Dual-Temperature Crystallization Synthesis of Secondary-Growth SAPO-34 Molecular Sieve with Adjusted Silicon Content for Superior MTO Catalysis.
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| Title: | Dual-Temperature Crystallization Synthesis of Secondary-Growth SAPO-34 Molecular Sieve with Adjusted Silicon Content for Superior MTO Catalysis. |
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| Authors: | Zhang, Haijun1 (AUTHOR), Li, Yuwei1 (AUTHOR), Zheng, Yulong1 (AUTHOR), Chen, Lei1 (AUTHOR), Yang, Gang1 (AUTHOR) yanggang@njtech.edu.cn |
| Source: | Catalysis Letters. Jun2026, Vol. 156 Issue 6, p1-11. 11p. |
| Subjects: | Catalyst selectivity, Crystallization, Porosity, Catalysis |
| Abstract: | Based on the dual-temperature method (100 ℃ for 6 h and then 200 ℃ for 12 h), the novel surface modification strategy involving secondary growth with the pre-synthesized nano-flake SAPO-34 seeds is presented for the synthesis of hierarchical pore SAPO-34. The effective regulation of the silicon content in the initial gel modulated the pore architecture and the acid strength of the SAPO-34 product. The optimized catalyst demonstrated a superior selectivity for the light olefins and a suppression of the coke deposition, leading to a prolonged catalytic lifetime. The catalytic performance showed a trend of first increasing and then decreasing with the silicon content. The optimal catalyst demonstrated an excellent selectivity of 95.88% and an extended lifetime of 600 min. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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