摘要
Mo改性雷尼镍是葡萄糖加氢制备山梨醇工业中重要的催化剂。考察了不同Mo含量雷尼镍催化剂的葡萄糖加氢性能。结果表明,Mo改性雷尼镍催化剂的活性和稳定性得到大幅提高,探讨了Mo改性雷尼镍催化剂活性和稳定性提高的原因。Mo改性雷尼镍催化剂活性和稳定性提高的原因是改性催化剂中氧化态的Mo可以作为L酸吸附中心,有利于葡萄糖在催化剂上的吸附,从而提高催化剂活性;Mo的存在,减少了雷尼镍催化剂在反应过程中Al的流失量,是催化剂稳定性提高的主要原因。
Mo-modified Raney-Ni is an important catalyst for sorhitol production. Effects of Mo loadings on behaviors of Raney-Ni catalysts in glucose hydrogenation were investigated. The results indicated that catalytic activity and stability of Raney-Ni was remarkably enhanced after modification. The causes behind enhancement of the catalytic activity and stability by Mo modification of Raney nickel were discussed. It was concluded that oxidation state Mo as the adsorption centre of L acid was beneficial to the adsorption of glucose on the catalyst, thus the catalytic activity was enhanced ; the existence of Mo reduced the loss of Al in Raney Ni catalyst during the reaction and was the main reason of stability enhancement of the catalyst.
出处
《工业催化》
CAS
2010年第11期36-40,共5页
Industrial Catalysis
基金
浙江省自然科学基金(Y4080396)
关键词
催化化学
Mo改性
雷尼镍催化剂
葡萄糖加氢
山梨醇
catalytic chemistry
molybdenum modification
Raney nickel catalyst
glucose hydrogena tion
sorbitol
