本文用分子探针法测定SiO_2、1-Al_2O_5·SiO_2和2-Al_2O_3·SiO_2三种载体的表面结构,进一步研究、分析活性组分的分布,从而推出催化性能发生明显变化的可能原因。 (一)实险部分 1.不可逆吸附量的测定和计算分别按文献[1]和[2]中的方法进行。 2.SiO_2载体:微球形硅胶经6N盐酸处理,然后在1000℃下灼烧六小时,在室 In this paper, the surface structures of three carriers, SiO_2,1-Al_2O_5 · SiO_2 and 2-Al_2O_3 · SiO_2, were determined by molecular probe method. The distributions of the active components were further studied and the possible reasons for the significant change in the catalytic performance were deduced. (A) of the real risk part 1. Determination and calculation of irreversible adsorption capacity, respectively, according to the literature [1] and [2] in the method. 2.SiO2 carrier: microspherical silica gel was treated with 6N hydrochloric acid, and then burning at 1000 ℃ for six hours, in the room