甲醇水相重整制氢原位还原糠醛制备糠醇

In-situ Reduction of Furfural to Furfuryl Alcohol with Hydrogen Derived from Aqueous-Phase Reforming of Methanol

基于在雷尼镍催化剂作用下,甲醇水相重整产氢和糠醛液相加氢两反应的反应条件(温度、压力、液相)相近,研究了不需要外部提供氢源的情况下,液相原位还原糠醛的可行性。通过反应温度、反应物配比和催化剂用量的优化实现了水相制氢与液相加氢二个反应较好的耦合,在反应温度120℃、反应压力0.8MPa和水、甲醇、糠醛的体积比为25:125:5的条件下,原位加氢产物糠醇的选择性优于传统的液相加氢还原法,为糠醛选择性加氢提供了一条新的技术路线。

Based on that the aqueous-phase reforming of methanol and liquid phase hydrogenation of furfural have similary reaction conditions (temperature, pressure and in the liquid phase) on the Raney Ni catalyst, liquid phase in-situ reduction of furfural with hydrogen from the aqueous-phase reforming of methanol were investigated. The combination of the two reactions (hydrogen production and hydrogenation) is optimized in terms of reaction temperature, the ratio of substrate, and the amount of catalyst. The in-situ hydrogenation furfural shows a higher selectivity for furfuryl alcohol than the traditional hydrogenation method with molecular H2 under the optimal conditions, i.e., 120 ℃, 0.8 MPa, and the volume ratio of H2O:CH3OH: C5H4O2 = 25:125:5. Thus it could provide a new route for the selective hydrogenation of furfural into furfuryl alcohol.