摘要
The acidic properties of aluminum phosphate （A1PO4-5） solid acid catalyst were characterized by tem- perature programmed desorption （TPD） of ammonia （NH3）, n-propylamine （n-C3HTNH2）, iso-propylamine [（CH3）2CHNH2] and n-dipropylamine [（C3H7）2NH] separately, and its catalytic performance in benzene alkylation with long chain olefin was studied in a fixed-bed reactor. The characterized acid amount of catalyst increased with the basicity of adsorbates. With increase of the activation temperature of catalyst, the acid amount characterized by NHa-TPD decreased, however, it increased when characterized by TPD using three other adsorbates. The desorption kinetics of TPD process and the deactivation kinetics of catalyst were investigated. The acidity and catalytic per- formance of catalyst was also correlated. The results showed that the acid amount and strength are well correlated with the activity and stability using NH3 as adsorbate, respectively, which indicated NH3 was a better basic adsorbate. It was also found that the catalyst with higher acid amount and lower acid strength on the surface exhibited the better catalytic performance and stability.
铝磷酸盐( AlPO4-5 )的酸的性质稳固的酸催化剂被温度描绘氨( NH3 )的规划解吸附作用( TPD )， n-propylamine ( n-C3H7NH2 )， iso-propylamine [( CH3 ) 2CHNH2 ]并且 n-dipropylamine [( C3H7 ) 2NH ]独立，并且它在有长链石蜡的苯完化的催化表演在一个改正床反应堆被学习。催化剂的描绘的酸数量与被吸附物质的盐基度增加了。随催化剂的激活温度的增加，然而， NH3-TPD 描绘的酸数量减少了什么时候用三种另外的被吸附物质由 TPD 描绘了，增加了。TPD 过程的解吸附作用动力学和催化剂的释放动力学被调查。酸味和催化剂的催化性能也被相关。结果证明酸数量和力量很好与显示 NH3 是一种更好基本的被吸附物质的分别地，把 NH3 用作被吸附物质的活动和稳定性被相关。有更高的酸的催化剂总计，这也被发现，表面上的更低的酸力量展出了更好催化的表演和稳定性。
