摘要
应用原位红外光谱的方法，在反应现场条件下，研究了促进型甲酸甲酯（ＭＦ）氢解制甲醇铜铬催化剂上的化学吸附物种．结果表明，在ＭＦ氢解反应条件下，工作态催化剂上主要的化学吸附物种和反应中间物种是ＣＨ３Ｏ－ＣＨＯ…Ｈ－Ｏ（ａ）（１７５１，２７３０，１４５５ｃｍ－１）、ＣＨ３Ｏ－ＣＨＯ…Ｃｕ＋（ａ）（１６５４，２７３０，１４５５ｃｍ－１）、ＣＨ３Ｏ－ＣＨＯ…Ｃｒ３＋（ａ）（１５５２，２７３０，１４４５ｃｍ－１）和ＯＣＨ３（３０１２，２９４６，１４５５ｃｍ－１）．结合对该催化剂活性位本质的探讨，推断了甲酸甲酯氢解制甲醇的主要反应途径．
Chemisorbed species on the promoted Cu Cr catalysts for hydrogenolysis of methylformate to methanol were investigated by means of an in situ FTIR spectroscopy under the actual reaction conditions. The results indicated that the detectable chemisorbed species and intermediates on the functioning catalyst included:CH 3 O-CH=O…H O (a) (1 751,2 730,1 455 cm 1 ),CH 3O-CH=O…Cu +(a)(1 654,2 730 ,1 455 cm 1 ), CH 3O-CH=O…Cr 3+ (a) ( 1 552 , 2 730 ,1 445 cm 1 ) and O CH 3 (3 012, 2 946, 1 455 cm -1 ).Based upon these results above,the mechanism for hydrogenolysis of MF to methanol over the Cu Cr based catalysts has been suggested.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
1997年第5期717-722,共6页
Journal of Xiamen University：Natural Science
基金
国家自然科学基金
国家教委博士点基金
关键词
甲酸甲酯
氢解
甲醇
铜基催化剂
制备
吸附物种
In situ FTIR
Hydrogenolysis of methyl formate
Methanol
Promoted Cu Cr catalyst
