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- Title
Non‐hydrocracking of diesel over hierarchical hzsm‐5 zeolite to produce gasoline.
- Authors
Lian, Zhentao; Yang, Chao; Shi, Li; Meng, Xuan; Liu, Naiwang; Yang, Yue; Wang, Xin
- Abstract
A series of ZSM‐5 zeolites (SiO2/Al2O3 = 50) were desilicated by sodium hydroxide with different concentrations (0.1 mol/L, 0.3 mol/L, 0.5 mol/L and 0.7 mol/L). The crystal morphology, textural property and acidic property of the catalysts were characterized by XRD, TEM, N2 adsorption–desorption isotherm, NH3‐TPD, 27Al MAS NMR and IR spectroscopy. Meanwhile, the influence of sodium hydroxide concentration in the gasoline yield, products distribution, coke deposition in the non‐hydrocracking of diesel were studied. Results showed that mesopores were successfully induced to ZSM‐5 zeolites after desilication; more weak acid sites and Lewis acid sites (LAS) were generated; in contrast, the strong acid sites and Brønsted acid sites (BAS) were weakened, leading to an increased ratio of LAS to BAS (LAS/BAS). After alkali treatment, HZ‐0.5A exhibited the maximal conversion, yield and selectivity of gasoline; while the HZ‐0.5A‐1 AC exhibited a lower yield and selectivity. It was also observed that the amount of coke and P/O performed a positive relationship with the LAS/BAS. Non‐hydrocracking of diesel over a series of hierarchical HZSM‐5 zeolites were desilicated by NaOH solution produced the gasoline, liquefied petroleum gas, dry gas and coke.
- Subjects
ZEOLITE catalysts; SODIUM hydroxide; CRYSTAL morphology; HYDROCRACKING; NUCLEAR magnetic resonance spectroscopy; LEWIS acids
- Publication
Applied Organometallic Chemistry, 2018, Vol 32, Issue 12, pN.PAG
- ISSN
0268-2605
- Publication type
Article
- DOI
10.1002/aoc.4587