Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 53, Issue 39, Pages 14932-14940Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ie5021156
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Funding
- National Ministry of Education [NCET-10-878]
- Shaanxi 13115 Innovation Project [2009ZDKJ-70]
- Shaanxi Key Innovation Project [2011ZKC4-08]
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A series of Zn-modified nano-HZSM-5 (Zn/NZ) zeolite catalysts were prepared and used in the conversion of methanol to light aromatics (benzene, toluene, and xylene; BTX). The reaction conditions and loading of Zn exhibited a significant influence on the BTX yield. The interaction of Zn species with hydroxyl groups (OH) occurred on the HZSM-5 surface with the loading of Zn on a HZSM-5 zeolite. Such interaction distinctly changed the texture and acidity of the Zn/HZSM-5 catalyst. On the other hand, reduction of the Zn/NZ crystal size not only improved the interaction of Zn species with HZSM-5 but also enhanced the resistance of coke deposition. The high BTX yield of 67.7% and good catalytic stability were obtained on a 0.5 wt% Zn/NZ catalyst, mainly because of its proper concentration and distribution of acide sites as well as the small crystal size with improved physical transport.
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