摘要
在小型固定流化床上采用模拟干气作为反应系统催化剂的流化气(亦即原料雾化气,由干气和水蒸气组成),考察了在不同反应温度、剂油比、空速和反应时间条件下,重油催化裂化产品分布的变化。结果表明,在460- 540℃的反应温度范围内、剂油比4-8、空速10-30 h-1,反应时间2-3 s的反应条件下,产品分布和转化率都随流化气中干气比率的增大而发生变化,气体、汽油等轻组分产率降低,柴油和重油的产率升高,焦炭产率的变化规律不明显。而且在反应温度和空速越低、剂油比越大、反应时间越长的条件下,催化裂化反应受干气比率的影响越明显。
The product distributions of heavy oil FCC are studied at different reaction temperatures, catalyst to oil ratios, hourly space velocities and reaction time on a miniature fixed-bed pilot plant using simulated dry gas as fluidizing gas of catalyst （i. e. feed atomizing gas consisting of dry gas and steam）. The results demonstrate that, at the conditions of 460 ～540℃ reaction temperature, 4～ 8 catalyst to oil ratio, 10 ～ 30 h^（-1） hourly space velocity and 2 ～ 3 seconds of reaction time, the product distribution and conversion vary with increase of dry gas percentage in fluidizing gas, i.e. the yields of light components like gas and gasoline ere go down while those of heavier fractions like diesel and heavy oil go up, and there is no significant change in coke make. The impact of dry gas on FCC reaction becomes increasingly pronounced with lower reactor temperature and lower hourly space velocity, greater catalyst to oil ratio and longer reaction time.
出处
《炼油技术与工程》
CAS
北大核心
2006年第6期22-26,共5页
Petroleum Refinery Engineering
