4. Conclusion
In this work, the in situ hydrogenation of phenol to stable oxygenated organics was conducted over Raney Ni and zeolite solid acids. The effect of zeolite solid acids was discussed and the catalytic activities were compared. The conversion of phenol increased with the addition of zeolite solid acids, which indicated that zeolite solid acids could enhance the catalytic activity. And in these tested zeolite solid acids, Hbeta (Si/ Al = 60) was much better than others for in situ hydrogenation of phenol with lower carbon loss and higher conversion and selectivity to the desired products. The main reaction pathway was hydrogenated for benzene ring of phenol to produce cyclohexanone and cyclohexanol. In addition, the quantity of Hbeta (Si/Al = 60) and Raney Ni had marked impact on the carbon loss, but little effect on both the conversion and the products distribution. And the mixed catalysts of Raney Ni and Hbeta (60) exhibited excellent stability after cyclic uses.
