Load Of Cu / Tio <sub> 2 </ Sub> - Catalyst

TiO2-supported Cu catalyst had been used in CO-NO,CO2 hydrogenation, etc. TiO2 commonly exists in two crystalline forms and there are interaction between Cu and TiO2, which makes TiO2 difference from SiO: and A12O3 as supporter. TiO2 has the effects on the performance of the catalyst. It is well known that metal Cu has good performance in hydrogenation reactions. With the development of catalyst science , the selectivity of the catalyst becomes more and more important. Realizing partial hydrogenation can make full use of the resources. In this paper, the performance Cu/TiO; samples were studied in order to realize well-environment process in hydrogenation of furfural to furfuryl alcohol and use non-noble metal to replace noble metal in ethene hydroformylation to propanal. The following important results were obtained:1. Gas phase hydrogenation of furfural was investigated under atmospheric pressure on Cu/TiO2 catalyst. Effects of different reaction conditions, Cu contents and promoters on the activity and selectivity of the catalyst were discussed. Results showed that the conversion of furfural was more than 98% and the selectivity of furfuryl alcohol was more than 99% over the potassium-promoted catalyst at 160癈, H2/furfural ratio as 1:8.The activity and selectivity of Cu-K/TiO2 catalyst are approximately as the same as Cu-Cr catalyst.2. Adding the second component Ni alternated the performance of Cu/TiO2 catalyst. With the variation of Cu/Ni, the catalyst with high Ni raletive content had the strong ability of hydrogenation, while the catalyst with high Cu raletive content was in favor of ethene hydroformylation reaction.3. Physicochemical property of catalyst had been studied by TPR,XRD,XPS and BET. The results of BET indicated that Ti02 surface area decreased after supporting Cu, but increasedafter supporting Ni. TPR determination showed that there were interactions between Cu and TiO2 or Cu and Ni. The analysis of XPS indicated that K was rich on the surface of the catalyst after reduced, so it increased the activity and selectivity of the catalyst. Effect of variation of Cu/Ni on the catalyst was due to the different states and quantities of Cu and Ni on the catalyst furface.