分子筛负载型加氢脱硫催化剂的制备及其性能

Preparation and Performance of Nano-mesoporous Molecular Sieve Supported Hydrodesulfurization Catalyst

采用溶胶-凝胶法低温一步合成了2种纳米介孔分子筛,对合成的样品进行了表征,并将其分别负载30%Ni2P(Co2P),将该催化剂用于噻吩加氢脱硫实验,考察了其加氢脱硫性能及稳定性.结果表明,样品具有介孔特性,晶粒粒径约30nm,孔径集中在20nm左右,比表面积为400m2/g,有一定弱酸性,有较好的热稳定性.4种催化剂的第一次加氢脱硫率以CTAC为模板剂的载体比以CTAB为模板剂的载体高,以Co2P为活性组分比Ni2P高,低温比高温高.4种催化剂第二次加氢脱硫率都有较大程度的降低,以Ni2P为活性组分的催化剂减少比Co2P高,360℃比300℃高,以CTAB为模板剂所制催化剂减少比CTAC高.

Two kinds of nano-mesoporous molecular sieve were synthesized by one-step sol-gel method at low temperature and characterized, then the synthesized samples were loaded with 30% Ni2P and Co2P, and applied in the hydrodesulfurization experiments of thiophene. The experimental results indicate that the samples have mesoporous characteristic, crystal grain size about 30 nm, pore diameter around 20nm, and specific surface area about 400 m^2/g. They also have certain weak acidity and good thermal stability. The first hydrodesulfurization rate （η） of the catalysts with CTAC as template solvent is higher than that with CTAB, of those with Co2P as active component is higher than that with Ni2P, η at the low temperature is higher than that at high temperature. Four catalysts reduce HDS capability greatly, the catalysts with Ni2P as active component reduce more than that with Co2P as active component, η reduces more at 360℃ than that at 300℃, the catalysts with CTAB as template solvent reduce more than that CTAC as template solvent.