摘要
通过正己烷低温转化的活性表征了固体超强酸SO_4~2-WO_3-ZrO_2的超强酸性,考察了WO_3/ZrO_2比、处理硫酸的浓度及焙烧温度对催化剂活性的影响。结果表明,SO_4~2-WO_3-ZrO_2三组分复合催化剂的活性比SO_4^(2-)-ZrO_2和WO_3-ZrO_z双组分催化剂的都高,且活性能在较宽的温度范围内得到保持。WO_3的存在,能明显地提高SO_4~3-的滞留量,增大样品的比表面。在用1mol/1 H_2SO_4处理、WO_3/ZrO_2重量比为0.15和700℃焙烧的条件下,催化剂的SO_4^(2-)含量及比表面最大,对正己烷转化的活性最高。
The superacidity of solid superacid SO_4^(2-)-WO_3-ZrO_2 was characterized by the activity of n-hexane conversion reaction at low temperatures. The effects of WO_3/ZrO_2 ratio, H_2SO_4 concentration for treatment and calcination temperature on the activity of the catalyst were investigated. Results show that the activity of SO_4^(2-)-WO_3-ZrO_2 is higher than that of SO_4^(2-)-ZrO_2 and WO_3-ZrO_2 within a wide range of calcination temperatures. WO_3 obviously plays a role of promoting the stabilization of SO_4^(2-) with it and enlarging the specific surface area of the catalyst. The catalyst treated by 1 tool/1 H_2SO_4, with weight ratio of 0.15g WO_3/ g ZrO_2 and under calcination temperature of 700℃ shows the largest amount of SO_4^(2-) stabilized and the highest specific surface area of the catalyst, and hence the highest activity for nhexane conversion.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
1995年第3期42-48,共7页
Acta Petrolei Sinica(Petroleum Processing Section)
关键词
复合固体超强酸
正己烷
低温转化
催化剂
complex solid superacid, SO_4^(2-)-WO_3-ZrO_2, n-hexane conversion at low temperature
