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移动床用甲醇制芳烃小球催化剂性能评价
Performance Evaluation of Bead Catalysts for Methanol toAromatics in Moving Bed
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- DOI:
- 作者:
- 冯丽梅，徐亚荣
Feng Limei, Xu Yarong
- 作者单位:
- 中国石油乌鲁木齐石化公司研究院，新疆 乌鲁木齐 830019
Research Institute of Urumqi Petrochemical Company, PetroChina, Urumqi 830019, China
- 关键词:
- 甲醇；ZSM-5；分子筛；芳构化
methanol; ZSM-5; molecular sieve; aromatization
- 摘要:
- 摘要：研究中对 HZSM-5分子筛进行了酸碱后处理，制备了移动床上可用的介孔—微孔复合的多级孔小球分子筛，负载活性组分（Zn和 P）后，在固定床装置上进行了甲醇芳构化性能评价。实验结果表明，在反应温度420~440 ℃、压力0.5 MPa、空速1 h-1的条件下，甲醇转化率接近100%，C5+收率平均为31.54%，油相中芳烃含量达69.37%，其中二甲苯占比30.27%，重芳烃（C10+）平均含量为15.15%。此外，催化剂经过330 h长周期评价，比表面积389 m²/g，磨损率仅3%，催化剂表现出良好的稳定性。再生实验表明，催化剂经多轮再生后仍保持较高活性，但强酸位点减少导致芳烃选择性略有下降。
Abstract: This study successfully developed a mesoporous-microporous hierarchical spherical catalyst suitable for moving-bedprocesses by modifying HZSM-5 zeolite through acid-base post-treatment. Using Zn and P as active components, the catalyticperformance for methanol aromatization was systematically evaluated in a fixed-bed reactor. Under optimized reaction conditions(420-440 ℃, 0.5 MPa, WHSV=1 h-1), the catalyst exhibited outstanding catalytic performance: near-complete methanol conversion(~100%), a C5+ liquid yield of 31.54%, and high aromatic selectivity (69.37%, including 30.27% xylenes and 15.15% C10+ heavyaromatics). The catalyst demonstrated excellent physical properties, with a specific surface area of 389 m²/g, an abrasion rate of only3%, and a sphericity of 0.98. Long-term stability testing over 330 hours confirmed the catalyst's robust performance. Regenerationstudies showed that the catalyst maintained high activity after multiple regeneration cycles, though a slight decrease in aromaticselectivity was observed due to the reduction of strong acid sites.