Secondly, the acid strength, specific surface, size and the feature, the structure of acid center and the content of Sulphur and Titanium have been characterized by IR, XRD, TEM, SEM, BET, EDS,TG-DTA and Hammett indicator.

• 我们利用IR，XRD，TEM，SEM，BET，EDS,TG-DTA，Hammet指示剂法等表征手段对催化剂的酸性，比表面，粒度形貌，酸中心结构，硫钛含量等进行了考察。