Hydrocracking of n-decane over non-sulfided Ni-Cs_xH_(3-x)PW_(12)O_(40)/Al2O3 catalysts NHao JinDState Key Laboratory for Physical Chemistry of the Solid Surfaces, Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 3SW05, PR China

摘要

The effect of Cs content in Cs_xH_(3-x)PW_(12)O_(40) on the catalytic performance of the reduced Ni-Cs_xH_(3-x)PW_(12)O_(40)/ Al2O3 catalysts for hydrocracking of n-decane with the presence of thiophene and pyridine is studied. The catalysts were characterized by BET, XRD, in situ XRD, Raman, H2-TPR, H2-TPD, NH3-TPD and FT-IR of pyridine adsorption. The best result was obtained on 8%Ni-50%CsH2PW_(12)_(40)/Al2O3 catalyst which shows the highest catalytic activity and with tolerance to 525 ppm of thiophene and 170 ppm of pyridine (the reaction conditions: 2.0 MPa, LHSV = 2.92 h~(-10, H2-decane 1500 vol/vol at 300 °C). The high catalytic performance of the catalyst may be due to the proper balance between metal and acid functions by adding a certain proportion of Cs to the system.