摘要
通过分析３０μｍ颗粒在扬析及膨胀实验中表现出的特异性，提出３０μｍ是尚未发生稳定团聚的最小粒径．实验证明：在浓相条件下，３０μｍ颗粒的气含量最大，塌落时间最长；在稀相条件下，采用３６μｍ的ＦＣＣ颗粒，使提升管反应器中固含率分布的均匀性较５４μｍ颗粒有了明显改善．上述结果预示着工业流化装置中使用的催化剂颗粒还有可能在颗粒尺寸方面进一步优化．
30 μm is considered the smallest size of particles which do not aggregate in view of the analysis of the specific characteristics in elutriation and expansion experiments. Our tests indicate that 30 μm parti cles have the largest gas hold-up and the bed takes the longest time to collapse. Compared with 54μm FCC particles, the uniformity of solids fraction in a riser reactor is greatly improved in the bed with the 36μm FCC catalyst, especially in a dilute phase. All these results indicate that the catalyst can be further optimized in the context of particle size.
出处
《化工冶金》
EI
CSCD
北大核心
1998年第1期38-43,共6页
基金
国家自然科学基金
清华大学基金
