催化裂化汽油裂解制丙烯

Study on FCC gasoline cracking for propylene

以催化裂化汽油为原料,水热处理后的HZSM-5分子筛为催化剂,催化裂解制丙烯。比较了水热处理后的HZSM-5分子筛催化剂上负载镧和未负载镧的催化裂化性能,并考察了镧的最佳负载量。结果表明,水热处理后负载镧提高了催化剂活性、稳定性和丙烯选择性,负载镧质量分数为8%时,催化裂化性能最佳。当反应温度550℃和空速4 h^(-1)时,丙烯收率12.51%。

Using the catalytic cracking gasoline as raw materials, propylene was prepared over HZSM-5 zeolite which was treated by hydrothermal method. The catalytic cracking performance of HZSM-5 zeolite loaded and unloaded lanthanum and the optimal loading of lanthanum were investigated. The results showed that after hydrothermal treatment, La loaded HZSM-5 zeolite enhanced the catalyst activity,stability and selectivity to propylene. HZSM-5 zeolite with lanthanum loading of 8% had the best catalytic performance. The propylene yield of 12.51% was obtained under the condition of reaction temperature 550℃ and space velocity 4 h^-1.