碳五烃催化裂解制取丙烯/乙烯反应性能

以ZSM-5分子筛为催化剂,碳五烃混合物为裂解原料,考察空速对碳五烃催化裂解制丙烯/乙烯反应性能的影响。结果表明,在580℃和实验空速范围,随着空速的增加,碳五烷烃及烯烃转化率整体呈下降趋势,但碳五烯烃转化率远高于碳五烷烃。乙烯及丙烯收率在空速3 h-1时达到最大,分别为10.51%和13.02%。碳四烯烃收率随空速的升高而降低,但各丁烯异构体相对于总烯烃的质量分布接近热力学平衡态。

Catalytic cracking performance for C5 hydrocarbon to propylene and ethylene

Using ZSM-5 molecular sieve as the catalyst,the influence of space velocity on catalytic cracking performance for C₅ hydrocarbon to propylene and ethylene was investigated.The results showed that under the condition of 580 ℃ and experimental space velocity,the conversion of C₅ alkane and C5 olefins decreased with the increase of space velocity, and the conversion of C₅ olefins was much higher than that of C₅ alkane.Under space velocity 3.0 h-1,the yield of propylene and ethylene reached maximum,10.51% and 13.02%,respectively.The yield of C₄ olefins isomer decreased with the increase of space velocity,but thermodynamics equilibrium data were in accord with experimental data from C₄ olefins isomer mass fraction based on total olefins.