实验室,上海200237 [2]上海浦景化工技术有限公司,上海200231

出　　处：《天然气化工—C1化学与化工》2012年第3期39-43,共5页Natural Gas Chemical Industry

摘　　要：在DMO加氢制乙二醇过程中,Cu/SiO2催化剂出现了失活现象,通过采用低温氮气吸附、XRD、TEM、XRF及EDS表征对失活前后催化剂进行表征,发现催化剂失活是由于硫中毒。Cu/SiO2催化剂对硫很敏感,容易硫中毒,且其耐硫性比甲醇合成Cu/ZnO/Al2O3催化剂差。加氢Cu/SiO2催化剂硫中毒失活是一个快速的过程,含微量硫的原料反应90 h后,乙二醇收率降至5.67%。In hydrogenation of dimethyl oxalate （DMO） to ethylene glycol （EG） over Cu/SiO2, catalyst deactivation was observed. The fresh and deactivated catalyst samples were characterized by N2-physisorption, X-ray diffraction, transmission electron microscopy, energy dispersive spectroscopy and X-ray fluorescence, and it was concluded that catalyst deactivation was due to sulfur poisoning. Cu/SiO2 catalysts employed in hydrogenation of DMO to EG were very sensitive to sulfur, and sulfur tolerances of them were lower than methanol synthesis catalysts （Cu/ZnO/Al2O3）. Sulfur poisoning was rapid, and trace amounts of sulfur in feedstock could reduce EG yield to only 5.67% in 90 hours.

关 键 词：CU/SIO2 加氢催化剂 失活 硫中毒 草酸二甲酯 乙二醇 

分 类 号：O643[理学—物理化学]