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一、实验装置 二、实验操作 1.用长35—40cm、内径2—3cm的硬质玻管。先将玻璃毛做成小球,从一端推入管中的1/2处,长度约1cm。放入新制备的疏松多孔的Cr_2O_3,其长度约4—5cm(最好把管子垂直放在桌上振动几次,月的是使催化剂既要紧密接触,但又不能挤压成粉末),再放入玻璃毛,
First, the experimental device Second, the experimental operation 1. Use 35-40cm long, diameter 2-3cm hard glass tube. The glass wool was first made into a small ball and pushed from one end into the tube at 1/2, and the length was about 1 cm. The newly prepared porous porous Cr 2 O 3 is about 4-5 cm in length (preferably the tube is shaken several times on a table in a vertical direction, and the month is such that the catalyst must be in close contact, but it cannot be pressed into a powder). Put glass wool,